GOST certified testing site. Certification of testing equipment. State standard of the USSR

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GENERAL REQUIREMENTS

GOST 28697-90

USSR STATE COMMITTEE FOR PRODUCT QUALITY MANAGEMENT AND STANDARDS

Moscow

STATE STANDARD OF THE USSR UNION

PROGRAM AND TESTING TECHNIQUE FOR BELLOWS COMPENSATORS AND SEALS

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Program and test methods of bellows compensators and seals. General requirements

GOST 28697-90

Date of introduction 01/01/92

This standard applies to the program and methodology for control testing of bellows expansion joints and metal seals carried out at the stages of their development and production.

The standard establishes general requirements, required types tests, sequence, rules and conditions for their conduct, as well as the procedure for recording the results.

The standard does not apply to preliminary and type tests, which must be carried out according to special programs.

The terms and definitions used in this standard are given in Appendix 1.

The provisions of this standard are mandatory.

1. TEST REQUIREMENTS

1.1. In the process of creating bellows metal expansion joints and seals (hereinafter referred to as SK and UP), as well as their production, in general, acceptance, qualification, acceptance and periodic tests should be carried out.

Arbitration tests are also carried out according to this standard. The definition of arbitration tests and the procedure for organizing their conduct are given in clause 1.5.

1.2. According to the level of acceptance testing, there can be: state, interdepartmental, departmental.

Acceptance tests are carried out by acceptance committees appointed by order of the head of the developer enterprise. State acceptance commissions are appointed by the ministry (department) - the product developer.

1.3. Acceptance tests are not carried out in the following cases:

1) modernization of products through changes made to the design of the product, its material design or manufacturing process;

2) creating a standard size range based on a product previously put into production or expanding an existing standard size range with one or more products with different values conditional passage(Dу) and (or) conditional pressure (Py)

Notes:

1. According to listing 1 in in the prescribed manner Type tests are assigned to these products.

2. According to listing 2, acceptance tests of newly developed standard sizes SK and UP are allowed, which is specified in terms of reference for their development.

1.4. Qualification tests are not carried out:

1) in the manufacture of prototypes for acceptance testing by the enterprise designated as the manufacturer of these products;

2) in the manufacture of product samples for type testing by the manufacturer of these products.

1.5. Arbitration tests (examinations) are carried out on samples of specific products, the need for an objective assessment of the quality of which is determined in the prescribed manner by arbitration, law enforcement bodies or government supervision bodies. Tests (examinations) are carried out by the parent organization for state testing of products of this type (hereinafter - GOGIP), which issues a conclusion based on their results with attached test reports to the interested body (bodies).

1.6. Acceptance, qualification, periodic and arbitration tests are carried out on samples of single products or on typical representatives of groups of homogeneous products (controlled batches of products).

1.7. The procedure for forming groups of homogeneous products and selecting samples for testing is established by industry normative and technical documentation (hereinafter - NTD) in agreement with a representative of the customer (main consumer), and, if necessary, with a representative of the state supervisory authority.

Note. Selection of product samples for testing from among typical representatives (controlled batches) is carried out using a single sampling method, taking into account the requirements of GOST 18321.

1.8. In general, products (SC, UP) are considered homogeneous if they are characterized by:

1) the generality of the design and technological solution, which in this case means single design bellows and a unified technological process for manufacturing this group of products;

2) the same material performance of the main components products (bellows, connecting fittings);

3) generality of functional purpose, which is understood as the ability to provide movement of the same type: axial stroke, shift, angular stroke (rotation) or combinations thereof, regardless of the types of products.

Notes:

1. Large-scale changes in the design of products within the size range (according to Dy, Ru) are not signs of heterogeneity.

2. In the general case, a group of homogeneous products can be composed of several individual products, a standard-size range of products, or several standard-size series.

1.9. Tests should be carried out in the order established in Appendix 2; The procedure for preparing, submitting and approving documents based on test results is given in Appendix 3.

Standard forms of acceptance committee acts are given in Appendices 4, 5.

1.10. Before the start of acceptance tests, the production personnel of the manufacturer of the SC, UP must check:

1) compliance of the technological process of product manufacturing with the requirements of the technological documentation valid at the time of the start of testing;

2) completeness of operational control performed during the manufacturing process of products;

3) product compliance with the requirements of design documentation, including main dimensions, strength and tightness tests, appearance and labeling;

4) serviceability of testing equipment and measuring instruments.

1.11. By the start of acceptance, qualification, periodic and arbitration tests of products must be completed preparatory activities, providing:

1) certification of the testing unit;

2) logistics and metrological support for testing;

3) production of prototypes or product samples (standard representatives) and their acceptance by the technical control service of the manufacturer;

4) appointment of an acceptance committee and creation of the necessary conditions for its work - during acceptance tests;

5) appointment of a responsible deliverer of tested prototypes of products - during acceptance tests;

6) appointment of a responsible person for conducting qualification, periodic and other tests of products;

7) preparation of documentation in accordance with table. 1 and the technological equipment necessary to perform the tests.

Table 1

Documents submitted for testing	Types of tests
Documents submitted for testing	acceptance	qualifying	acceptance	periodic and others
Terms of reference for the development of the SK (UP) and all additions to it (if any)
Draft normative documentation for products
Regulatory documentation for products
Materials of preliminary tests (if carried out)
Acceptance test report
CD kit
TD set
Standard (or private) test program and methodology (if developed)
Map technical level and product quality according to GOST 2.116
Passport(s) for product samples or typical representatives of a group of homogeneous products with a mark on their inspection or acceptance by the technical control service
Materials for operational acceptance during the manufacturing process
Act of sampling for testing
Documents confirming the compliance of the materials used with the regulatory and technical documents for the material
Documents confirming the certification of test benches and verification of measuring instruments
Test materials of the parent organization for state tests*
Order (decision) on the appointment of an acceptance committee
Order (instruction) on the appointment of a responsible deliverer
Order (instruction) on the appointment of a person responsible for testing

* GOGIP transfers test materials, test reports and conclusions to the acceptance committee at its request.

Notes:

1. The “+” sign means that the document is being submitted, the “-” sign means that the document is not being submitted.

2. At the request of the acceptance committee, other documents must be submitted, if their development is provided for in the technical specifications - for acceptance testing.

1.12. The appointment of a person responsible for conducting qualification, periodic and other tests of products must be carried out by order (instruction) of the head of the manufacturer.

The appointment of a responsible submitter must be carried out by order (instruction) of the head of the enterprise conducting the tests.

1.13. Tests should be carried out in closed heated rooms at an ambient temperature of (293 ± 10) K ((20 ± 10) °C).

1.14. Test equipment must be certified according to GOST 24555, and measuring instruments must be verified.

1.15. Tests should be carried out using simulators of working environments ( drinking water, atmospheric air), if the use of a specific test environment is not specified in the technical documentation for this product.

2. TEST PROGRAM

2.1. Test object

2.1.1. The test objects are:

1) prototypes of single products or samples - typical representatives of groups of homogeneous products (hereinafter referred to as prototypes) - during acceptance tests;

2) samples of single products or samples - typical representatives of groups of homogeneous products, mastered for the first time by a given enterprise (hereinafter referred to as samples of products being mastered) - during qualification tests;

3) samples of single products or samples - typical representatives of groups of homogeneous products produced by a given enterprise (hereinafter referred to as samples of manufactured products) - during periodic testing finished products;

4) samples of products according to lists 1-3, planned for export;

5) manufactured products in the volume of manufactured batches - during acceptance tests;

6) samples of specific products for which testing must be carried out in the prescribed manner independent assessment quality - during arbitration and other types of control tests (examinations).

2.1.2. Acceptance tests should be carried out on each batch of products.

2.1.3. All types of tests (except acceptance tests) are subjected to at least two samples of each single product, specific product (standard size) or typical representative of a group of homogeneous products. The index “I” is applied to each sample, indicating that the product belongs to the tests. The number of samples to be tested must correspond to that specified in the technical documentation for this product.

2.2. Controlled parameters and characteristics

2.2.1. In general, the composition of the tests and the sequence of checks must correspond to those indicated in table. 2, if other tests are not provided for in the regulatory and technical documentation for this product. If it is necessary to carry out additional checks, private (working) programs and test methods must be developed that take into account the requirements of this standard and are agreed upon in the prescribed manner with the customer (main consumer).

table 2

Tested parameters and characteristics	Types of tests
Tested parameters and characteristics	acceptance	qualifying	acceptance	periodic and others
Strength
Heat resistance
Tightness
Main dimensions and markings
Appearance
Stiffness and amplitudes of static movements
Vibration strength
Impact resistance
Probability of failure-free operation
Tightness

Note. The “+” sign means that the tests are carried out, the “-” sign means that they are not carried out.

2.2.2. Tests according to table. 2 all samples submitted for testing are subjected to.

2.3. Conditions and procedure for testing

2.3.1. SK and UP strength tests are carried out with test hydraulic pressure of the test medium, the value of which for a given conditional pressure Ru is established by GOST 356, unless other standards are provided for in the normative and technical documentation for this product.

During testing, products must be protected from tension (compression).

Note. It is allowed to carry out tests at the pressure of the test medium Pisp = Ru if this is provided for in the technical documentation for this product. The test medium is water.

2.3.2. Tests for heat resistance are subject to SK and UP intended for operation in working environments with temperatures above 423 K (150 °C).

Tests are carried out by control heating of products in a preheated oven to a temperature of (548 ± 25) K ((275 ± 25) °C).

Note. Products whose design contains a guide pipe are subjected to heat resistance testing before installing the pipe.

2.3.3. Leak tests are carried out in accordance with clause 2.3.11.

2.3.4. The main dimensions of the SC and UP are controlled measuring instrument second accuracy class by comparing actual values with the dimensions established by the design documentation.

Product labeling is checked visually.

2.3.5. The appearance of the SK and UP is checked by inspection for the absence of damage and defects in the structural elements. During the inspection, the surface quality of the bellows and the connecting surfaces of the flanges should be checked.

2.3.6. Determination of rigidities - axial (Cl), shear (Cd) angular (rotation, Cg) should be carried out at atmospheric pressure of the test environment within the amplitudes of displacement (l, d, g) established by the technical documentation for this product. The test medium is air.

2.3.7. The displacement amplitudes (static) l, g, d, established by the NTD for this product (by the draft NTD), are controlled in the process of determining the rigidities (Cl, Cg, Cd) in accordance with clause 2.3.6.

2.3.8. Vibration tests should be carried out in the axial and transverse directions at atmospheric pressure. The test medium is air.

The frequency range and permissible vibration acceleration are accepted in accordance with the requirements of the NTD for this product.

