1 Scope
This standard specifies acceptance levels for indications from surface breaking imperfections in metallic welds detected by penetrant testing.
This standard is primarily intended for use during manufacture inspection, but where appropriate, it can be used for in-service inspection.
The acceptance levels in this standard are based on detection capabilities that can be expected when using techniques specified in GB/T 18851.1 and parameters recommended in Appendix A. The acceptance levels can be related to welding standards, application standards, specifications or codes. More information relevant to acceptable levels of indications can be found in product or application standards.
2 Normative References
The following documents are indispensable for the application of this standard. For dated references, only the dated edition is applicable to this document. For undated references, the latest editions of the normative documents (including all the amendments) are applicable to this document.
GB/T 12604.3 Non-destructive Testing - Terminology - Terms used in Penetrant Testing (GB/T 12604.3-2005, ISO 12706: 2000, IDT)
GB/T 18851.1 Non-destructive Testing - Penetrant Testing - Part 1: General Principles (GB/T 18851.1-2005, ISO 3452: 1984, IDT)
GB/T 18851.2 Non-destructive Testing - Penetrant Testing - Part 2: Testing of Penetrant Materials (GB/T 18851.2-2008, ISO 3452-2: 2006, IDT)
GB/T 20737 Non-destructive Testing - General Terms and Definitions (GB/T 20737-2006, ISO/TS 18173: 2005, IDT)
3 Terms and Definitions
For the purpose of this standard, the terms and definitions specified in GB/T 12604.3 and GB/T 20737 as well as the following ones apply.
3.1 Linear indication
Indication with the length larger than 3 times the width.
3.2 Non-linear indication
Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 Testing Parameters
5 Acceptance Levels
Appendix A (Informative) Recommended Testing Parameters
