CSA/ANSI HGV 4.5:23

1 Scope 1.1 Inclusions This Standard applies to priority and sequencing equipment used in compressed gaseous hydrogen fuelling stations and specifies general, materials, construction, and assembly requirements. 1.2 Exclusions This Standard does not apply to equipment already covered by CSA/ANSI HGV 4.9. 1.3 Terminology In this Standard, “shall” is used to express a requirement, i.e., a provision that the user is obliged to 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. 1.4 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.