BS 7910-2019 (2025) 金属结构裂纹验收评定方法指南

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BS 7910:2019

Incorporating Corrigendum No. 1

Guide to methods for assessing

the acceptability of ﬂaws in

metallic structures

BSI Standards Publication

Publishing and copyright information

The BSI copyright notice displayed in this document indicates when the document

was last issued.

ßThe British Standards Institution 2025

Published by BSI Standards Limited 2025

ISBN 978 0 539 33282 7

ICS 25.160.40

The following BSI references relate to the work on this standard:

Committee reference WEE/37

Draft for comment 19/30369477 DC

Amendments/corrigenda issued since publication

Date Text affected

January 2025 C1. See Foreword for details

BS 7910:2019 BRITISH STANDARD

Contents

Foreword ix

0 Introduction 0/1

1 Scope 1/1

2 Normative references 1/1

3 Symbols and deﬁnitions 1/1

4 Types of ﬂaw 4/1

5 General guidance on assessment 5/1

5.1 Modes of failure and material damage mechanisms 5/1

5.2 Sequence of assessment 5/2

5.3 Fracture assessment options 5/3

6 Information required for assessment 6/1

6.0 Symbols and deﬁnitions 6/1

6.1 General 6/1

6.2 Essential data 6/2

6.3 Non-destructive testing 6/2

6.4 Stresses to be considered 6/4

7 Assessment for fracture resistance 7/1

7.0 Symbols and deﬁnitions 7/1

7.1 Background 7/4

7.2 Procedure 7/32

7.3 Assessment (Options 1 to 3) 7/34

7.4 Further points 7/39

8 Assessment for fatigue 8/1

8.0 Symbols and deﬁnitions 8/1

8.1 Assessment procedures 8/3

8.2 Data required for assessment 8/7

8.3 Probability of survival 8/14

8.4 General procedure for fracture mechanics assessment of planar

ﬂaws 8/15

8.5 Basis of procedure for assessing ﬂaws using quality categories 8/16

8.6 Assessment of planar ﬂaws using quality categories 8/19

8.7 Assessment of embedded non-planar ﬂaws using quality categories 8/37

8.8 Assessment of shape imperfections using quality categories 8/39

8.9 Estimation of tolerable sizes of ﬂaws 8/41

9 Assessment of ﬂaws under creep and creep/fatigue conditions 9/1

9.0 Symbols and deﬁnitions 9/1

9.1 General 9/3

9.2 Background to methods 9/4

9.3 Background to assessments 9/4

9.4 Factors involved in the safe use of the procedure 9/5

9.5 Creep exemption criteria 9/5

9.6 Creep-fatigue exemption criteria 9/8

9.7 Crack behaviour at high temperature 9/9

9.8 Assessment of components containing a known or postulated

defect 9/11

9.9 Further guidance on the assessment procedure 9/15

9.10 Basic calculations 9/17

9.11 Material data for predicting crack initiation and growth under creep and

creep/fatigue 9/19

9.12 Guidance on performing assessment calculations 9/20

9.13 Assess signiﬁcance of results 9/22

10 Assessment for other modes of failure 10/1

10.0 Symbols and deﬁnitions 10/1

10.1 Yielding due to overloading of remaining cross-section 10/1

10.2 Leakage in pressure, liquid or vacuum containing equipment 10/2

BRITISH STANDARD BS 7910:2019

ßThe British Standards Institution 2025 .i

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标签： #金属 #结构

摘要：

BS 7910-2019 (2025) 是英国标准学会发布的最新版金属结构裂纹验收评定方法指南，该标准整合了2019年版本的核心技术内容与2025年的修订更新，广泛应用于压力容器、管道、海洋工程及桥梁等关键金属结构的完整性评估。作为全球工程领域公认的缺陷评定标准之一，BS 7910 提供了基于断裂力学和疲劳失效分析的系统化方法，帮助工程师判定结构中已存在的裂纹、类裂纹缺陷或焊接不连续是否可接受，以避免不必要的停机、维修或更换。该标准覆盖了韧性断裂、脆性断裂、疲劳裂纹扩展、应力腐蚀开裂等多种失效模

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