ANSI/CSA CHMC 1-2014 (R2018)

Preface
0 Introduction
1 Scope
2 Reference publications
3 Definitions
4 General requirements
5 Test methods
6 Material qualification
Annex A (informative) - Additional information on hydrogen
        gas purity requirements
Annex B (informative) - Additional considerations regarding
        transducers exposed to gaseous hydrogen
Annex C (informative) - Recommendations if using external
       displacement measurement
Annex D (informative) - Test temperature
Annex E (informative) - Recommendations on testing
        hydrogen-precharged specimens
Annex F (normative) - Statistical analysis of fatigue data
Annex G (informative) - Recommended procedures for qualification
        of welds
Annex H (informative) - Bibliography

Preface This is the first edition of ANSI/CSA CHMC 1-2014, Test methods for evaluating material compatibility in compressed hydrogen applications - Metals. It supersedes the previous CSA CHMC 1-2012 edition published in 2012. Scope This standard provides uniform test methods for evaluating material compatibility with compressed hydrogen applications. The results of these tests are intended to provide a basic comparison of materials performance in applications utilizing compressed hydrogen. This standard is not intended to replace sound engineering judgment; additional testing considerations may be necessary to fully qualify the design of a component manufactured for use in certain hydrogen applications. This standard applies to metallic materials only. If the value for measurement as given in this standard is followed by an equivalent value in other units, the first stated value is to be regarded as the specification. All references to pressure throughout this standard are to be considered gauge pressures, unless otherwise specified.

Preface This is the first edition of ANSI/CSA CHMC 1-2014, Test methods for evaluating material compatibility in compressed hydrogen applications - Metals. It supersedes the previous CSA CHMC 1-2012 edition published in 2012. Scope This standard provides uniform test methods for evaluating material compatibility with compressed hydrogen applications. The results of these tests are intended to provide a basic comparison of materials performance in applications utilizing compressed hydrogen. This standard is not intended to replace sound engineering judgment; additional testing considerations may be necessary to fully qualify the design of a component manufactured for use in certain hydrogen applications. This standard applies to metallic materials only. If the value for measurement as given in this standard is followed by an equivalent value in other units, the first stated value is to be regarded as the specification. All references to pressure throughout this standard are to be considered gauge pressures, unless otherwise specified.