GOST 30242-97

• gost-30242-97.pdf (363.77 KiB)
  ГОСТ 30242-97

GOST 30242−97 Defects of connections at welding of metals by melting. Classification, designation and definition

GOST 30242−97

Group В05

INTERSTATE STANDARD

DEFECTS OF CONNECTIONS AT WELDING OF METALS BY MELTING

Classification, designation and definition

Imperfections in metallic fusion welds. Classification, designation and definitions

ISS 25.160.40
AXTU 0072

Date of introduction 2003−01−01

Preface

1 DEVELOPED by the Institute of electric them. E. O. Paton of the National Academy of Sciences of Ukraine; Intergovernmental technical Committee for standardization MTK 72 «welding and allied processes"

SUBMITTED to the State Committee of Ukraine for standardization, Metrology and certification

2 ADOPTED by the Interstate Council for standardization, Metrology and certification (minutes N 11 dated April 23, 1997)

The adoption voted:

3 this standard is fully consistent with ISO 6520−82 «Classification of defects in welds in welding of metals by melting (with explanations)"

4 Resolution of the State Committee of the Russian Federation for standardization and Metrology dated March 2, 2001 N 115-St inter-state standard GOST 30242−97 introduced directly as state standard of the Russian Federation from January 1, 2003

5 INTRODUCED FOR THE FIRST TIME

1 Scope

This standard specifies the classification, definitions and notations of defects in welds, heat-affected zones and the base metal when welding metals fusion.

2 Classification of defects

2.1 Defects in the welding of metals by melting are formed as a result of violations of requirements of normative documents of welding consumables, preparation, Assembly and welding of the connecting elements, heat and mechanical treatment of welded joints and structure in General.

2.2 In this standard, the defects classified into the following six groups:

1 — cracks;

2 — cavity, pores;

3 — solid inclusions;

4 — neoplasene and lack of fusion;

5 — violation of the bead;

6 — other defects not included in the above group.

3 Name, identifying and marking defects

The name, identification and marking of defects is given in table 1.

In the following table:

— in column 1 — the three digit numerical designation of each of the defect or the four-digit designation of varieties;

— in column 2 — letter symbol, used in collections of reference radiographs from the International Institute of welding (IIW);

— in column 3 — the name of the defect in Russian, English and French;

— in column 4 — definition and/or descriptive text;

— in column 5 — the drawings, supplementary to the definition if necessary.


Table 1

The text of the document is verified by:
the official publication of the
M.: IPK Publishing house of standards, 2001