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GB/T 7233.2-2023Steel castings - Ultrasonic testing - Part 2: Steel castings for highly stressed components (English PDF)

铸钢件超声检测第2部分：高承压铸钢件

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

May 23, 2023

Implementation date

December 1, 2023

Scope

GB/T 7233.2-2023 is the English-translated version of 铸钢件超声检测第2部分：高承压铸钢件.

GB/T 7233.2-2023 is the Chinese standard "Steel castings - Ultrasonic testing - Part 2: Steel castings for highly stressed components".

Its scope clause reads: This document specifies the general requirements and testing methods for ultrasonic testing of high pressure steel castings: This document applies to ultrasonic testing of high pressure steel castings that have undergone grain refinement heat treatment and whose wall thickness does not exceed 600mm: for wall thickness For steel castings larger than 600mm, if there is no special requirement, it can be implemented by reference: This document does not apply to austenitic and austenitic-ferritic duplex stainless steels: Martensitic stainless steels may be implemented as a reference:. Its clauses include terms and definitions.

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Document preview — GB/T 7233.2-2023

National Standard of the People's Republic of China

ICS: 77.040.20
Classification: J31

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
Introduction
1 Scope
2 Normative references
3 Terms and Definitions
4 General requirements
5 Detection method
Appendix A (Informative) The structural changes of this document compared with ISO 4992-2:202
Appendix B (informative) Technical differences between this document and ISO 4992-2:2020 and their reasons
Appendix C (Normative) Detection Resolution of the Complete Equipment (Instrument/Probe Combination)
Appendix D (informative) Sound beam diameter
Appendix E (Informative) Display Types Produced by Typical Defects

1 Scope

This document specifies the general requirements and testing methods for ultrasonic testing of high pressure steel castings:

This document applies to ultrasonic testing of high pressure steel castings that have undergone grain refinement heat treatment and whose wall thickness does not exceed 600mm: for wall thickness

For steel castings larger than 600mm, if there is no special requirement, it can be implemented by reference:

This document does not apply to austenitic and austenitic-ferritic duplex stainless steels: Martensitic stainless steels may be implemented as a reference:

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text: Among them, dated references

For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document:

GB/T 9445 Qualification and certification of non-destructive testing personnel (GB/T 9445-2015, ISO 9712:2012, IDT)

GB/T 12604:1 Nondestructive Testing Terminology Ultrasonic Testing (GB/T 12064:1-2020, ISO 5577:2017, MOD)

GB/T 19799:1 Nondestructive Testing Ultrasonic Testing No: 1 Calibration Test Block (GB/T 19799:1-2015, ISO 2400:2012, IDT)

GB/T 19799:2 Nondestructive Testing Ultrasonic Testing No: 2 Calibration Test Block (GB/T 19799:2-2012, ISO 7963:2006, IDT)

GB/T 27664:1 Performance and inspection of ultrasonic testing equipment for non-destructive testing - Part 1: Instruments

GB/T 27664:2 Performance and inspection of ultrasonic testing equipment for non-destructive testing - Part 2: Probes

GB/T 27664:3 Performance and inspection of ultrasonic testing equipment for non-destructive testing - Part 3: Combined equipment

GB/T 39239 Characterization and quantification of discontinuities in ultrasonic nondestructive testing (GB/T 39239-2020, ISO 16827:

2012, MOD)

GB/T 39240 General Rules for Nondestructive Testing Ultrasonic Testing (GB/T 39240-2020, ISO 16810:2012, MOD)

GB/T 39242 Ultrasonic testing sensitivity and range setting for non-destructive testing (GB/T 39242-2020, ISO 16811:

2012, MOD)

3 Terms and Definitions

GB/T 12604:1, GB/T 39240, GB/T 39242, GB/T 39239 and the following terms and definitions apply to this document:

3:1

Point-like defect point-likedefect

A defect whose size is smaller than or equal to the beam diameter:

Note: The dimensions in this document refer to the size of the defect in the direction of length, width and wall thickness:

[Source: GB/T 7233:1-2023,3:1] […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 39 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 9445-2015Non-destructive testing - Qualification and certification of personnels

ISO 9712 · GB/T 12604 · GB/T 12064 · ISO 5577 · GB/T 19799 · ISO 2400 · ISO 7963 · GB/T 27664

Cited by

Similar standards

GB 38031-2025|GB/T 7233.2|GB/T 7233.2-2010|GB/T7233.2-2023|GB/T 7233|GB/T 1|GB/T 9445|GB/T 9445-2015

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