GOST R 50.05.01-2018 PDF

Full title and description

ГОСТ Р 50.05.01-2018. Система оценки соответствия в области использования атомной энергии. Оценка соответствия в форме контроля. Унифицированные методики. Контроль герметичности газовыми и жидкостными методами — national (Russian) standard that defines unified procedures for leak‑tightness (hermeticity) control of equipment and piping used in nuclear energy facilities using gas and liquid methods; includes requirements for methods, means (including measurement instruments), organization of control, evaluation and documentation of results.

Abstract

This standard establishes unified methodologies for performing hermeticity (leak) control by gas and liquid techniques on primary metal, welded joints and clad deposits of equipment and pipelines of nuclear installations and related systems. It specifies test conditions, classes of hermeticity and sensitivity, recommended methods (helium, halogen, pneumatic, hydraulic, fluorescent penetrant and others), preparation and acceptance criteria, and requirements for recording and reporting results.

General information

• Status: Active (in force / действует).
• Publication date: Approved 02 February 2018; came into effect 01 March 2018.
• Publisher: Approved by the Federal Agency on Technical Regulation and Metrology (Rosstandart); published in 2018 (commercial publishing/redistribution commonly via Standartinform and standards libraries).
• ICS / categories: 27.120 — Nuclear energy engineering (atomic energy / nuclear power technology).
• Edition / version: ГОСТ Р 50.05.01-2018 (2018 edition / first issued 2018).
• Number of pages: 46 pages (printed/electronic text length as held in standards databases).

Scope

The standard applies to leak‑tightness control of base metal, welded joints and surfacing (claddings) of equipment and pipelines of nuclear energy installations and other elements of nuclear facilities. It covers both local and total hermeticity assessment, gas and liquid control methods (including helium methods, halogen sniffing, pneumatic and hydrostatic pressure tests, fluorescent/hydraulic techniques and penetrant methods), selection of test medium, test pressures and procedural requirements for preparation, execution and evaluation of tests. The document is intended to be used together with design and regulatory documentation and other sectoral rules governing safe operation of nuclear equipment.

Key topics and requirements

• Classification of hermeticity classes and corresponding permissible leakage ranges and sensitivity classes of control systems.
• Specified gas and liquid test methods and their suitable application cases (helium vacuum/chamber, helium sniffing, halogen probe, pneumatic, hydrostatic, fluorescent/hydraulic, penetrant methods, etc.).
• Requirements for preparation of items under test (drying, evacuation, conditioning) and for limiting volumes and connections to minimize dead volumes and leakage sources.
• Recommended test pressures, hold times and temperature considerations for different methods and classes of hermeticity.
• Criteria for selection and calibration of measuring instruments and leak detectors, and assignment of sensitivity classes.
• Rules for documenting test procedures, results, nonconformity evaluation and acceptance records (technical control cards and reporting forms).
• Guidance when standard methods cannot be applied due to design features — alternative procedures referencing related standards (for example ГОСТ Р 50.04.07 for certain methodological solutions).

Typical use and users

Primary users are designers, test engineers and quality/acceptance personnel at nuclear power plants and other nuclear facilities, specialist testing laboratories, contractors performing fabrication, installation and commissioning of reactor equipment and piping, and regulatory/inspection bodies responsible for conformity assessment in the field of atomic energy. The standard is used during manufacture, installation, pre‑commissioning and in‑service checks where hermeticity of safety‑related components is critical.

Related standards

Part of a set of standards for conformity assessment in the field of atomic energy (the ГОСТ Р 50.05 / ГОСТ Р 50.04 series). Related and referenced documents include other unified methodologies in the same series (for example ГОСТ Р 50.05.02‑2018, ГОСТ Р 50.05.03‑2018, etc.), and sectoral normative documents and PNAE rules used in nuclear industry practice. The standard also cross‑references methodological and safety standards for testing and nondestructive control used in nuclear energy.

Keywords

hermeticity; leak testing; leak tightness; gas methods; liquid methods; helium testing; halogen detector; pneumatic test; hydrostatic test; fluorescent/hydraulic test; sensitivity class; technical control card; nuclear energy; conformity assessment.

FAQ

Q: What is this standard?

A: ГОСТ Р 50.05.01-2018 is a Russian national standard setting unified methodologies for leak‑tightness (hermeticity) control by gas and liquid methods within the conformity assessment system for the use of atomic energy. It was approved by Rosstandart on 02 February 2018 and entered into force on 01 March 2018.

Q: What does it cover?

A: It covers procedures, allowable test regimes, classes of hermeticity and sensitivity of control systems, selection and calibration of instruments, preparatory operations (evacuation, drying, filling), execution and evaluation of gas and liquid leak tests for equipment and piping of nuclear installations, and documentation of results.

Q: Who typically uses it?

A: Designers, fabrication and installation contractors, commissioning and test engineers, nondestructive testing and leak detection laboratories, plant technical control departments and regulatory/inspection personnel involved with nuclear power plants and other atomic energy facilities.

Q: Is it current or superseded?

A: As of its approval and official effective date the standard is in force (active). Users should verify current status in official Rosstandart or national standards databases for any subsequent amendments or replacements; no broad supersession was indicated at time of publication.

Q: Is it part of a series?

A: Yes — it is part of the ГОСТ Р 50.05 / 50.04 family of standards addressing conformity assessment (control and testing methodologies) in the field of atomic energy; related documents in the series include multiple other 2018-era unified methodology standards.

Q: What are the key keywords?

A: Hermeticity, leak testing, gas methods, liquid methods, helium testing, halogen probe, sensitivity class, nuclear energy, conformity assessment.