2.3.9. Impact tests should be carried out in the axial and transverse directions at atmospheric pressure of the test environment.

The characteristics of shock loads in terms of acceleration, pulse duration, and number of impacts are established by the technical documentation for the product.

Note. Depending on the design features of the products, their weight and overall dimensions, testing of the SK and UP for the ability to withstand the destructive effects of impact loads can be carried out by simulating the impact of the impact with other types of loading, equivalent to it in terms of the level of stress in the structure caused by the impact.

2.3.10. Tests to confirm the probability of failure-free operation (hereinafter - FBG) of the SC and UP should be carried out for the designated operating time, with amplitudes of repeated-static movements and the influence of the test internal (external) hydraulic pressure Risp = Ru established by the NTD for the product. The test medium is water.

Notes:

1. The FBG value for newly developed products must be determined during preliminary tests, if they are carried out. If preliminary tests are not carried out, the determination of FBG is carried out during acceptance tests.

2. The determination of FBGs should be carried out experimentally or taking into account additional information on testing analogues (or the main elements of the SC, UP) according to the regulatory and technical documentation in force in the industry - the product developer.

2.3.10.1. Confirmation of the FBG is carried out by test operation with the number of failures equal to zero.

2.3.10.2. When the SC and UP are exposed to several types of displacements (loads), tests should be carried out in one equivalent mode, corresponding in terms of the damaging effect of the totality of operational loads (loading modes).

The parameters of the equivalent test mode are determined by the developer of the IC and CP by calculation according to the methods used in the industry, and the calculation itself is attached to the test materials (if these parameters are not specified in the technical documentation for this product).

2.3.11. Leak tests should be carried out during acceptance tests of products, as well as after tests according to paragraphs. 2.3.8, 2.3.9 and 2.3.10.

The threshold sensitivity of the tightness control system, as well as the level (class) of tightness of products, is set depending on the operating conditions of the technical documentation for the product.

2.3.12. Weight control should be carried out by weighing the samples presented for testing.

2.4. Requirements for metrological testing

2.4.1. Logistics and metrological support for testing is carried out by the company conducting the testing.

2.4.2. The necessary measuring instruments (instruments and devices) are prescribed taking into account the measurement errors of controlled quantities established by the normative and technical documentation for products, from among those permitted for use.

2.4.3. A typical list of types of instruments and devices used when checking the parameters and characteristics of the SC and UP is given in Appendix 6.

A specific list of materials, measuring and recording instruments must be given in private (working) test methods.

2.5. Work safety requirements

2.5.1. The safety and trouble-free testing is ensured by the enterprise where the tests are carried out, in accordance with the requirements in force in the industry.

2.5.2. Test stands must be provided with fences and warning signs in accordance with GOST 12.4.026 with an explanatory inscription: “CAUTION! TESTS ARE CONDUCTED!”

2.5.3. Whenever emergency situation tests must be stopped immediately, the stand and equipment must be de-energized. Resumption of testing is allowed only after the causes that caused the emergency have been eliminated.

2.5.4. All testing work is carried out by personnel who have undergone appropriate training, under the guidance of the responsible contractor or the person responsible for testing.

2.5.5. Objects weighing more than 20 kg must be moved using lifting equipment.

3. TEST PROCEDURE

3.1. Depending on the composition of the testing equipment and measuring instruments, private (working) test methods should be developed based on this standard.

3.2. Methodology of acceptance tests

3.2.1. Strength testing should be carried out on products in assembled form, without protective covers. Products must be cleared of foreign objects; Availability paint coatings on connecting surfaces and bellows is not allowed.

3.2.2. The process of loading the SC and UP with pressure is carried out sequentially in steps, with holding time every 0.1 Risp (but not less than 0.05 MPa (0.5 kgf/cm2)), for 1-2 minutes. In all cases, it is not allowed to load the product with a pressure exceeding the value of the test pressure Ppr, as well as the value of the nominal pressure Ru when tested according to clause 2.3.10.

3.2.3. The SK and UP are considered to have passed the tests if, under the test pressure load Ppr, no drop in pressure was observed for 5 minutes, and after the load was reduced from the test pressure value to the conditional Ru, no loss of axial stability was observed.

3.2.4. Heat resistance control is carried out visually after heating the products for 1 hour in a preheated oven. Visible peeling, swelling, cracks and tears on the inner and outer surfaces of the bellows and welds are not allowed.

3.2.5. Tightness control should be carried out in accordance with the requirements of clause 3.7.

3.2.6. Dimensional control and marking verification should be carried out on a surface plate in a room with general and local lighting that meets the established standards for machine-building workshops.

The accuracy of dimensional control is determined by the maximum deviations specified in the design documentation.

3.2.7. Appearance control should be carried out under the conditions specified in clause 3.2.6. The surfaces of the bellows and the connecting surfaces of the flanges are checked by comparison with a control sample of the permissible surface condition (control samples). Control samples for the connecting surfaces of the SK and UP and the surfaces of the corrugated part of the bellows must be made by the manufacturer of the product, agreed with the developer and approved in the prescribed manner.

Damage to SK and UP structural elements, as well as defects on the surfaces of bellows and connecting surfaces of flanges, greater than those of control samples, are not allowed.

3.3. Methodology for determining (checking) rigidities and amplitudes of static movements

3.3.1. Determination of axial stiffness Cl under compression-tension

3.3.1.1. The bellows compensator or seal (test sample) is installed on the stand in accordance with Appendix 7, Fig. 12.

The center of application of the force providing movement is aligned with the center of the product (axis of symmetry). The permissible deviation is established in accordance with the technical documentation for the testing equipment (stand).

3.3.1.2. A test force is applied to the sample, providing compression (tension), and the correct installation of the product on the stand is checked.

The installation is considered correct if the movement of the free end of the product during compression (tension) occurs without distortions. The permissible deviations must not exceed the value of the tolerance for parallelism of the end surfaces of the product, established by the design documentation on the SK (UP).

3.3.1.3. Similar to clause 3.3.1.2, an axial force is applied to the product, which ensures compression (tension) of the bellows SK (UP) to the value of the amplitude of the axial stroke specified in the technical documentation for this product. Compression (stretching) is carried out stepwise, at intervals, up to 3-5 points. In this case, at each point (i) the value of the current movement liсж(rast) is recorded using the indicator and the applied force Qiсж(rast) is recorded using the dynamometer.

3.3.1.4. Measurements according to clause 3.3.1.3 are performed 3 times, after which the average values of the applied force Qciсж(rast) are determined in each i-th point.

Based on the average values of the applied forces Qci, the numerical values of stiffness () kN/m are determined for any fixed displacement value using the formula

Note. When determining the value of force Qci, the additional influence of the mass of connecting fittings DQ must be excluded:

Qiсж = Qi + DQ,

Qi grow = Qi - DQ.

3.3.2. Determination of angular stiffness Cg during rotation (bending) of the SC and UP

3.3.2.1. A sample of a rotary type SC is installed on a stand in accordance with Appendix 7, Fig. 3.

In the testing system for measuring the angular travel (rotation) values at the free side of the sample, a lever creating a bending moment Mizg and an optical quadrant fixing the angle of rotation must be installed on the connecting fitting SK. The turning force to the amplitude value established by the technical documentation for this product should be measured at regular intervals at 3-5 points with a dynamometer.

3.3.2.2. The average stiffness value is determined in the order given in paragraph 3.3.1.4.

Based on the average values of forces Qci bend, the numerical values of stiffness Cg i, kN-m/deg, are determined at any fixed value of the rotation angle (at the i-th point) using the formula

where Mizg is the bending moment created by the force Qci bend, at the current point i on the arm l kN-m;

Mizg.i = Qci izg.l.

3.3.2.3. Determination of the angular stiffness of universal SCs, as well as UP, is carried out using a method similar to that specified in paragraphs. 3.3.2.1, 3.3.2.2, in accordance with Appendix 7, drawing. 4.

The hinge unit of the technological equipment ensures rotation (bending) of the corrugated shell relative to the center of rotation of the product.

Note. When determining the numerical values of the stiffnesses SC (UP), in this case, the force created by friction in the hinge joints of the equipment must be excluded from the obtained measurement results.

3.3.3. Determination of shear stiffness Cd SC and UP

3.3.3.1. The bellows compensator or seal is installed on the stand in accordance with Appendix 7, drawing. 5.

3.3.3.2. The test system must be equipped with a dynamometer to measure force and an indicator to measure displacement (shear).

Shear-type products are tested in the delivered state, and universal-type and shear-rotary products are tested using special technological equipment.

3.3.3.3. A shear force Qsd, measured by a dynamometer, is applied to the sample SC (UP) from the side of the moving end in the direction perpendicular to the axis of the product.

The movement (shift di) is carried out stepwise, at equal intervals of 3-5 points, to the amplitude value specified in the technical documentation for this product.

3.3.3.4. The numerical value of shear stiffness Cd i, kN/m, is determined by the formula

where Qci shift is the average value of the force in 3 dimensions.

Note. When determining the numerical values of the stiffness of the SC (UP), the stiffness measurement of which is carried out using technological equipment, the force created by friction (DQ) in the hinge joints must be excluded.

3.3.4. The displacement amplitudes are checked when determining the corresponding rigidities according to the method given in paragraphs. 3.3.1.3, 3.3.2.1, 3.3.2.3, 3.3.3.

3.4. Vibration strength test method

3.4.1. Depending on the nature of vibration loads specified in the technical documentation for products, they can be assigned various methods tests using appropriate equipment:

1) the impact of vibrations in the frequency range from 5 to 60 Hz with vibration acceleration amplitudes of up to 19.6 m/s2, with testing of this impact in the resonant zone of the frequency range;

2) exposure to vibrations in the frequency range from 5 to 2000 Hz with vibration acceleration amplitudes of up to 294 m/s2.

3.4.2. The testing system must provide measurement of vibration acceleration amplitudes (m/s2), vibration frequencies (Hz), vibration displacement amplitudes (vibration swings, mm) and the time of exposure to vibration loads on the sample (s, h).

Note. The test equipment must be preliminarily checked over the entire frequency range for the presence of its own resonances, data on which (if any) are entered in the equipment passport (or a document replacing it). The occurrence of resonant oscillations at the natural resonant frequencies of the equipment during testing of a product is not a sign of resonance of the product.

3.4.3. Testing of product samples - according to clause 3.4.1, listing 1.

3.4.3.1. The product is installed on a vibration stand in accordance with Appendix 7, drawing. 6. Tests are carried out under the influence of vibration loads in the axial (hereinafter: along the X axis) and transverse (hereinafter: along the Y, Z axes) directions.

The feasibility of using special and unloading devices and equipment is determined by the testing department.

