Residential hydrogen fuelling appliances

Note: The title and scope for this NOI (originally published on Aprlil 21, 2022) was updated by the responsible SDO on March 19, 2024.
Note: As requested by the responsible SDO, this NOI being reissued as the standard was in the initial stages of development for more than 12 months. An additional comment period of March 19 to April 11, 2024 will be applied.

 

1.1 General

This Standard details mechanical, physical, and electrical requirements for a newly manufactured appliance that compresses hydrogen gas and dispenses directly into the vehicle hydrogen gas fuel storage system, referred to as a residential hydrogen fuelling appliance (RHFA).

This Standard applies to RHFAs that may incorporate generation, compression, storage, or dispensing in the same appliance.

Notes:

1) Compact hydrogen fuelling systems (cHFS) are addressed in CSA HGV 5.2.

2) Devices dedicated only to dispensing fuel into vehicles are addressed in CSA HGV 4.1.

1.2 Application

This standard applies to all RHFAs that:

a) are intended for fuelling of hydrogen-powered vehicles only;

b) are intended for outdoor installations;

c) may have a hydrogen generator internal or external to the enclosure, hydrogen pipeline source or other source of hydrogen supply;

d) produces (or consumes, if pipeline is used) hydrogen at a rate equal to or less than the limit referenced in NFPA 2 or CAN/BNQ 1784-000;

e) may have a compressor with a single or multiple compression stages;

f) are intended to meet the installation requirements in accordance with NFPA 2 or CAN/BNQ 1784-000;

g) are intended for H25, H35, H50, H70 or multiple combinations fuelling;

h) are intended for fuel quality that meets or exceeds requirements in SAE J2719 and / or ISO 14687-22; and

i) consists of single or dual hose fuelling systems.

 

1.3 Out of scope

A RHFA that also supplies oxygen as a product is excluded from the Scope of this Standard.

 

1.4 Pressure references

All references to "kPa" and “psig” throughout this Standard are to be considered gauge pressures, unless otherwise specified.

 

1.5 Resolution of conflicts

In the case of conflict between this Standard and federal, national, provincial, state, or local requirements, the requirements of the authority having jurisdiction take precedence.

 

1.6 Units of measure

This Standard contains SI (metric) units corresponding to the inch/pound quantities, the purpose being to allow the Standard to be used in SI (metric) units. If a value for a measurement and a corresponding value in other units are stated, the first stated value is to be regarded as the requirement. The given corresponding value may be approximate. If a value for a measurement and a corresponding value in other units are both specified as a quoted marking requirement, then the first stated unit or both are to be provided.

Note: IEEE/ASTM SI 10 or ISO 80000-1 is used as a guide in making metric conversion from inch/pound quantities.

 

Standard Conditions

Unless otherwise stated, standard conditions are as follows:

a) temperature, 15 °C; and

b) pressure, 101 kPa.

 

1.7 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.

1.8 Alternate construction

The requirements of this Standard are not intended to constrain innovation. When considering fuels, materials, designs, or constructions not specifically dealt with in this Standard, these alternatives shall be evaluated as to their ability to yield levels of safety and performance equivalent to those prescribed by this Standard.