1 Scope
1.1 Inclusions
This Standard establishes requirements for newly produced compressed hydrogen gas fuel system components, as listed below, that are intended for use on hydrogen gas powered vehicles:
a)
check valves (see Clause 8);
b)
manual valves (see Clause 9);
c)
manual container valves (see Clause 10);
d)
automatic valves and automatic container valves (see Clause 11);
e)
hydrogen injectors (see Clause 12);
f)
pressure sensors, temperature sensors, and pressure gauges (see Clause 13);
g)
pressure regulators (see Clause 14);
h)
pressure relief valves (PRV) (see Clause 15);
i)
pressure relief devices (PRD) (see Clause 16);
j)
excess flow valves (see Clause 17);
k)
gastight housing and ventilation passages (see Clause 18);
l)
stainless steel rigid fuel lines (see Clause 19);
m)
flexible fuel lines, hoses, and assemblies (see Clause 20);
n)
filter assemblies (see Clause 21);
o)
fittings (see Clause 22);
p)
non-metallic, low-pressure rigid fuel lines (see Clause 23); and
q)
discharge line closures (see Clause 24).
Note: Other components not specifically covered here can be examined to meet the criteria of CSA/ANSI HGV 3.1 and tested according to the appropriate functional needs.
1.2 Applicability
This Standard applies to devices that have a nominal working pressure of either 25MPa, 35MPa, 50MPa, or 70MPa, referred to in this Standard as the following pressure classes:
a)
“H25” — 25 MPa;
b)
“H35” — 35 MPa;
c)
“H50” — 50 MPa; and
d)
“H70” — 70 MPa.
This Standard also applies to components downstream of the first stage of pressure reduction with a maximum operating pressure designated by the manufacturer in MPa or kPa (psi).
1.3 Exclusions
This Standard does not apply to the following:
a)
hydrogen gas fuel system components incorporated during the manufacture of motor vehicles originally manufactured in compliance with the Federal Motor Vehicle Safety Standards (FMVSS)
for Compressed Hydrogen Gas Fueled Vehicles and the Canadian Motor Vehicle Safety Standard (CMVSS);
b)
fuel containers;
c)
stationary power generation applications;
d)
container mounting hardware;
e)
electronic fuel management; or
f)
refuelling receptacles.
1.4 Conflicts
In the case of a conflict between this Standard and federal, provincial, state, or local requirements, government requirements will take precedence.
1.5 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 (nonmandatory) to define their application.
1.6 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.
All references to pressure throughout this Standard are to be considered gauge pressures, unless otherwise specified.
Note: IEEE/ASTM SI 10 or ISO 80000-1 can be used as a guide in making metric conversion from yard/pound quantities.