3.4.3.2. The product is tested as an assembly, unless other requirements are specified in the technical documentation for this product.

3.4.3.3. Acceleration sensors should be installed on the equipment and on the product so that their axis coincides with the direction of oscillation of the vibration exciter table of the stand. The number of sensors placed on the movable table of the stand's vibration exciter, equipment, and product elements depends on the size and design of the product, but should not be less than 4 pieces.

A non-contact method of measuring the amplitudes of vibration displacement of corrugation elements is allowed.

3.4.3.4. Vibration tests consist of the following stages:

1) tests to detect resonant frequencies (resonances);

2) vibration strength tests in a given frequency range;

3) vibration strength tests at resonant frequencies.

3.4.3.5. Tests to detect resonances are carried out with a smooth change in the frequency of disturbing oscillations (sinusoidal vibration) in each frequency band within the entire frequency range specified by the technical documentation for this product. The travel time of each frequency band (continuous frequency sweep speed) should be sufficient to detect resonance, but not less than two to three minutes in one direction.

After passing the entire frequency range in the forward direction (from the lower frequency to the upper), it is repeated in the opposite direction. A sign of resonance is an increase of two times or more in the amplitude of vibration displacement (vibration acceleration) of individual parts or structural elements products compared to the amplitude of vibration displacement (vibration acceleration) of fastening points measured by sensors installed on the side of the vibration source:

where A is the amplitude of vibration displacement (vibration acceleration) of the points of attachment to the table of the vibration accelerator of the stand, mm (m/s2);

A1 is the amplitude of vibration displacement (vibration acceleration) of the structural elements of the SK (UP) in the axial direction, mm (m/s2);

A2 - the same, in the transverse direction.

Notes:

1. Within the entire specified technical specification for a given frequency range of products, one or more resonant frequencies can be identified.

2. The division of a given frequency range into frequency bands is carried out in accordance with the rules established in industry normative and technical documents, depending on the design, purpose and scope of application of the SC and UP, unless other requirements are provided for in the normative and technical documentation for these products.

3. The difference in the amplitudes of vibration displacements (vibration accelerations) at any two points of one element of the product should not be more than 15%.

3.4.3.6. If resonances are not detected during the tests according to clause 3.4.3.5, the products are subjected to vibration strength tests in the frequency range specified by the technical documentation for this product.

Tests are carried out with a smooth change in the frequency of disturbing oscillations and at a speed of its continuous sweep, ensuring the following test duration:

2 hours - for axial exposure to vibration loads;

4 hours - for transverse exposure to vibration loads.

During testing, breaks are allowed, but the total duration of testing must be maintained.

3.4.3.7. The sample is considered to have passed the vibration strength test (clause 3.4.3.6) if, after exposure to vibration loads, it has not lost its tightness and a visual inspection does not reveal mechanical damage (cracks, destruction) of its elements.

3.4.3.8. If resonances are detected during testing according to clause 3.4.3.5, the products are subjected to vibration strength tests at the corresponding resonant frequencies and in the positions at which they were detected.

Tests according to clause 3.4.3.6 are not carried out in this case.

3.4.3.9. For products in which resonant vibrations of the same frequency occurred in the axial and transverse directions, tests according to clause 3.4.3.8 are carried out only in the position in which the amplitude of vibration displacement (vibration acceleration) was greater.

The duration of the tests (exposure) at each detected resonant frequency is determined from the condition of the product oscillating 106 times. The criterion for assessing the results of vibration tests at resonant frequencies is similar to that specified in clause 3.4.3.7.

3.4.4. Testing of product samples - according to clause 3.4.1, listing 2.

3.4.4.1. The samples are subjected to vibration similarly to paragraphs. 3.4.2, 3.4.3.1-3.4.3.3, in accordance with the vibration impact parameters given in the technical documentation for this product: type of vibration; frequency range (divided into frequency bands); vibration acceleration; time of exposure to vibration in each frequency band and in the entire range as a whole.

3.4.4.2. A sample is considered to have passed the vibration strength test if, after exposure to vibration loads, it has not lost its tightness and a visual inspection does not reveal mechanical damage (cracks, destruction) of its elements.

3.5. Impact test method

3.5.1. The bellows compensator or seal assembly is installed on the stand in accordance with Appendix 7, fig. 7. Products intended for use on liquid media ah, must be filled with imitator working environment(Wednesday).

The feasibility of using special devices, equipment and boundary conditions simulators is determined by the testing department, based on design features, overall dimensions and weight of the tested products, if the requirements are not established by the normative and technical documentation for these products.

3.5.2. When installing an SC or UP sample on a stand, it must be ensured that the center of mass of the product (complete with equipment) is aligned with the axis of action of the shock pulse of the stand. The permissible deviation is established in accordance with the documentation for the testing equipment (stand).

3.5.3. Tests are carried out by applying shock loads in the axial and transverse directions specified in the technical documentation for this product, characterized by:

1) numerical value of impact acceleration (m/s2);

2) pulse duration (ms);

3) the number of impacts.

3.5.4. The acceleration sensor must be installed in the central part of the bench's load table so that its axis coincides with the direction of the impact.

3.5.5. After each impact, it is necessary to check the fastening of the product on the stand table, as well as inspect the product for timely detection of cracks and damage. After completion of the impact tests, the sample is checked for tightness.

3.5.6. SK and UP samples, which cannot be tested on test benches under specified shock loads (due to large mass, overall dimensions or design features), in agreement with the customer (main consumer), developer and parent testing organization, it is allowed to test by simulating impact impacts with other loads (for example, water hammer, static movement, etc.), provided that in terms of the level of stresses that arise when they are applied in the bellows shell and the elements of the limiting reinforcement, they are equivalent to the specified impact loads.

Note. Tests are carried out in accordance with industry methods. Calculations of loading parameters and stress state of the SK (UP) bellows must be attached to the test report.

3.5.7. A sample is considered to have passed the impact resistance test if, after exposure to impact loads (or loads simulating an impact), it does not lose its tightness and visual inspection does not reveal damage (cracks and destruction) of its elements.

3.6. Test methodology to confirm the probability of failure-free operation

3.6.1. Tests to confirm the FBG with a given confidence probability are carried out on stands that provide the necessary types and amplitudes of movements under the influence of internal (external) hydraulic pressure equal to Ru.

3.6.2. Depending on the type of SC (UP) and the type of movement established by the program, the assembled products are installed on the stand in accordance with Appendix 7, drawing. 8-16.

Note. Before testing, protective covers must be removed.

3.6.3. Tests should be carried out at a movement frequency of no more than 40 cycles per minute. The deviation of the test pressure from that specified by the test program should not be more than 5%.

The test system must provide:

measurement of the pressure of the test medium (MPa) and the value of the amplitude of displacement (mm, degree);

registration of the number of cycles worked;

possibility of external inspection of the product during testing.

3.6.4. Confirmation of the FBG must be carried out by test operating time Ni, the numerical value of which should not be less than 1.15 of the numerical value of the assigned operating time Nn with the number of failures equal to zero: Ni ³ 1.15Nn.

Notes:

1. The numerical value of the test operating time Ni is established by the developer of the SK (UP) in the normative and technical documentation for the product by calculation according to the methodology in force in the industry, depending on the initial quantitative indicators (probability of failure-free operation, confidence probability, coefficient of variation or the value of the average square deviation, the accepted law of distribution of time to failure and the number of samples subjected to testing).

2. When conducting periodic tests of products used for repair purposes, confirmation of the FBG must be carried out by test operating time, the numerical value of which should not be less than the numerical value of the assigned operating time, with the number of failures equal to zero: N and ³ Nн.

3.6.5. The samples are considered to have passed the tests, and the probability of failure-free operation of a batch of manufactured products is confirmed if the samples tested by operation have not lost their tightness and have no mechanical damage.

3.7. Leak test procedure

3.7.1. Testing of SC and UP for tightness should be carried out using mass spectrometric, hydrostatic or bubble methods.

3.7.2. The method (method) of tightness control is established by the design documentation for the product, taking into account the provisions and requirements of industry normative and technical documentation, and the threshold sensitivity of the control system is established by the technical documentation for this product.

3.7.3. In general, the following ranges are established for the threshold sensitivity of leakage monitoring systems depending on the nominal pressure PN of the products:

more than 5-10-2 to 5, l-µm/Hg. st./s - Ru f 1.0 MPa (10 kgf/cm2);

more than 5-10-3 to 5-10-2, l-µm/Hg. st./s - Ru St. 1.0 (10) to 4.0 (40) inclusive, MPa (kgf/cm2);

more than 5-10-5 to 5-10-3, l-µm/Hg. st./s - Ru > 4.0 MPa (40 kgf/cm2).

3.7.4. The following methods of leakage control can be used.

Mac spectrometric method - control methods:

helium or vacuum chamber;

helium dipstick;

helium blowing;

hydrostatic method - compression hydraulic method of control;

bubble control method - control methods:

soaping (application of a polymer composition);

compression (immersion in liquid).

Note. Other methods that do not reduce the requirements for tightness and ensure a given level of threshold sensitivity of the control system must be agreed upon with the customer (main consumer) and the product developer.

3.7.5. When testing SC or CP by methods that involve creating an excess pressure of the test medium inside the product, the samples must be protected from stretching.

3.7.6. The surface of the bellows and welds connecting the bellows to the fittings must be free of traces of rust, oil, emulsion and other contaminants, as well as paint and varnish coatings.

Before testing the tightness of products using the mass spectrometric method, their surfaces and internal cavities are dried from water and other liquid media. The drying mode (temperature, duration) must be set by the technological process, and the maximum temperature value should not exceed 423 K (150 °C).

3.7.7. The sample is considered to have passed the leak test if there was no pressure drop inside the sample, and the penetration of the test medium (control liquid or gas) through the walls of the sample structure (including the connections of its elements) did not exceed the standards established by the design documentation.

3.8. Weight control technique

3.8.1. Control of the weight of the SC and UP is carried out by weighing the products on scales. Types of scales should be determined by the technical documentation for products depending on the area of application of the products, their overall dimensions, nominal weight values and its permissible deviations.

3.8.2. Only dry samples with pre-separated transport and installation fasteners and accessories that are not included in the design of the product during its operation are subject to weighing.

3.8.3. When weighing, the product being controlled must be installed on the scale platform in such a way that the center of mass of the product is at vertical axis relatively coincided with the center of the scale platform.

3.8.4. The results of monitoring the mass of samples of serially produced products are considered positive if the actual value of the mass of the products meets the requirements of the normative and technical documentation for this product.

4. ORDER OF PROCESSING AND REGISTRATION OF TEST RESULTS

4.1. Test data processing

4.1.1. Processing of test data consists of carrying out calculations and calculations, as well as analyzing and comparing the obtained values of parameters and characteristics with their values specified in the technical specifications for this product, taking into account maximum deviations.

