Draft Details

1.1 General

This Standard contains requirements for the material, design, manufacture, marking, and testing of serially produced, refillable Type HGV2 containers intended only for the storage of compressed hydrogen gas for on-road vehicle operation. These containers

a) are to be permanently attached to the vehicle;

b) have a capacity of up to 1000 L (35.4 ft3) water capacity; and

c) have a nominal working pressure that does not exceed 70 MPa.

1.2 Container type

1.2.1 Cylindrical containers

Type HGV 2 containers are designated as follows:

a) Type 1: seamless metal container;

b) Type 2: hoop wrapped container with resin-impregnated continuous filaments and a metal liner;

c) Type 3: fully wrapped container with resin-impregnated continuous filaments and a metal liner; and

d) Type 4: fully wrapped container with resin-impregnated continuous filaments and a nonmetallic liner.

1.2.2 Conformable containers

Conformable container types are designated as follows:

a) CT1: container or assembly of a non-axisymmetric shape without a protective shell (i.e., outside wall containing gas pressure);

b) CT2: container or assembly of non-axisymmetric shape within a full or partial protective shell that is acting as a shield and not directly assisting the pressure containing elements with containing gas pressure; and

c) CT3: container or assembly of non-axisymmetric shape within a conformable protective shell that is acting as a shield and directly assisting the pressure containing elements with containing gas pressure.

The conformable container types shall have an additional identifier that is used in combination with the container type. A conformable container  shall be designated based on the design as a Type 1  to Type 4 with the additional conformable type identifier. For example, a Type 4 CT2 container would be required to meet the criteria for a Type 4 container as well as the criteria specified for a CT2 container.

1.3 Units of measurement

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 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.

1.5 Welded containers

This Standard does not cover welded metal containers or welded metal liners.

1.6 Precedence of requirements

Where a clause in this Standard is at variance with codes or standards referenced in this Standard, the requirements of this Standard shall govern.

1.7 Requalification of containers

In Canada, Type 1 steel containers may be requalified for further service in accordance with the procedure described in Annex E.