Draft Details

1.1 Inclusions

This standard provides uniform test methods for evaluating material performance in compressed hydrogen applications. The results of these tests are intended to provide basic 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.

1.2 Conflict with government requirements

In the case of conflict between this Standard and federal, provincial/territorial, state, or local requirements, the governmental requirements take precedence.

1.3 Units of measure

The values given in SI units are the units of record for the purposes of this Standard.  The values given in parentheses are for information and comparison only.

1.4 Gauge pressure

All references to pressure throughout this Standard are to be considered gauge pressures, unless otherwise specified.

1.5 Terminology

In this Standard, “shall” is used to express a requirement, i.e., a provision that the user shall satisfy in order to comply with the Standard; “should” is used to express a recommendation or that which is advised but not required; and “may” is used to express an option or that which is permissible within the limits of the Standard.

Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.

Notes to tables and figures are considered part of the table or figure and may be written as requirements.

Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.