4.1.2. Processing of test data must be carried out by testing department personnel.

4.2. Registration of test results

4.2.1. Based on the test (inspection) results, test (inspection) reports are drawn up. A separate protocol is drawn up for each monitored parameter or characteristic.

Note. It is allowed to draw up one protocol to document the results of several tests (inspections).

4.2.2. Test reports should generally include:

1) type of test (in accordance with Table 2) - in the header of the protocol;

2) name, symbol and designation of products;

3) serial numbers of the tested samples;

4) name of the enterprise - manufacturer of the samples;

5) date of drawing up the protocol;

6) controlled parameters and characteristics;

7) place of testing (name of the enterprise or organization that conducted the testing);

8) symbol of bench equipment;

9) designation of the document (program, methodology, program and methodology) in accordance with which the tests were carried out;

10) the period of time during which the tests were carried out;

11) test data, including: test conditions and modes; data of the current measurement of parameters (if necessary) and the values of the measured quantities at the control measurement points; obtained final values of controlled parameters and characteristics, etc.;

12) information on the results of visual inspection of samples during testing and after their completion, indicating the location and nature of detected damage and destruction;

13) results of weighing (weight control) of samples;

14) results of measuring rigidity characteristics;

15) results of the vibration strength test in the form of a conclusion: “Passed the test” or “Failed the test as a result...”;

16) results of tests of samples for impact resistance in the form of a conclusion: “Passed the test” or “Failed the test as a result of...”;

17) sample test data (test operating time Ni; presence or absence of failed samples; number of failed samples (if any) and the number of cycles they had accumulated by the time of failure) and test results to verify (confirm) the probability of failure-free operation (FBO) in the form of a conclusion on the compliance of samples with the requirements of the normative and technical documentation for these products in terms of non-failure operation;

18) results of tests of samples for tightness in the form of a conclusion: “Passed the test” or “Failed the test as a result of...”, indicating the control method and information about the threshold sensitivity of the control system;

19) comments on design documentation, draft normative documentation for products and a conclusion on the technical level and quality of products (for prototypes).

4.2.3. In general, test reports should be accompanied by:

1) tabular and (or) graphic material by definition of rigidities;

2) calculations of loading parameters and stresses in the bellows - when simulating a shock load (if they are not included in the technical documentation for this product);

3) calculation of equivalent test modes when checking the probability of failure-free operation (in case of absence in the technical documentation for a given product);

4) calculation of the numerical value of the test operating time Ni (with the number of failures equal to zero) for tests to verify FBGs (in the absence of an indication in the technical documentation for this product);

5) photographs of damage (if any) caused by vibration, shock and (or) cyclic loads.

Note. The photographs are included as a separate appendix to the test materials.

4.2.4. Protocols of interdepartmental and departmental acceptance tests are signed by the head of the testing unit and members (member) of the commission.

4.2.5. Protocols of state acceptance tests conducted by GOGIP or its basic testing units are signed by the head of the testing unit.

4.2.6. Protocols of qualification, periodic and other types of tests are signed by: the head of the testing department; person responsible for testing; representative of the customer* (main consumer) and the state supervisory authority, if necessary.

* Customer representative at the company that conducted the tests.

4.2.7. Each test report must have a designation containing: the conventional code of the enterprise that conducted the tests (a four-digit letter code included in the structure of the designation code according to GOST 2.201); the last two digits of the year of drawing up this protocol; serial number of the protocol (in the year it was compiled).

Test report designation structure:

Example. IYANSH.91.011

4.2.8. The rules for drawing up protocols and other test documents must comply with those set out in Appendix 3, clause 2.6.

The procedure for recording, storing and handling test documents is given in Appendix 8.

ANNEX 1

Information

TERMS USED IN THIS STANDARD AND EXPLANATIONS TO THEM

Table 3

	Explanation
Tests	According to GOST 16504
Scope of tests
Test object
Test sample
Prototype
Test data
Test results
Test report
Test program
Test method
Test conditions
Test equipment
Control tests
State tests
Interdepartmental tests
Departmental tests
Acceptance tests
Qualification tests
Acceptance tests
Periodic testing
Preliminary tests
Type tests
Leading organization for state testing of products
Testing department
Basic testing unit of the parent organization
Controlled batch of products	A batch of a product of a specific standard size that is subject to control (testing) or from which samples are taken for testing
Typical representative of a group of homogeneous products	A specific standard size of a product selected (assigned) from a given group of homogeneous products, the test results of which are distributed to the entire group of homogeneous products
Bellows compensator	According to GOST 25756
Bellows seal
Types of SC (UP)
Limiting reinforcement
Connecting fittings
Options and specifications SK, UP:	According to GOST 25756
hardness, including
axial stiffness (Cl)
angular stiffness (Cg)
shear stiffness (Cd)
axial stroke (l)
angular stroke (g)

deformation cycle of the bellows compensator (seal)
vibration strength	According to GOST 24346
impact resistance	The ability of the SK, UP design to withstand the destructive effects of impact loads
tightness	The property of the SK, UP design to prevent gas or liquid exchange between media separated by the walls of the structure
loss of tightness	According to GOST 25756
buckling
probability of failure-free operation	According to RD 50-650 (GOST 27.002)
operating time
assigned operating time
Conditional pressure Ru	According to GOST 356
Test pressure Rpr

APPENDIX 2

Mandatory

TEST PROCEDURE

1. Acceptance tests

1.1. Acceptance tests (departmental, interdepartmental, state) are organized by the enterprise - the product developer.

1.2. In the general case, the acceptance committee includes representatives of: the enterprise (organization)-customer (main consumer) - the chairman; developer enterprise - deputy chairman; manufacturer; enterprise - developer of the object of application; representative of the state supervisory authority, if necessary.

1.3. Enterprises (organizations) notify the developer enterprise in writing, upon his request, about sending their representatives to the acceptance committee.

1.4. The acceptance committee works under the leadership of the chairman, and in his absence - under the leadership of the deputy chairman.

1.5. Tests are carried out within the time frame determined by the schedule agreed upon with the testing department.

1.6. Testing units, as well as organizations, must be certified for the right to conduct tests in the manner established by the USSR State Standard.

1.7. The developer company provides for the acceptance committee the necessary conditions work.

1.8. The commission is responsible for:

1) objectivity of conclusions and conclusions;

3) timing and quality of preparation of materials for the commission based on test results.

1.9. The commission has the right:

1) require additional information about samples submitted for testing;

2) invite specialists from other specialized organizations (enterprises) for consultation;

3) take direct part in the tests;

4) in technically justified cases, count the results of previously conducted product quality checks as test results;

6) assign qualification tests in cases of insufficient confirmation of parameters and characteristics during acceptance tests;

7) accept as indisputable the documents of the parent organization for state testing or its basic testing units;

8) suspend testing in cases of violation of safety rules or non-compliance of testing or measuring equipment with the test program (methodology), until these violations are eliminated;

9) stop testing in cases of non-compliance of the parameters and characteristics obtained during testing with the requirements of the documentation and resume them after considering issues with interested organizations (enterprises) and making an agreed decision on further performance of work.

1.10. All decisions of the acceptance committee are documented in protocols indicating the officials present at the committee meetings. Test reports are drawn up in accordance with clause 4.2.

1.11. When participating in the work of the USSR Register commission, its representative signs the minutes of the commission’s plenary meetings. At the end of the commission’s work, a representative of the USSR Register draws up a “USSR Register Act,” which is an integral part of the acceptance committee’s materials. At the same time, his signature is not provided for in the acceptance committee act.

1.12. Each member of the commission, including the chairman and his deputy, has the right to express in writing his dissenting opinion on a particular issue considered by the commission. A special opinion must be considered when approving the materials of the acceptance committee.

1.13. The execution of test reports must be carried out in accordance with Appendix 3, clause 2.2.

2. Qualification and periodic tests

2.1. Conducting qualification and periodic tests is organized by the manufacturer of the product with the participation of a representative of the customer (main consumer) and the state supervisory authority, if necessary.

2.2. In the case of testing at an enterprise (organization) that is not a manufacturer, the tests are carried out by the testing department of this enterprise (organization), certified in the manner established by the State Standard of the USSR, with the participation of a customer representative at this enterprise (organization) and the state supervisory authority, if necessary.

2.2.1. Tests are carried out within the time frame determined by the schedule agreed upon with the testing department. The schedule is drawn up by the person appointed responsible for the tests.

2.2.2. Based on the test results, the testing department issues test results to the manufacturer in the form of protocols.

2.3. Test reports are drawn up in accordance with clause 4.2.

Registration of test reports - in accordance with Appendix 3, paragraphs. 2.3, 2.4.

3. Acceptance tests

3.1. Acceptance tests are carried out by the technical control service of the manufacturer, and in cases specified when ordering, by a representative of the customer (main consumer) or a representative of the state supervisory authority. In this case, the acceptance of products by the technical control service precedes the acceptance of products by the customer (main consumer) or a representative of the state supervisory authority.

3.2. The basis for acceptance of products is a notification of their readiness provided by the product manufacturer.

3.3. Based on the results of acceptance, the documents provided for by the regulations on the acceptance of products for industrial and technical purposes are drawn up, and a passport is filled out.

3.4. Compliance with the customer’s special conditions specified when ordering products is noted in the documents for its acceptance.

PROCEDURE FOR EXECUTION, PRESENTATION AND APPROVAL OF DOCUMENTS COMPLETED BASED ON TEST RESULTS

1. Documents drawn up based on test results

In general, the documents compiled based on the results of testing prototypes and mass-produced products include:

1) test reports with attachments;

2) test report (conclusion - during arbitration tests).

2. Requirements for the design and approval procedure for test documents

2.1. The procedure for drawing up test reports is according to clause 4.2.

2.2. The procedure for registration, submission and approval of acceptance test reports

2.2.1. Based on the results of reviewing the documents submitted to the commission (Table 1), the latter draws up an act. Registration of acts of the interdepartmental (departmental) acceptance commission - in accordance with Appendix 4, registration of acts of the state acceptance commission - in accordance with Appendix 5.

2.2.2. The act of the interdepartmental (departmental) commission is signed by the members of the commission, and the act is approved by the chairman of the commission.

2.2.3. The act of the state acceptance commission is signed by the chairman and members of the commission. The act is approved by the organization that approved the composition of the commission.

2.2.4. If state tests are carried out by the basic testing unit of the parent organization or the parent organization for state tests, then the test reports and appendices to them state commission submitted by these testing units or the parent organization.

