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GB/T 42606-2023Guidelines for repair of stationary pressure vessels (English PDF)

固定式压力容器修理导则

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

May 23, 2023

Implementation date

May 23, 2023

Scope

GB/T 42606-2023 is the English-translated version of 固定式压力容器修理导则.

This document specifies the requirements for repairing stationary pressure vessels in service and the industrial piping connected to them.

The document applies to the repair of steel and graphite stationary vessels and piping listed in the special equipment catalogue; stationary vessels and piping in other metals may be repaired following it as a reference.

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Document preview — GB/T 42606-2023

National Standard of the People's Republic of China

ICS: 23.020.30
Classification: J 74

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

Preface
1 Scope
2 Normative references
3 Terms and Definitions
4 General requirements
5 Welding repairs
5.1 Welding gouging repair
5.2 Surfacing repair of outer wall
5.3 Seal welding repair
5.4 Repair of Welding Fixtures
5.5 Socket welding repair
5.6 Repair of welded plate with reinforced plug
5.7 Fillet welded plate repair
5.8 Surfacing and Repair Welding
5.9 Repair of threaded or plug-welded plugs
6 Mechanical Repair
6.1 Replacement of pressure-bearing parts
6.2 Freezing plugs
6.3 Thread repair
6.4 Metal removal
6.5 Flange repair and replacement
6.6 Mechanical Fixture Repair
6.7 Pipe straightening or bending
7 Inspection and testing
8 Document Management
Appendix A (Normative) Repair of Graphite Pressure Vessels A 1 Repair
Appendix B (Informative) Alternatives to Preheating Before Welding B 1 Overview
Appendix C (informative) Alternative methods for post-weld heat treatment C 1 Overview
Appendix D (informative) In-service welding of carbon steel pressure equipment D 1 Overview
Appendix E (informative) On-site heat treatment E 1 Overview
Appendix F (Informative) Welding Precautions for Chromium Molybdenum Steel Pressure Vessels F 1 Overview
Appendix G (Informative) Methods of Hot Disassembly and Half Disassembly of Bolts G 1 Overview
Appendix H (Informative) Overhaul of Shell and Tube Heat Exchangers H 1 Overview
References

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules for Standardization Documents" drafting.

1 Scope

This document specifies the in-service fixed pressure vessels (hereinafter referred to as "vessels") and the industrial pipelines connected to them (hereinafter referred to as "pipes") repair requirements.

This document is applicable to the repair of steel and graphite fixed vessels and pipelines in the "Special Equipment Catalog", and other metal fixed vessels And pipeline repair can refer to use.

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 150 (all parts) pressure vessels

GB/T 1954 Measurement method of ferrite content in chromium-nickel austenitic stainless steel welds

GB/T 20801 (all parts) Code for pressure piping for industrial piping

GB/T 21432 Graphite Pressure Vessels

GB/T 26467 Technical Specifications for Pressure Sealing of Pressure Equipment

GB/T 26468 Code for Design of Pressure Sealing Fixtures for Pressure Equipment

GB/T 42595 Basic Requirements for Repair of Pressure Equipment

NB/T 47013 (all parts) Non-destructive testing of pressure equipment

NB/T 47014 Welding procedure qualification for pressure equipment

NB/T 47015 Welding Rules for Pressure Vessels

NB/T 47018 (all parts) Order technical conditions for welding consumables for pressure equipment

3 Terms and Definitions

The following terms and definitions apply to this document.

3.1 Qualitative risk analysis

Under a series of assumptions, the model is established according to the ideal situation, and the hazard category, occurrence conditions, consequences, etc. of the accident are roughly estimated. analyze.

3.2 Expected repair life

The expected effect of the repair method is evaluated by using the manufacturing standard or suitability for use evaluation standard, and the equipment after the implementation of the repair plan is obtained remaining lifespan.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 96 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 150 · NB/T 47013

Cited by

GB/T 42605-2023Guidelines for repair of transportable pressure equipment

Similar standards

GB/T 17878-2026|GB/T 33578.3-2026|GB/T 33578.4-2026|GB/T 34527-2026|GB/T 47120-2026|GB/T 47578-2026

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