GOST 30242-97 PDF

Full title and description

GOST 30242-97 — "Imperfections in metallic fusion welds. Classification, designation and definitions" (Russian: "Дефекты соединений при сварке металлов плавлением. Классификация, обозначение и определения"). The standard establishes names, definitions, numeric and letter designations for weld defects in fusion welding, including weld metal, heat-affected zone (HAZ) and base metal.

Abstract

GOST 30242-97 provides a structured classification of imperfections found in fusion-welded joints, groups defects into main categories (cracks; cavities/pores; solid inclusions; lack of fusion/penetration; weld shape deviations; and other defects), and specifies conditional numeric and letter designations (aligned with International Institute of Welding / IIW nomenclature). It is intended as a reference for identification, recording and communication of welding discontinuities in inspection and documentation.

General information

• Status: Withdrawn / has lost force in the Russian Federation (listed as withdrawn in public standards catalogs).
• Publication date: Original designation: 30242-97 (1997); entered into force as a national/interstate standard 01 January 2003 (registration/adoption records show 1997 adoption with introduction to national practice in 2003).
• Publisher: Adopted as an interstate (Mezhgosudarstvenny) standard; developed by the E. O. Paton Electric Welding Institute and adopted through national standard bodies (EASC / Gosstandart / national standards of participating states).
• ICS / categories: 25.160.40 (welded joints and welding).
• Edition / version: GOST 30242-97 (single edition / original text, with later editorial changes noted in some catalogs).
• Number of pages: 11 pages (PDF/national text length as published).

Scope

The standard defines classification, names, definitions and conventional designations for defects that occur in metallic fusion welds. It covers defects located in the weld metal, the fusion boundary, the heat-affected zone and the parent metal, and is intended for use when specifying inspection records, defect reporting and technical documentation related to welded joints.

Key topics and requirements

• Grouping of defects into six principal categories: 1) cracks; 2) cavities and pores; 3) solid inclusions; 4) lack of fusion and lack of penetration; 5) weld shape and profile deviations; 6) other defects not included above.
• Numeric three‑digit (with four‑digit variants for subtypes) and letter designations consistent with IIW/MIС (International Institute of Welding) reference codes for defect identification.
• Definitions and illustrative figures for typical defect types (microcracks, longitudinal/transverse cracks, gas pores, distributed porosity, slag inclusions, incomplete fusion/penetration, undercut, overlap, etc.).
• Guidance for use in inspection records and compatibility with related international classifications (the standard states correspondence with ISO/related documents).

Typical use and users

Primary users are welding engineers, quality and inspection personnel, NDT (non‑destructive testing) specialists, manufacturing and fabrication engineers, technical document authors, and standards organizations. The classification is used for defect reporting, quality acceptance criteria referencing (in conjunction with acceptance standards), inspection records, repair planning and training.

Related standards

Related normative documents include the ISO/IIW classification series (ISO 6520 and earlier ISO 6520-82), national welding and acceptance standards (other GOSTs for welding procedures and seam geometry), and nondestructive testing standards that reference defect types. The standard is frequently cited alongside standards on weld quality, welding procedure specification and NDT methods.

Keywords

welding defects; fusion welds; weld imperfections; classification; defect designation; heat-affected zone; weld inspection; GOST 30242-97; IIW; ISO 6520.

FAQ

Q: What is this standard?

A: GOST 30242-97 is an interstate (GOST) technical standard that provides a formal classification, definitions and conventional designations for imperfections found in metallic fusion welds.

Q: What does it cover?

A: It covers names, definitions, grouping and symbolic/numeric designations for weld defects occurring in weld metal, at the fusion boundary, in the heat-affected zone and in the base metal; it includes illustrations and subtype coding for common defect forms.

Q: Who typically uses it?

A: Welding engineers, QC/inspection personnel, NDT technicians, fabrication and construction inspectors, standards writers and organizations that document or communicate weld discontinuities.

Q: Is it current or superseded?

A: Public catalogs list GOST 30242-97 as withdrawn / having lost force in the Russian Federation (catalog entries indicate the standard was introduced into national practice in 2003 and later taken out of force; users should check national/regional standards registries for current replacements or incorporated revisions).

Q: Is it part of a series?

A: The classification aligns with international IIW/ISO defect-classification practice (ISO 6520 series and related IIW nomenclature) and is used together with other welding and NDT standards; it is not a multi-part GOST series itself but is commonly referenced alongside other welding GOSTs.

Q: What are the key keywords?

A: Cracks, pores, inclusions, lack of fusion, lack of penetration, weld profile defects, heat-affected zone, defect designation, weld inspection.