GOST 28697-90 PDF

Full title and description

GOST 28697-90 — "Programme and test methods of bellows compensators and seals. General requirements". The standard establishes the program and detailed methods for conducting control and acceptance tests of bellows (corrugated) compensators and metallic seals used in pressure-containing assemblies, including required test types, sequence, conditions and the format for recording results.

Abstract

This standard defines general requirements for preparing and executing test programs for bellows compensators and metallic seals during development and production. It covers types of tests (acceptance, qualification, periodic, arbitration), test parameters (strength, hermeticity, thermotolerance, stiffness, vibration), sample selection, instrumentation accuracy and the required documentation and reporting forms. The document is intended to ensure consistent, reproducible testing and formalized reporting of results.

General information

• Status: Active / in force (document marked as действующий in modern catalogs).
• Publication date: Introduced 01 January 1992 (approved 25 October 1990; designation year = 1990).
• Publisher: Adopted by the State Committee of the USSR for Product Quality Management and Standards (Государственный комитет СССР по управлению качеством продукции и стандартам).
• ICS / categories: ICS 17.120 (Metrology and physical phenomena) and related hydraulic/pneumatic system categories (catalog listings also show OKS/23.040.80).
• Edition / version: Original designation GOST 28697-90 (first issue; text reprints/reissues noted in commercial catalogs and reprints).
• Number of pages: Listed in commercial and standards databases as approximately 35–36 pages (varies by edition/format).

Scope

The standard applies to the program and methodology for control and acceptance testing of bellows-type compensators and metallic seals at the stages of design and production. It sets mandatory provisions for which tests to perform, the sequence and conditions for performing them, sample preparation and selection, measurement methods and the required forms for test protocols and reporting. It explicitly excludes preliminary and type tests that are to be carried out under special programs.

Key topics and requirements

• Classification of test types: acceptance, qualification, acceptance-delivery, periodic and arbitration tests.
• Detailed methods for strength (pressure) tests, hermeticity (leak) tests, thermotolerance/heat resistance tests, stiffness and amplitude of static displacements, and vibration testing.
• Requirements for sample selection, marking (indexing of specimens), and number of specimens for different test types.
• Specification of test media and conditions (water commonly used as test medium; permissible test-pressure regimes and temperature regimes for thermotolerance).
• Instrumentation and measurement accuracy (use of second-class measuring instruments for main dimensions, calibration/attestation of test facilities).
• Documentation and reporting: prescribed forms and order of preparation, presentation and approval of test protocols and acceptance acts.

Typical use and users

Primary users are manufacturers and designers of bellows compensators and metallic seals, test laboratories and quality control departments, certification and regulatory bodies, and procurement or engineering teams who need to verify component conformity to required mechanical and sealing performance. The standard is used to prepare test programs, create working test procedures and generate formal test reports.

Related standards

GOST 28697-90 references and is used alongside other normative documents for testing and metrology, including standards such as ГОСТ 16504 (general testing terminology and rules) and ГОСТ 2.105‑95 (design/documentation references). It is part of the family of standards covering testing methods for pressure-containing components and hydraulic systems.

Keywords

bellows compensator, corrugated compensator, metallic seal, test program, acceptance tests, qualification tests, hermeticity, thermotolerance, stiffness, vibration testing, test protocol, GOST 28697-90.

FAQ

Q: What is this standard?

A: GOST 28697-90 is a national (USSR-origin) standard that specifies the program and methods for testing bellows compensators and metallic seals — providing general mandatory requirements for test planning, procedures and documentation.

Q: What does it cover?

A: It covers the types of tests to be performed (acceptance, qualification, periodic, arbitration), detailed test procedures for strength, leak-tightness, thermal resistance, stiffness and vibration, specimen selection and preparation, instrumentation accuracy and the required reporting forms. It does not replace special preliminary or type-test programs.

Q: Who typically uses it?

A: Manufacturers, test laboratories, quality assurance and certification bodies, design and R&D teams, and procurement/engineering specialists involved with pressure-containing compensators and seals.

Q: Is it current or superseded?

A: Catalogs and standards databases list GOST 28697-90 as currently in force (действует) and showing reprints/reissues in later catalogs; users should check national standards registries or national standards providers for any amendments or formal replacement notices before use.

Q: Is it part of a series?

A: It is part of the body of standards addressing testing and metrology for compensators, seals and hydraulic components and refers to other normative documents (e.g., ГОСТ 16504 for testing terminology and ГОСТ 2.105-95 for documentation rules). It is used together with product-specific normative-technical documentation for complete test programs.

Q: What are the key keywords?

A: Bellows compensator, metallic seal, test program, acceptance testing, qualification testing, hermeticity, thermotolerance, stiffness, vibration, test protocol, GOST 28697-90.