2.2.5. The chairman of the commission sends documents drawn up based on the results of the work of the state acceptance commission for approval to the organization that appointed the commission, with a letter signed by himself and the signature of the head of the enterprise (organization) that conducted the tests. The period for consideration and approval of documents is no more than 15 days.

Note. Documents are sent unbound in one (first) copy.

2.2.6. After approval of documents according to paragraphs. 2.2.2, 2.2.5 of this appendix, the documents are returned to the company that developed the IC (UP) for registration, making copies and distributing them to interested enterprises (organizations).

2.2.7. Acts of acceptance committees according to paragraphs. 2.2.2 and 2.2.3 of this appendix are subject to registration (assignment of the next serial number in the year the act was drawn up) at the developer enterprise.

Registration of test reports is carried out after their approval.

2.2.8. Making copies of documents is permitted in any way that ensures unambiguous reading of the documents. Sets of copies of documents must be bound and have a soft cardboard cover with a label indicating: the name of the topic, the designation of the technical documentation for the product, the number and date of approval of the acceptance test report.

2.2.9. The developer company leaves the original copy of the documents (the first typewritten) for storage, and sends the remaining copies (copies) within 10 days from the date of receipt of the approved copy of the documents:

to the customer (main consumer) - 1 copy;

the lead developer of a specific type of equipment, integral part which is SK or UE (in the case of testing components) - 1 copy;

to the manufacturer - 1 copy.

Note. The need to send materials to other organizations (enterprises) must be specified in the acceptance test report.

2.2.10. After completing the acceptance test documents, the company that developed the SC (UP) must perform the following activities:

approval and registration of technical documentation for products in the manner established by GOST 1.3;

adjustment of design and technological documentation based on the results of acceptance tests in the manner established by GOST 2.503.

2.3. The procedure for registration, submission and approval of qualification test reports

2.3.1. Based on the results of qualification tests, the manufacturer draws up a report in which it indicates:

1) name, type and designation of products in accordance with the main design documentation;

2) designation of technical documentation for the product;

3) serial numbers of samples;

4) date of preparation of the document;

5) test objectives;

6) name of the enterprise that conducted the tests;

7) name of the enterprise - developer of the insurance system (UP);

8) the period of time during which the tests were carried out;

9) compliance of SK or UP samples submitted for testing with the requirements of the design documentation and technical documentation for the product;

10) name and designation of the test program and methodology in accordance with which the samples were tested;

11) the results of the tests with a conclusion on the compliance of product samples with the requirements of the design documentation and technical documentation for the product;

12) elimination of product defects (CD) identified by the acceptance committee and specified in the act;

13) the state of readiness of the manufacturer for serial production of this product in a given volume;

Test reports with relevant annexes are attached to the act.

2.3.2. The qualification test report is signed by: a representative of the manufacturer (the person responsible for conducting the tests), a representative of the customer (the main consumer) at the manufacturer and a representative of the state supervisory authority, if necessary.

2.3.3. The qualification test report is approved by the head (deputy head) of the manufacturer of the SC, UP.

Registration of qualification test reports is carried out by the manufacturer.

2.4. The procedure for registration (except for items 12-14, 16, clause 2.3.1), submission and approval of periodic product testing reports is similar to that set out in clause 2.3 of this appendix.

2.5. The procedure for registration and submission of documents (conclusions) of other types of tests (examinations) of finished products (according to clause 1.5) - in accordance with the approved Charter (Regulations) of the enterprise (organization) that conducted the tests (examination), agreed in the prescribed manner with the Gosstandart bodies , and the procedure in force at this enterprise (organization).

2.6. Rules for document preparation

2.6.1. The text part of the documents (test reports and accompanying materials, test report and other documents) is typewritten and drawn up in accordance with general requirements to text documents in accordance with GOST 2.105, on sheets of white paper in A4 format in accordance with GOST 2.301 without a frame, main inscription and additional columns to it.

2.6.2. Quality of execution of documents according to paragraphs. 2.6.1 and 2.6.2 of this annex must provide the ability to make multiple copies or duplicates of them.

2.6.3. The name of the test object in all documents of one set and in the headings of the documents must be the same as the name of the product in the technical specifications for the product and the main design document. Product designation is in accordance with GOST 2.201.

STANDARD FORM OF THE ACT

I APPROVED

Chairman of the acceptance committee

position and name of the organization (enterprise)

___________________________________________

_______________________________________

ACT No. _______

acceptance ________________________________________________________________ commission

interdepartmental, departmental

on this topic ____________________________________________________________________

topic name

name and type of product

designation of the draft normative documentation for the product;

___________________________________________________________________________

date of document preparation

___________________________________________________________________________

interdepartmental, departmental

acceptance committee consisting of:

surname, initials, position, organization (enterprise)

__________________________________________________________________________

surname, initials, position, organization (enterprise)

appointed by order (instruction) on _____________________________________

Name

From __________________No. ________________

organization (enterprise) date

conducted acceptance tests of prototypes ______________________________

Name

_________________________________________________________________________

products and their designation in accordance with the main design document;

Developed

factory sample numbers

Name

manufacturer.

Tests were carried out from ___________________ to ___________________

date date

at the stand(s) of the enterprise (organization) _________________________________

Name

according to the program and methodology ___________________________________________________.

document designation

1. Summary of test results for all points of acceptance tests ________________________________________________________________

are given: 1) assessment of the results obtained for each type of test in the form

__________________________________________________________________________

conclusions on the compliance of the controlled parameter (characteristics)

__________________________________________________________________________

requirements of the draft normative and technical documentation and (or) the need to adjust the requirements established in them

__________________________________________________________________________

numerical values of parameters (characteristics);

__________________________________________________________________________

2) information about noted defects and data on their elimination (if any);

__________________________________________________________________________

3) assessment of the conformity of testing equipment, as well as measuring instruments

__________________________________________________________________________

and testing requirements of the program and methodology).

2. Conclusion on design documentation ___________________________________

information is presented

__________________________________________________________________________

on the degree of compliance of samples with the requirements of the design documentation and proposals for its adjustment for

__________________________________________________________________________

production of a pilot batch in preparation for serial production

3. Conclusion on the sufficiency of the tests carried out and the compliance of the samples with the requirements of the draft scientific and technical documentation ___________________________________________________

__________________________________________________________________________

4. Brief assessment of the technical and economic efficiency of products at a limit price and beneficial effect ___________________________________________________

__________________________________________________________________________

5. Brief assessment of the technical level and quality of products according to the technical level and quality map __________________________________________________________

__________________________________________________________________________

1) on the possibility (expediency) of putting products into serial production (without qualification tests or after them) ________________________________________________________________

__________________________________________________________________________

2) on assigning the design documentation the letter “01” (“A”) after its adjustment (if necessary) based on the results of acceptance tests

__________________________________________________________________________

3) on the possibility of further use of samples that have passed the tests (or an indication of their write-off) _______________________________________________

__________________________________________________________________________

7. Instruction on approval of the draft technical specifications

__________________________________________________________________________

names of enterprises and organizations to which the act should be sent -

__________________________________________________________________________

in accordance with Appendix 3)

__________________________________________________________________________

Deputy Chairman of the Commission __________________ ____________________

Personal signature Signature decryption

Members of the commission: __________________ ____________________

STANDARD FORM OF THE ACT

I APPROVED

Name of organization date and number

Order (Decision)

ACT No. ________

acceptance state commission on the topic

_________________________________________

topic name

___________________________________________________________________________

name and type of product; designation of the project NTD;

___________________________________________________________________________

serial numbers of samples tested

___________________________________________________________________________

date of document preparation

State acceptance committee consisting of:

Chairman ________________________________________________________________

surname, initials, position, organization (enterprise)

Deputy Chairman _____________________________________________________

surname, initials, position, organization (enterprise)

and members: ___________________________________________________________________

surname, initials, position, organization (enterprise)

___________________________________________________________________________

surname, initials, position, organization (enterprise)

appointed by Order (Instruction) ________________________________________

name of company

from _______________________ No. _________________, in the period from____________________

date date

__________ reviewed the results of state tests of prototypes

___________________________________________________________________________

product name and designation in accordance

___________________________________________________________________________

with the main design document;

Developed

factory sample numbers

by the enterprise ____________________________________, manufactured by the enterprise

Name

And accepted by the technical control service

Name

manufacturer.

Tests were carried out from ____________________ to ___________________

date date

at the stand(s) of the enterprise (organization) ___________________________________

Name

according to the program and methodology _____________________________________________________.

document designation

Other requirements for the content of the document are in accordance with Appendix 4.

1) on the possibility (expediency) of putting products into serial production and (or) supplying them for export ____________________________________

___________________________________________________________________________

Attachments: 1) acceptance test reports with attachments.

2) USSR Register Act (if necessary).

After approval, send out the act:

___________________________________________________________________________

names of enterprises and organizations that should be

___________________________________________________________________________

an act has been sent - in accordance with Appendix 3)

___________________________________________________________________________

Chairman of the commission __________________ _____________________

Personal signature Signature decryption

Deputy Chairman of the Commission __________________ _____________________

Personal signature Signature decryption

Members of the commission: __________________ _____________________

Personal signatures Decoding of signatures

LIST OF MEASURING INSTRUMENTS USED WHEN CHECKING THE PARAMETERS AND CHARACTERISTICS OF BELLOWS COMPENSATORS AND SEALS

1. Dial indicators IC of the first accuracy class - for measuring linear movements.

2. Optical quadrants of types KO-1M and KO-3M - for measuring angular movements.

3. Dynamometers of types DOR and DOS of the second accuracy class - for measuring forces.

4. Pressure gauges of types MOSH and MIT are not lower than the first accuracy class - for measuring hydraulic pressure.

5. KD type accelerometer sensors - for measuring vibration displacements (vibration accelerations).

6. Accelerometer sensors - for measuring the amplitudes of shock accelerations.

7. Electronic frequency meters of types Ch3-33, Ch3-36, etc. - for measuring vibration frequency.

8. Electronic or mechanical watches of various types - to measure the current time of the test process (in hours, minutes, seconds).

9. Electronic or mechanical counters - for recording the number of loading cycles of SK and UP samples by static movement (the number of cycles of operation of the stand).

