Non-destructive testing—Test methods for helium leak testing English
1 Scope
This standard specifies the methods and requirements for helium leak testing. These test methods or techniques may be used to determine the leak location or measure the leak rate. See Annexes A to C for specific test technology.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections) to, or revisions, of any of these publications do not apply to this standard. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition applies.
GB/T 5616 Non-destructive testing—Guidelines for application
GB/T 9445 Non-destructive testing—Qualification and certification of NDT personnel (GB/T 9445-2008, ISO 9712: 2005, IDT)
GB/T 12604.7 Terminology for nondestructive testing—Leak testing
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 purposes of this standard, the terms and definitions given in GB/T 12604.7 and GB/T 20737 apply.
4 General requirements
4.1 Preliminary leak test
Prior to employing a more sensitive leak testing method, it may be expedient to perform a preliminary test to detect and eliminate gross leaks. It shall be noted that the possible leakage on test components shall not be sealed or masked during the specified test.
4.2 Specific requirements
The following items shall be considered when adopting the method or technology for leak testing of this standard:
a) Qualification and certificate of testing personnel (see GB/T 9445);
b) Technical standards;
c) Testing range;
d) Acceptable test sensitivity or leakage rate;
e) Report requirements;
f) Retention of records.
4.3 Equipment
4.3.1 Gages
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 General requirements
5 Test
6 Documentation
7 Report
Annex A (Normative) Detector probe technique
Annex B (Normative) Tracer probe technique
Annex C (Normative) Hood technique
