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Guidelines for repair of stationary pressure vessels
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Basic data
| Standard ID | GB/T 42606-2023 (GB/T42606-2023) |
| Description (Translated English) | Guidelines for repair of stationary pressure vessels |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | J74 |
| Classification of International Standard | 23.020.30 |
| Word Count Estimation | 102,195 |
| Date of Issue | 2023-05-23 |
| Date of Implementation | 2023-05-23 |
| Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration |
GB/T 42606-2023: Guidelines for repair of stationary pressure vessels
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 23:020:30
CCSJ74
National Standards of People's Republic of China
Guidelines for Repair of Stationary Pressure Vessels
Released on 2023-05-23
2023-05-23 implementation
State Administration for Market Regulation
Released by the National Standardization Management Committee
table of contents
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 General requirements 2
5 Welding repairs 5
5:1 Welding gouging repair 5
5:2 Surfacing repair of outer wall 11
5:3 Seal welding repair 16
5:4 Repair of Welding Fixtures 17
5:5 Socket welding repair 21
5:6 Repair of welded plate with reinforced plug 26
5:7 Fillet welded plate repair 31
5:8 Surfacing and Repair Welding 35
5:9 Repair of threaded or plug-welded plugs 39
6 Mechanical Repair 41
6:1 Replacement of pressure-bearing parts 41
6:2 Freezing plugs 42
6:3 Thread repair 47
6:4 Metal removal 49
6:5 Flange repair and replacement 52
6:6 Mechanical Fixture Repair 54
6:7 Pipe straightening or bending 58
7 Inspection and testing 60
8 Document Management 60
Appendix A (Normative) Repair of Graphite Pressure Vessels 61
A:1 Repair 61
A:2 Non-destructive testing and testing 62
Appendix B (Informative) Alternatives to Preheating Before Welding 63
B:1 Overview 63
B:2 Design 63
B:3 Repair 65
B:4 Non-destructive testing 67
Appendix C (informative) Alternative methods for post-weld heat treatment 69
C:1 Overview 69
C:2 Repair 69
Appendix D (informative) In-service welding of carbon steel pressure equipment 70
D:1 Overview 70
D:2 Precautions and safety precautions 70
D:3 Types of in-service welding 70
D:4 In-service welding process variables 71
D:5 Non-destructive testing 76
Appendix E (informative) On-site heat treatment 77
E:1 Overview 77
E:2 Design 77
E:3 Repair Precautions 79
E:4 Inspection and testing 79
Appendix F (Informative) Welding Precautions for Chromium Molybdenum Steel Pressure Vessels 81
F:1 Overview 81
F:2 Design 83
F:3 Repair 84
F:4 Non-destructive testing 85
F:5 Test 85
Appendix G (Informative) Methods of Hot Disassembly and Half Disassembly of Bolts 86
G:1 Overview 86
G:2 Associated risks 86
G:3 Design 86
G:4 Disassembly process 87
Appendix H (Informative) Overhaul of Shell and Tube Heat Exchangers 89
H:1 Overview 89
H:2 Design 89
H:3 Repair 91
H:4 Non-destructive testing 94
H:5 Test 95
References 96
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:
Please note that some contents of this document may refer to patents: The issuing agency of this document assumes no responsibility for identifying patents:
This document is proposed and managed by the National Standardization Technical Committee of Boilers and Pressure Vessels (SAC/TC262):
This document was drafted by: China Special Equipment Inspection and Research Institute, Hefei General Machinery Research Institute Co:, Ltd:, Sinopec
Co:, Ltd:, First Heavy Group Dalian Nuclear Power Petrochemical Co:, Ltd:, PetroChina Karamay Petrochemical Co:, Ltd:, PetroChina Sichuan Petrochemical Co:, Ltd:
Responsible company, Beijing University of Aeronautics and Astronautics, Nanjing University of Technology, Jiangsu Special Equipment Safety Supervision and Inspection Research Institute, Sinopec Engineering Construction
Co:, Ltd:, Beijing Yanhua Engineering Construction Co:, Ltd:, Shanghai Secco Petrochemical Co:, Ltd:, Zhongte Inspection Group Co:, Ltd:
The main drafters of this document: Li Zhifeng, Shao Shanshan, Kang Xiaopeng, Bu Huaquan, He Chenghou, Ren Gang, Zhou Fengge, Zhao Minzhen, Zhang Engui,
Sun Fuguang, Zhang Zheng, Zhao Jianping, Miao Chunsheng, Xia Shaoqing, Kang Hongyan, Lu Baoxi, Song Libin, Guo Jingqian, Li Zhihui:
Guidelines for Repair of Stationary Pressure Vessels
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
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 expectedrepairlife
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:
...