Determination of the angular stiffness of universal type SK and UP

1 - dynamometer; 2 - power body; 3 - beam; 4 - optical quadrant; 5 - bellows compensator; 6 - hinge; 7 - clamp; 8 - stand; 9 - earring

Determination of shear rigidity of SK and UP universal and shear types

1 - bellows compensator; 2 - screed (technological or standard); 3 - indicator; 4 - equipment; 5 - earring; 6 - dynamometer; 7 - rod of the power body; 8 - fastening bolt; 9 - clamp

SK and UP tests for vibration strength

in axial direction

1 - vibration transducer table; 2 - rigid equipment; 3 - bellows compensator; 4 - accelerometer sensors; 5 - static unloading device for the movable vibration exciter system; A is the amplitude of movement of the vibration exciter table of the stand; A1, A2 - amplitudes of vibration movements of the bellows corrugation elements

Tests of SK and UP for impact resistance

position of the product when tested in the X-axis direction

position of the product when tested in the direction of the Y (Z) axes

1 - axis of action of the shock pulse of the stand; 2 - technological flanges; 3 - limiting fittings SK, UP (if available); 4 - bellows compensator; 5 - load table of the stand; 6 - boundary conditions simulator; 7 - equipment

Tests of universal type SK and UP to confirm the probability of failure-free operation during compression-tension

1 - bellows compensator; 2 - bottom plug; 3 - top plug; 4 - intermediate flange; 5, 6 - screed; 7 - crossbar; 8 - earring; 9 - adapter; 10 - hydraulic cylinder rod; 11, 12 - flexible hose; 13 - pressure gauge; 14 - pump; 15, 16 - shut-off valve; 17 - safety valve; 18 - clamp; 19 - stand; 20 - limit switch; 21 - pressure bar; 22 - indicator; 23 - technological stand (installation)

Testing of universal unloaded SCs to confirm the probability of failure-free operation during compression-tension

1 - bellows compensator of unloaded type; 2 - bottom plug; 3 - top plug; 4 - earring; 5 - adapter; 6 - hydraulic cylinder rod; 7, 8 - flexible hose; 9 - pressure gauge; 10 - pump; 11, 12 - shut-off valve; 13 - safety valve; 14 - stand; 15 - limit switch; 16 - pressure bar; 17 - indicator; 18 - clamp

Tests of universal type SCs and CPs to confirm the probability of failure-free operation during bending (rotation)

1 - bellows compensator; 2 - bottom plug; 3 - top plug; 4 - hydraulic cylinder rod; 5 - hinge; 6 - fork; 7 - adapter; 8 - drive; 9, 10 - flexible hose; 11 - pressure gauge; 12 - pump; 13, 14 - shut-off valve; 15 - safety valve; 16 - clamp; 17 - stand; 18 - limit switch; 19 - pressure bar; 20 - optical quadrant

Testing of shear-rotary type SC to confirm the probability of failure-free operation during bending (rotation)

1 - bellows compensator; 2 - bottom plug; 3 - top plug; 4, 6 - earring; 5 - adapter; 7 - beam; 8 - hydraulic cylinder rod; 9, 10 - flexible hose; 11 - pressure gauge; 12 - pump; 13, 14 - shut-off valve; 15 - safety valve; 16 - clamp; 17 - stand; 18 - limit switch; 19 - pressure bar; 20 - optical quadrant

Test to confirm the probability of failure-free operation of rotary bellows compensators

1 - bellows compensator; 2 - bottom plug; 3 - top plug; 4 - fork; 5 - adapter; 6 - earring; 7 - hydraulic cylinder rod; 8, 9 - flexible hose; 10 - pressure gauge; 11 - pump; 12, 13 - shut-off valve; 14 - safety valve; 15 - clamp; 16 - stand; 17 - limit switch; 18 - pressure bar; 19 - optical quadrant

Testing of universal type SK and UP to confirm the probability of failure-free operation during shear

1 - bellows compensator; 2 - bottom plug; 3 - top plug; 4, 6 - earring; 5 - lanyard; 7 - adapter; 8 - drive; 9, 10 - flexible hose; 11 - pressure gauge; 12 - pump; 13, 14 - shut-off valve; 15 - safety valve; 16 - stand; 17 - limit switch; 18 - pressure bar; 19 - indicator; 20 - clamp

Testing of universal unloaded SCs to confirm the probability of failure-free operation during shear

1 - bellows compensator; 2 - bottom plug; 3 - top plug; 4, 6 - earring; 5 - lanyard; 7 - adapter; 8 - hydraulic cylinder rod; 9, 10 - flexible hose; 11 - pressure gauge; 12 - pump; 13, 14 - shut-off valve; 15 - safety valve; 16 - clamp; 17 - stand; 18 - limit switch; 19 - pressure bar; 20 - indicator

Testing of shear-rotary type SC to confirm the probability of failure-free operation during shear

Test to confirm the probability of failure-free operation of a shear-type SC (UP)

1 - bellows compensator; 2 - bottom plug; 3 - top plug; 4, 6 - earring; 5 - adapter; 7 - hydraulic cylinder rod; 8, 9 - flexible hose; 10 - pressure gauge; 11 - pump; 12, 13 - shut-off valve; 14 - safety valve; 15 - clamp; 16 - stand; 17 - limit switch; 18 - pressure bar; 19 - indicator

PROCEDURE FOR RECORDING, STORING, HANDLING AND DISTRIBUTION OF TEST DOCUMENTS

1. Accounting, storage and circulation of documents

1.1. The originals (first typewritten copies) of the kits, including the test report (test conclusions), test reports and appendices to them, are subject to registration and storage in the technical documentation department (TD) or the technical documentation bureau (BTD) of the enterprise that registered the act (Appendix 3 ).

1.2. The original set of documents is stored in folders in an unbound form for the possibility of making repeated copies or making a duplicate, if the document type does not require a special accounting and storage procedure.

General rules for accepting original documents for storage, accounting, storage and circulation - in accordance with GOST 2.501.

1.3. Accounting, storage and circulation of copies of documents is carried out in accordance with the rules established by GOST 2.501. Storage of documents at development enterprises is carried out in the NTD file for these products.

1.4. The storage period for test documents is 5 years, but not less term periodic testing.

2.3. The transfer of original acceptance test documents is carried out by decision of the Ministry (department) of the subordination of the enterprise that conducted the tests.

INFORMATION DATA

1. APPROVED AND ENTERED INTO EFFECT by Resolution of the USSR State Committee for Product Quality Management and Standards dated October 25, 1990 No. 2686

2. INTRODUCED FOR THE FIRST TIME

3 REFERENCE REGULATIVE AND TECHNICAL DOCUMENTS

	Item number, application
	APPENDIX 3; 2.2.10
GOST 2.105-79	APPENDIX 3; 2.6.1
GOST 2.116-84	1.11; listing 7
GOST 2.201-80	4.2.7, Appendix 3, 2.6.5
GOST 2.301-68	APPENDIX 3, 2.6.1
GOST 2.304-81	APPENDIX 3, 2.6.2
GOST 2.501-88	APPENDIX 8, 1.2, 1.3
GOST 2.503-90	APPENDIX 3, 2.2.10
GOST 12.4.026-76
GOST 27.002-89
	ANNEX 1
GOST 16504-81
GOST 18321-73	ANNEX 1
GOST 24346-80
GOST 24555-81	ANNEX 1
GOST 25756-83

Document's name:
Document Number:	8.568-97
Document type:	GOST R
Receiving authority:	Gosstandart of Russia
Status:	Inactive
Published:
Acceptance date:	November 10, 1997
Start date:	01 July 1998
Expiration date:	01 August 2018
Revision date:	01 June 2008

GOST R 8.568-97 State system ensuring the uniformity of measurements (GSI). Certification of testing equipment. Basic provisions (with Amendment No. 1)

GOST R 8.568-97

Group T80

STATE STANDARD OF THE RUSSIAN FEDERATION

State system for ensuring the uniformity of measurements

CERTIFICATION OF TESTING EQUIPMENT

Basic provisions

State system for ensuring the uniformity of measurements.
Verification of testing equipment. General principles

Text Comparison of GOST R 8.568-97 with GOST R 8.568-2017, see the link.
- Database manufacturer's note.
____________________________________________________________________

OKS 03.120.20
17.020
OKSTU 0008

Date of introduction 1998-07-01

Preface

1 DEVELOPED by the All-Russian Research Institute of Metrological Service (VNIIMS) of the State Standard of Russia

INTRODUCED Technical Committee on standardization TC 53 "General norms and rules of the GSI"

2 ADOPTED AND ENTERED INTO EFFECT by Resolution of the State Standard of Russia of November 10, 1997 N 364

3 This standard implements the norms of the Law of the Russian Federation "On Ensuring the Uniformity of Measurements" and the Law of the Russian Federation "On Certification of Products and Services" *
________________
Federal Law of the Russian Federation "On technical regulation". - Database manufacturer's note.

4 INTRODUCED FOR THE FIRST TIME

5 EDITION (February 2007) with Change No. 1, adopted in October 2002 (IUS 1-2003), Amendment (IUS 4-2004)

1 area of use

This standard establishes the basic provisions and procedure for the certification of testing equipment.

2 Normative references

This standard uses references to the following standards:

GOST 2.601-2006 Unified system of design documentation. Operational documents

GOST 16504-81 System of state testing of products. Testing and quality control of products. Basic terms and definitions

GOST R 8.563-96 * State system for ensuring the uniformity of measurements. Measurement techniques
________________
* In the territory Russian Federation the document is not valid. GOST R 8.563-2009 is valid, hereinafter in the text. - Database manufacturer's note.

GOST R 51672-2000 Metrological support of product testing for the purpose of confirming conformity. Basic provisions

3 Definitions

This standard uses terms with corresponding definitions in accordance with GOST 16504 and GOST R 51672, including:

3.1 test equipment: A testing tool, which is a technical device for reproducing test conditions.

3.2 testing equipment certification: Determining the standardized accuracy characteristics of testing equipment, their compliance with the requirements of regulatory documents and establishing the suitability of this equipment for operation.

3.3 test tool: Technical device, substance and (or) material for testing.

3.4 test conditions: A set of influencing factors and (or) operating modes of an object during testing.

3.5 testing organization: An organization that, in accordance with the established procedure, is entrusted with testing certain types of products or conducting certain types of tests.

3.6 testing department: A division of an organization (enterprise) that is entrusted by the management of the latter with conducting tests for its needs.

3.7 reproducibility of test results- according to GOST R 51672.

Sections 2, 3

4 General provisions

4.1 The main purpose of certification of test equipment is to confirm the ability to reproduce test conditions within permissible deviations and to establish the suitability of using test equipment in accordance with its intended purpose.

4.2 When commissioning in this testing department, the testing equipment is subject to initial certification.

Note - Test equipment, the primary certification of which was carried out in this testing department in accordance with GOST 24555-81 * before the date of entry into force of this standard, is not subject to repeated primary certification.
________________
* The document is not valid on the territory of the Russian Federation. GOST R 8.568-97 is in force. - Database manufacturer's note.

(Changed edition, Amendment No. 1).

4.3 During operation, testing equipment is subject to periodic certification at time intervals established in the operational documentation for the testing equipment or during its initial certification.

