Storage and transportation systems for gaseous hydrogen—Part 3: Test method for determination of the susceptibility of metallic materials to hydrogen gas embrittlement (HGE)
Storage and transportation systems for gaseous hydrogen - Part 3: Test method for determination of the susceptibility of metallic materials to hydrogen gas embrittlement (HGE)
1 Scope
This standard specifies the general requirements, test equipment, sample requirements, test procedures, evaluation and test report of the susceptibility to hydrogen gas embrittlement (HGE) for the test for determination of the susceptibility of metallic materials to HGE
This standard is applicable to the evaluation of the susceptibility of metallic materials to hydrogen gas embrittlement.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 3634.2 Hydrogen - Part 2: Pure hydrogen, high pure hydrogen and ultrapure hydrogen
GB/T 4844 Pure helium and high pure helium and ultra pure helium
GB/T 10623 Metallic material - Mechanical testing - Vocabulary
GB/T 29729 Essential requirements for the safety of hydrogen systems
GB/T 34542.1 Storage and transportation systems for gaseous hydrogen - Part 1: General requirements
3 Terms and symbols
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 10623 and the following apply.
3.1.1 disk sample
circular sheet specimen for the test for determination of the susceptibility to hydrogen gas embrittlement
.... ...
3.1.2 flatness
maximum variation of each point on the surface of a disk sample relative to its ideal plane
3.1.3 burst pressure
maximum pressure (gauge pressure) that the disk sample bears during hydrogen or helium pressurization
3.1.4 loading time
total time elapsed from the beginning of hydrogen or helium pressurization until the disk sample burst
3.2 Symbols
For the purposes of this document, the following symbols apply.
em Average thickness of the disk sample (average thickness of four points separated by 90 degrees on disk sample), mm;
pr Burst pressure, MPa;
Foreword i
1 Scope
2 Normative references
3 Terms and symbols
4 General requirements
5 Test apparatus
6 Requirements for specimen
7 Test procedure
8 Evaluation of susceptibility to hydrogen gas embrittlement (HGE)
9 Test report
Annex C (Informative) Basic structure of main body of test equipment
Annex D (Normative) Determination method of the susceptibility coefficient to hydrogen gas embrittlement
