GOST R 50.05.04-2018 PDF

Full title and description

GOST R 50.05.04-2018 — Система оценки соответствия в области использования атомной энергии. Оценка соответствия в форме контроля. Унифицированные методики. Ультразвуковой контроль сварных соединений из стали аустенитного класса. (English title: Conformity assessment system for the use of nuclear energy. Conformity assessment in the form of examination. Unified procedures. Ultrasonic examination of austenitic steel welded joints.) Standard developed by Государственная корпорация по атомной энергии «Росатом» and introduced by Rosstandart; contains unified procedures, technical requirements and documentation rules for ultrasonic (UT) inspection of welded joints made from austenitic-class steels used in nuclear equipment and piping.

Abstract

This national standard defines unified ultrasonic inspection methods, equipment and calibration practices, scanning techniques and acceptance criteria for examination of welded joints in austenitic steels within the nuclear energy sector. It addresses special features of austenitic materials (anisotropy, scattering, structural noise), sets requirements for instrumentation, transducers and couplants, describes typical scanning procedures and sensitivity checks, and specifies reporting and documentation necessary for conformity assessment in production, installation and operation stages.

General information

• Status: Superseded / replaced by GOST R 50.05.04-2022 (see notes below).
• Publication date: 01 March 2018 (introduced by Rosstandart order dated 27 February 2018, No. 100-ст).
• Publisher: Federal Agency on Technical Regulating and Metrology (Rosstandart); printed/distributed by Standartinform (Moscow).
• ICS / categories: 27.120 — Nuclear power engineering; classification: conformity assessment / nondestructive testing (ultrasonic).
• Edition / version: 2018 (first edition). Note: a later edition/ replacement was published as GOST R 50.05.04-2022.
• Number of pages: 23 (physical description IV, 23 pages in the 2018 edition).

Scope

The standard applies to ultrasonic conformity-assessment control (inspection) of welded joints made of austenitic-class steels used in products, assemblies and pipeline systems for nuclear energy installations. It is intended for use during manufacture, installation (assembly) and operational maintenance to confirm weld integrity and to detect, characterize and document discontinuities that may affect safety or fitness-for-service. The document does not replace specific design or regulatory requirements where those impose additional limits; it is part of the unified conformity-assessment methodology for the nuclear industry.

Key topics and requirements

• Normative references and definitions related to ultrasonic NDT and nuclear conformity assessment.
• General requirements for inspection planning, qualification of procedures and personnel competency (references to personnel qualification rules).
• Requirements for ultrasonic equipment, calibration blocks, transducer types and frequency ranges suitable for austenitic steels.
• Calibration and sensitivity checks, reference standards and procedures for establishing detectability.
• Scanning techniques and probe movement schemes adapted for anisotropic, highly scattering austenitic weld metal and heat-affected zones.
• Signal evaluation methods, acceptance criteria and sizing practice for weld discontinuities in austenitic materials.
• Consideration and mitigation of structural noise and indications peculiar to austenitic metallurgy.
• Reporting, documentation, marking of inspected joints and requirements for inspection records supporting conformity assessment.
• Cross-references to related test methods and additional procedures (e.g., thickness measurement, cladding inspection) where applicable.

Typical use and users

Used by nuclear-industry organizations involved in manufacture, quality assurance, in-service inspection and commissioning of reactor components and primary-circuit piping: plant operators, fabrication shops, welding and NDT departments, independent inspection laboratories, regulatory bodies and Rosatom-affiliated institutes. Typical users include ultrasonic inspection engineers, welding engineers, NDT technicians, QA/QC managers and conformity-assessment specialists responsible for safety-significant welds in nuclear facilities.

Related standards

Part of the GOST R conformity-assessment series for nuclear energy. Closely related documents include other items in the 50.05.* family (for example GOST R 50.05.01, 50.05.02, 50.05.03, and personnel qualification rules such as GOST R 50.05.11). Normative references commonly cited include GOST R ISO 5577 (ultrasonic NDT vocabulary) and GOST R 55724 (ultrasonic methods for welded joints). Note: the 2018 item has been replaced by the 2022 revision (GOST R 50.05.04-2022), which updates and expands the unified procedures.

Keywords

ultrasonic testing, UT, nondestructive testing, austenitic steel, welded joints, weld inspection, conformity assessment, nuclear energy, Rosatom, Rosstandart, calibration, structural noise, NDT procedure

FAQ

Q: What is this standard?

A: GOST R 50.05.04-2018 is a Russian national standard establishing unified ultrasonic inspection procedures for welded joints made from austenitic-class steels within the conformity-assessment system for the use of nuclear energy.

Q: What does it cover?

A: It covers scope and application limits, normative references, equipment and calibration requirements, suitable transducers and scanning methods for austenitic welds, sensitivity and acceptance criteria, handling of structural noise, and reporting/documentation needed for conformity assessment during manufacture, installation and operation.

Q: Who typically uses it?

A: NDT engineers and technicians, welding and QA/QC personnel in fabrication shops and nuclear plants, independent inspection laboratories, conformity-assessment bodies and regulatory or oversight organizations involved with nuclear equipment and piping.

Q: Is it current or superseded?

A: The 2018 edition was introduced on 01 March 2018. It has been superseded by a later edition published as GOST R 50.05.04-2022 (approved in December 2022 and brought into effect by the relevant Rosstandart order; the 2022 edition became effective in practice on 01 March 2023). For current requirements consult the 2022 edition.

Q: Is it part of a series?

A: Yes. It is part of the GOST R conformity-assessment system documents for the field of atomic (nuclear) energy, a family of unified-method standards covering various NDT methods, testing and personnel qualification within nuclear conformity assessment.

Q: What are the key keywords?

A: Ultrasonic testing (UT), austenitic steel, welded joints, nondestructive testing, conformity assessment, nuclear energy, calibration, structural noise, inspection procedure, Rosstandart, Rosatom.