Note - Time intervals for periodic certification can be established based on the results of monitoring the condition of the test equipment during its operation; These intervals may vary for different parts of the test equipment.

4.4 In case of repair or modernization of test equipment, work on the foundation on which it is installed, movement of stationary test equipment and other reasons that may cause changes in the characteristics of reproducing test conditions, the test equipment is subject to re-certification.

4.5 For certification of testing equipment used for mandatory product certification, when testing products for compliance mandatory requirements state standards and in the production of products supplied under contracts for government needs, including for the needs of the defense and security sector, measuring instruments of approved types must be used, copies of measuring instruments must be verified, measurement methods must be certified in accordance with GOST R 8.563 .

When certifying testing equipment for testing products used in other areas, verified or calibrated measuring instruments must be used.

4.6 Testing, verification and calibration of measuring instruments used as testing instruments or as part of testing equipment are carried out in accordance with the regulatory documents of the state system for ensuring the uniformity of measurements.

The types of measuring instruments built into testing equipment used to test products supplied for the needs of the defense and security sector must be approved in the manner established for this sector.

Note - Measuring instruments built into testing equipment must be of approved types, undergo initial verification and be subject to periodic verification during the operation of the testing equipment, if it is possible to remove them for verification. If the design of the testing equipment does not allow the removal of the built-in measuring instrument for its periodic verification, then the equipment designer must provide for the possibility of its verification during operation without dismantling, for example, using portable verification equipment, etc.

4.5, 4.6 (Changed edition, Amendment No. 1).

4.7 Test equipment transported during use is subject to initial certification only when it is put into operation in accordance with 4.2 of this standard.

5 Primary certification of testing equipment

5.1 Primary certification of testing equipment consists of an examination of the operational and design documentation (if the latter is available), on the basis of which the installation of the testing equipment was carried out, experimental determination of its technical characteristics and confirmation of the suitability of using the test equipment.

5.2 Primary certification of testing equipment is carried out in accordance with current regulatory documents on methods for certification of a certain type of testing equipment and (or) according to programs and methods for certification of specific equipment.

Programs and methods for certification of testing equipment used in testing products supplied for the needs of the defense and security sector must undergo metrological examination in the manner established for this sector.

5.3 The objects of primary certification are specific test equipment with standardized technical characteristics for reproducing test conditions and, if available, information support (for example, computer software and (or) operating algorithms).

5.2, 5.3 (Changed edition, Amendment No. 1).

5.4 Technical characteristics of testing equipment to be determined or controlled during initial certification are selected from among the standardized technical characteristics established in the technical documentation and determining the ability to reproduce test conditions in specified ranges with permissible deviations within a specified time interval.

5.5 The initial certification of testing equipment is carried out by a commission appointed by the head of the enterprise (organization) in agreement with the state scientific metrological center and (or) the state metrological service body (32 GNIIII MO RF), if their representatives must participate in the work of the commission. The commission includes representatives:

- divisions of the enterprise (organization) conducting tests on this testing equipment;

- metrological service of the enterprise (organization), the division of which conducts product testing;

State scientific metrological centers and (or) state metrological service bodies when using testing equipment to test products for the purpose of its mandatory certification or testing for compliance with mandatory requirements of state standards or in the production of products supplied under contracts for government needs (for the needs of the defense and security sector - 32 GNIIII MO RF);

- the customer at the enterprise in the case of using testing equipment to test products supplied under contracts for the needs of the defense and security sector.

(Changed edition, Amendment No. 1).

5.5.1 Primary certification of testing equipment (with the exception of testing equipment used for testing products supplied for the needs of the defense and security sector) can be carried out on a contractual basis by head and base organizations of the metrological service accredited in accordance with PR 50.2.008 (according to the scope of their accreditation ).

Primary certification of testing equipment used for testing products supplied for the needs of the defense and security sector can be carried out on a contractual basis by organizations accredited in accordance with MI 2647.

(Introduced additionally, Amendment No. 1).

5.6 Testing departments submit testing equipment for primary certification with technical documentation and technical means necessary for its normal operation and for carrying out primary certification. The submitted technical documentation must include:

- operational documents in accordance with GOST 2.601, including a form if available (for imported equipment - operational documents of the manufacturer, translated into Russian);

- program and methodology for primary certification of testing equipment;

- a methodology for periodic certification of test equipment during operation, if it is not set out in operational documents.

The program and methodology for the initial certification of testing equipment can be developed by the department conducting the testing.

Note - The methodology for the initial certification of test equipment has no limitation on the validity period, and if it meets the requirements for the certified test equipment in terms of accuracy and reproducibility, it can be used by the testing department in the future to certify the same type of test equipment for a similar purpose, regardless of the timing of its introduction into exploitation.

(Changed edition, Amendment No. 1).

5.7 During the initial certification process, the following is established:

- the ability to reproduce external influencing factors and (or) operating modes of the test object established in documents on test methods for specific types of products;

- deviations of the characteristics of the test conditions from the standardized values;

- ensuring the safety of personnel and the absence of harmful effects on the environment;

A list of characteristics of testing equipment that are checked during periodic certification of equipment, methods, means and frequency of its implementation.

5.8 The results of the initial certification are documented in a protocol.

The contents of the protocol for the initial certification of testing equipment are given in Appendix A.

The protocol for the initial certification of testing equipment is signed by the chairman and members of the commission who conducted the initial certification.

5.9 If the results of the initial certification are positive, based on the primary certification protocol, a certificate is issued in the form given in Appendix B.

The certificate is signed by the head of the enterprise (organization) in whose department the initial certification of the testing equipment was carried out.

5.10 Negative results of the initial certification are indicated in the protocol.

5.11 Information about the issued certificate (number and date of issue), the obtained values of the characteristics of the testing equipment, as well as the period of subsequent periodic certification of the testing equipment and the frequency of its implementation during operation are entered into a form or a specially created journal.

6 Periodic certification of test equipment

6.1 Periodic certification of testing equipment during its operation is carried out to the extent necessary to confirm compliance of the characteristics of the testing equipment with the requirements of regulatory documents for test methods and operational documents for the equipment and its suitability for further use.

The range of verified characteristics of the testing equipment and the scope of operations during its periodic certification are established during the initial certification of the equipment, based on the standardized technical characteristics of the equipment and those characteristics of specific products that are determined during testing.

6.2 Periodic certification of testing equipment during its operation is carried out by employees of the department in which the equipment is installed, authorized by the head of the department to perform this work, and representatives of the metrological service of the enterprise.

6.3 The results of periodic certification of testing equipment are documented in a protocol, the contents of which are given in Appendix B. The protocol with the results of periodic certification is signed by the persons who carried out the certification. The protocol is approved by the head of the enterprise (organization).

(Changed edition, Amendment No. 1).

6.4 If the results of the periodic certification are positive, a corresponding mark is made in the passport (form), and a tag is attached to the testing equipment indicating the date of the certification and the period for the subsequent periodic certification.

6.5 If the results of periodic certification are negative, the protocol indicates the measures necessary to bring the technical characteristics of the test equipment to the required values.

7 Re-qualification of test equipment

7.1 Re-certification of test equipment after repair or modernization (see 4.4 of this standard) is carried out in the manner established for the initial certification of test equipment in Section 5 of this standard.

(Changed edition, Amendment No. 1; Amendment).

7.2 Re-certification of test equipment after work on the foundation on which it is installed, or movement of stationary test equipment, or caused by other reasons that may cause changes in the characteristics of reproducing test conditions, is carried out in the manner established in 6.2-6.4 of this standard.

(Changed edition, Amendment No. 1).

APPENDIX A (recommended). Protocol for initial certification of testing equipment

A.1 The protocol for the initial certification of testing equipment contains the following data:

A.1.1 Composition of the commission, indicating the name, position, name of the enterprise (organization).

A.1.2 Basic information about the testing equipment [name, type, serial (inventory) number, name of the manufacturer].

A.1.3 Verifiable characteristics of test equipment.

A.1.4 Conditions for initial certification: temperature, humidity, illumination, etc.

A.1.5 Documents used for initial certification: certification program and methodology, standards, technical specifications, operational documents, etc.

A.1.6 Characteristics of measuring instruments used for initial certification of testing equipment:

Name;

type;

serial (inventory) number;

manufacturer;

information about verification (calibration).

Note - Instead of the contents of the protocol according to A.1.5 and A.1.6, relevant documents can be attached.

A.1.7 Results of initial certification

A.1.7.1 Visual inspection[completeness, absence of damage, functioning of components, assemblies, availability of valid documents for verification (calibration) methods of built-in or included measuring instruments].

A.1.7.2 Test equipment performance values obtained during initial certification.

A.1.8 Conclusion of the commission on the compliance of the testing equipment with the requirements of regulatory documents for testing equipment and testing methods for specific types of products and the possibility of using testing equipment for their tests.

A.1.9.1 List of standardized characteristics that are determined during periodic certification of test equipment during its operation.

A.1.9.2 Frequency of periodic certification of testing equipment during its operation.

CERTIFICATE N ____________


Date of issue_______________
Makes sure that
		name and designation of the test
equipment, serial or inventory number
belonging to
	name of the enterprise (organization), division, center
based on the results of the initial certification, protocol No. _________________ dated ________, found to be suitable
for use in testing
			Name of product		name and designation of documents
on test methods (if necessary)
Frequency of periodic certification							(months, years)

Certificate issued
	name of the enterprise (organization) that issued the certificate
Head of the enterprise (organization) that issued the certificate				Personal signature (seal)		Decoding signatures

APPENDIX B (recommended). Protocol for periodic (re-) certification of testing equipment

B.1 The protocol for periodic (re-) certification of testing equipment contains the following data:

B.1.1 Basic information about the testing equipment [name, type, serial (inventory) number, name of the manufacturer].

B.1.2 Verifiable characteristics of test equipment.

B.1.3 Conditions for periodic (repeated) certification: temperature, humidity, illumination, etc.

B.1.4 Results of periodic (repeated) certification

B.1.4.1 External inspection [absence of damage, functioning of components, assemblies, availability of operational documents for testing equipment and documents confirming information about verification (calibration) of built-in or included measuring instruments].

B.1.4.2 Characteristics of measuring instruments used for periodic (re-) certification of testing equipment [name, type, serial (inventory) number, name of the manufacturer], and information about their verification (calibration).

B.1.4.3 Test equipment performance values obtained during previous qualification.

Note - Instead of the contents of the protocol according to B.1.4.2 and B.1.4.3, relevant documents can be attached.

B.1.4.4 Values of test equipment characteristics obtained during periodic (repeated) certification.

