ISO 4987:2020
Steel and iron castings — Liquid penetrant testing
This document specifies a method for the liquid penetrant testing of steel castings.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Ordering information
5 Testing
5.1 Operating mode
5.2 Qualification of the operators
5.3 Surface preparation
5.4 Conditions of testing
6 Acceptance criteria
6.1 Definition of liquid penetrant indications
6.1.1 General
6.1.2 Non-linear indications (SP)
6.1.3 Linear indication (LP)
6.2 Severity levels
6.2.1 General
6.2.2 Non-linear indications
6.2.3 Linear indications
6.2.4 Selection of the severity level
6.2.5 Designation of severity levels
7 Classification of the indications and interpretation of results
7.1 Classification of the indications using Tables 1 and 2
7.1.1 General
7.1.2 Non-linear indications
7.1.3 Linear indications
7.2 Interpretation of results
8 Retesting
9 Post-examination cleaning procedures
10 Test report
Annex A (informative) Recommended surface finish for liquid penetrant testing
Annex B (informative) Reference figures — Non-linear isolated indications (SP)
Annex C (informative) Reference figures — Linear indications (LP)
Annex D (informative) Model of a liquid penetrant test report
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Ordering information
5 Testing
5.1 Operating mode
5.2 Qualification of the operators
5.3 Surface preparation
5.4 Conditions of testing
6 Acceptance criteria
6.1 Definition of liquid penetrant indications
6.1.1 General
6.1.2 Non-linear indications (SP)
6.1.3 Linear indication (LP)
6.2 Severity levels
6.2.1 General
6.2.2 Non-linear indications
6.2.3 Linear indications
6.2.4 Selection of the severity level
6.2.5 Designation of severity levels
7 Classification of the indications and interpretation of results
7.1 Classification of the indications using Tables 1 and 2
7.1.1 General
7.1.2 Non-linear indications
7.1.3 Linear indications
7.2 Interpretation of results
8 Retesting
9 Post-examination cleaning procedures
10 Test report
Annex A (informative) Recommended surface finish for liquid penetrant testing
Annex B (informative) Reference figures — Non-linear isolated indications (SP)
Annex C (informative) Reference figures — Linear indications (LP)
Annex D (informative) Model of a liquid penetrant test report
Bibliography