B.1.5 Conclusion on the compliance of the testing equipment with the requirements of regulatory and operational documents for testing equipment and testing methods for specific types of products.

APPENDIX D (for reference). Bibliography

APPENDIX D
(informative)

PR 50.2.008-94 State system for ensuring the uniformity of measurements. The procedure for accreditation of parent and base organizations of the metrological service government agencies administration of the Russian Federation and associations of legal entities

MI 2647-2001 State system for ensuring the uniformity of measurements. The procedure for accreditation of organizations for the right to certify testing equipment used in the interests of defense and security*

APPENDIX D (Changed edition, Amendment No. 1).

Electronic document text
prepared by Kodeks JSC and verified against:

official publication
M.: Standartinform, 2008

GOST R 8.568-97 State system for ensuring the uniformity of measurements (GSI). Certification of testing equipment. Basic provisions (with Amendment No. 1)

Document's name:
Document Number:	8.568-97
Document type:	GOST R
Receiving authority:	Gosstandart of Russia
Status:	Inactive
Published:	official publication M.: Standartinform, 2008
Acceptance date:	November 10, 1997
Start date:	01 July 1998
Expiration date:	01 August 2018
Revision date:	01 June 2008

GOST R 8.568-97 State system for ensuring the uniformity of measurements (GSI). Certification of testing equipment. Basic provisions (with Amendment No. 1)

Certification of testing equipment is carried out on the basis of the Law of the Russian Federation “On Ensuring the Uniformity of Measurements” and is regulated by the requirements of GOST 8.568 “GSI. Certification of testing equipment. Basic provisions", as well as current standards and rules of metrological support.

In accordance with the requirements of GOST 8.568, when certifying testing equipment, only measuring instruments of an approved type must be used that have passed the appropriate state tests in accordance with PR 50.2.009 - 94. If the certified testing equipment is intended for testing objects falling within the scope of the Law of the Russian Federation “On Ensuring the Uniformity of Measurements” ", they must be verified according to PR 50.2.006 - 94. If the certified equipment is intended for testing in the interests of security and defense, measuring instruments that have passed state tests and approved in accordance with GOST RV 8.560 must be used. In all other cases, the measuring instruments used for certification of testing equipment must be calibrated, as required by the Law of the Russian Federation “On Ensuring the Uniformity of Measurements”.

The measurement techniques used during certification must be standardized or certified according to GOST 8.563. The use of uncertified methods is allowed only if the accuracy parameters of the obtained measurement results are not known in advance.

In accordance with the requirements of GOST 8.568, any testing equipment is subject to certification.

In the text of the specified GOST, terms and definitions are not given, but references are given to GOST 16504 “SGIP. Testing and quality control of products. Basic terms and definitions." This regulatory document establishes the terms and definitions of basic concepts used in science, technology and production in the field of testing and product quality control.

The terms established by this standard are mandatory for use in documentation of all types of scientific, technical, educational and reference literature.

There is one standardized term for each concept. The use of synonymous terms of a standardized term is prohibited.

Terms marked with an asterisk (*) are approximate equivalents. Let's look at the main ones.

Tests* - experimental determination of quantitative and (or) qualitative characteristics of the properties of the test object as a result of the impact on it, during its operation, during modeling of the object and (or) impacts.

The most important feature of any test is acceptance based on its results certain decisions. Another feature of testing is the setting of certain test conditions (real or simulated), which is understood as a set of impacts on the object and modes of operation of the object.

Determination of the characteristics of an object during testing can be carried out both while the object is functioning and in the absence of functioning, in the presence of influences, before or after their application.

Test conditions are a set of influencing factors and (or) operating modes of an object during testing.

Test conditions include external influencing factors, both natural and artificially created, as well as internal influences caused by the functioning of the object (for example, heating caused by friction or the passage of electric current), and operating modes of the object, methods and place of its installation, installation, fastenings, speed of movement, etc.

Normal test conditions* - test conditions established by the regulatory and technical documentation for this type products.

Test object* - products being tested. The main feature of a test object is that, based on the results of its tests, one or another decision is made regarding this object: about its suitability or defectiveness, the possibility of presentation for the next tests, the possibility of serial production, etc.

Test method - rules for applying certain principles and means of testing.

Test program* is an organizational and methodological document, mandatory for implementation, establishing the object and goals of the tests, types, sequence and volume of experiments carried out, procedure, conditions, place and timing of tests, provision and reporting on them, as well as responsibility for provision and conduct tests.

Test methodology* is an organizational and methodological document that is mandatory, including a test method, test tools and conditions, sampling, algorithms for performing operations to determine one or more interrelated characteristics of the properties of an object, a form for presenting data and assessing the accuracy and reliability of the results, safety and environmental requirements.

Testing tool* - technical device (substance) and (or) material for testing.

The concept of testing means covers any technical means, used in testing. This includes, first of all, test equipment, which refers to means of reproducing test conditions. Test instruments include measuring instruments, both built into the testing equipment and used during testing to measure certain characteristics of an object or control test conditions. Test facilities should also include auxiliary technical devices for securing the test object, recording and processing the results.

Test equipment is a testing tool, which is a technical device for reproducing test conditions. Since the term “test equipment” as a testing means for reproducing test conditions fully covers all interpretations of the concept “test bench”, then, accordingly, the test bench is a test equipment.

Certification of testing equipment - determination of the standardized accuracy characteristics of testing equipment. Their compliance with the requirements of regulatory and technical documentation and establishing the suitability of this equipment for operation.

The accuracy of test results is a property of tests, characterized by the closeness of test results to the actual values of the characteristics of an object, under certain test conditions.

Test report - a document containing necessary information about the test object, the methods used, means and test conditions, test results, as well as a conclusion on the test results, drawn up in the prescribed manner.

Testing unit is a unit of an organization entrusted by the management of the latter with conducting tests for its needs.

In accordance with GOST 8.568, the main purpose of certification of test equipment is to confirm the ability to reproduce test conditions within permissible deviations and to establish the suitability of using test equipment in accordance with its purpose.

This suggests that during the certification process (especially the primary one), it is necessary to determine the ranges of conditions recreated by the testing equipment (test modes, loads, etc.) and the actual values of the errors in their setting in accordance with the purpose of the test equipment and the specified test conditions.

One of the features of GOST 8.568 is that it requires initial certification when testing equipment is put into operation in a given testing department, regardless of whether it was previously certified. Test equipment that has previously passed primary certification is subject to periodic certification during operation. In case of repair, modernization, foundation work or any other work that may affect the technical characteristics of the testing equipment, it is subject to re-certification. This GOST emphasizes that for the certification of test equipment used in for mandatory certification purposes products, when testing products for compliance with mandatory requirements of state standards and in the production of products supplied under contracts for state needs, measuring instruments of approved types must be used in accordance with PR 50.2.009, which must be verified, measurement techniques must be certified in accordance with the requirements of GOST 8.563.

If the testing equipment is intended for testing products ordered by the Ministry of Defense of the Russian Federation, the measuring instruments used must be tested and type approved in accordance with GOST RV 8.560.

It should be borne in mind that the previously used term “accuracy characteristics” of testing equipment, established in GOST 16504, is not used in GOST 8.568: it is replaced by the term “technical characteristics” of testing equipment, although it is indicated that they must be within established limits, i.e. e. the error values of these characteristics must be specified.

Primary certification of testing equipment

Primary certification of testing equipment consists of examination of operational and design documentation (if available), on the basis of which the installation of test equipment was carried out, experimental determination of its technical characteristics and confirmation of the suitability of using this equipment in accordance with its purpose. Primary certification is carried out in accordance with current regulatory documents on certification methods for a certain type of testing equipment and (or) according to programs and methods for certification of specific equipment. The program and methodology (one document program-methodology - PM is allowed) for the primary certification of testing equipment are developed by the organization (enterprise) conducting this certification. Since the objects of primary certification are specific test equipment with a certain list of standardized technical characteristics, then from this list it is necessary to reasonably select the characteristics to be determined or controlled. In this case, it is necessary to pay Special attention for those technical characteristics that are not measured (not controlled) during testing.

For example, if an electrical pulse generator is used as test equipment, then it is necessary to determine the shape of the specified pulse, the coefficient of nonlinear distortion, the range of amplitude and frequency of the output signal, since the value of frequency and amplitude is measured by built-in measuring instruments. These tools make it possible to measure the characteristics of the output signal, but they cannot provide information about it. with what accuracy can a signal be specified, i.e. do not determine the capabilities of the testing equipment based on the accuracy characteristics of the established mode. Thus, when certifying this test equipment, it is necessary to determine the actual values of the frequency and amplitude ranges, the waveform of the signal, the error in setting the frequency and amplitude, and the stability of the output signal. Naturally, the built-in measuring instruments must be verified and have valid appropriate marks about this verification (calibration).

The initial certification of testing equipment is carried out by a commission appointed by the head of the organization (enterprise) that owns the certified equipment. The commission includes representatives:

Divisions of the enterprise (organization) conducting tests using this test equipment;

The metrological service of the enterprise (organization) whose unit conducts the tests;

State scientific metrological centers and (or) state metrological service bodies when using testing equipment intended for testing products for the purpose of its mandatory certification or for compliance with the mandatory requirements of state standards in the production of products supplied under contracts for state needs.

GOST certified testing site. Certification of testing equipment. State standard of the USSR

1. TEST REQUIREMENTS

2. TEST PROGRAM

3. TEST PROCEDURE

4. ORDER OF PROCESSING AND REGISTRATION OF TEST RESULTS

TERMS USED IN THIS STANDARD AND EXPLANATIONS TO THEM

TEST PROCEDURE

PROCEDURE FOR EXECUTION, PRESENTATION AND APPROVAL OF DOCUMENTS COMPLETED BASED ON TEST RESULTS

STANDARD FORM OF THE ACT

STANDARD FORM OF THE ACT

LIST OF MEASURING INSTRUMENTS USED WHEN CHECKING THE PARAMETERS AND CHARACTERISTICS OF BELLOWS COMPENSATORS AND SEALS

PROCEDURE FOR RECORDING, STORING, HANDLING AND DISTRIBUTION OF TEST DOCUMENTS

1 area of ​​use

2 Normative references

3 Definitions

4 General provisions

5 Primary certification of testing equipment

6 Periodic certification of test equipment

7 Re-qualification of test equipment

APPENDIX A (recommended). Protocol for initial certification of testing equipment

APPENDIX B (recommended). Protocol for periodic (re-) certification of testing equipment

APPENDIX D (for reference). Bibliography

GOST R 8.568-97 State system for ensuring the uniformity of measurements (GSI). Certification of testing equipment. Basic provisions (with Amendment No. 1)

Primary certification of testing equipment

1 area of use