CSA Group CSA/ANSI B107:24 National Standard of Canada American National Standard Enclosed hydrogen equipment — Safety

Preface

This is the first edition of CSA/ANSI B107, Enclosed hydrogen equipment — Safety.

This Standard is based on proven engineering principles, research, and the combined expertise of gas utilities, manufacturers, users, and others having specialized experience.

CSA Group acknowledges that the development of this Standard was made possible, in part, by the financial support of Natural Resources Canada.

This Standard is considered suitable for use for conformity assessment within the stated scope of the Standard.

This Standard was prepared by the Subcommittee on Enclosed Hydrogen Equipment, under the jurisdiction of the Technical Committee on Fuel Cells and the Strategic Steering Committee on Transportation, and has been formally approved by the Technical Committee.

This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group.

This Standard has been approved by the American National Standards Institute (ANSI) as an American National Standard.

Interpretations: The Strategic Steering Committee on Transportation has provided the following direction for the interpretation of standards under its jurisdiction: “The literal text shall be used in judging compliance of products with the safety requirements of this Standard. When the literal text cannot be applied to the product, such as for new materials or construction, and when a relevant CSA committee interpretation has not already been published, CSA Group’s procedures for interpretation shall be followed to determine the intended safety principle.

Notes:

1)  Use of the singular does not exclude the plural (and vice versa) when the sense allows.

2)  Although the intended primary application of this Standard is stated in its Scope, it is important to note that it remains the responsibility of the users of the Standard to judge its suitability for their particular purpose.

3)  This Standard was developed by consensus, which is defined by CSA Policy governing standardization — Code of good practice for standardization as “substantial agreement. Consensus implies much more than a simple majority, but not necessarily unanimity”. It is consistent with this definition that a member may be included in the Technical Committee list and yet not be in full agreement with all clauses of this Standard.

4)  A request for interpretation can be submitted to clarify the meaning of a provision in this Standard. To submit a request for interpretation, please refer to www.csagroup.org/request-for-interpretation. Committee interpretations are processed in accordance with the CSA Directives and guidelines governing standardization and are available on the Standards Activities page at standardsactivities.csagroup.org.

5)  Une demande d’interprétation pourrait être soumise afin de clarifier le sens d’une prescription dans la présente norme. Pour soumettre une demande d’interprétation, se référer à www.csagroup.org/demande-dinterpretation. Les interprétations du comité sont élaborées selon la publication Directives et lignes directrices de CSA concernant la normalisation et elles sont disponibles à la page Activités de normalisation, laquelle est affichée au standardsactivities.csagroup.org/fr.

6)  This Standard is subject to review within five years from the date of publication. Suggestions for its improvement will be referred to the appropriate committee. To submit a proposal for change, please send the following information to [email protected] and include Proposal for change” in the subject line:

a) Standard designation (number);

b) relevant clause, table, and/or figure number;

c) wording of the proposed change; and

d) rationale for the change.

Scope

1.1 Inclusions

This Standard applies to assemblies of hydrogen equipment integrated into an enclosure (i.e., enclosed hydrogen equipment, or EHE), such as a freight container or custom enclosure. See Annex B for examples of EHE.

This Standard applies to enclosures with a minimum floor area of 7.4 m2 (80 ft2) and a maximum floor area of 41.8 m2 (450 ft2).

EHE contains internal compartments (see Figures 1 and 2).

This Standard applies to EHE intended for stationary outdoor operation.

This Standard primarily addresses the safety requirements related to hydrogen and its use inside an enclosure.

Notes:

1)  This Standard applies to both the equipment and the enclosure (i.e., the combination of the hydrogen equipment and the enclosure in which it is integrated).

2)  The equipment enclosure can be a custom-built enclosure or a modified freight container, such as an ISO 1496-1 container.

3)  ISO containers conforming to ISO 1496-1 have floor areas within the range noted in this clause.

4)  This Standard applies to both fixed and transportable EHE.

1.2 Exclusions

1.2.1 Products covered by another product safety standard

This Standard does not apply to hydrogen equipment that has its own enclosure and is covered by one of the following product safety standards:

a) stationary fuel cell power systems, which are covered by CSA/ANSI FC 1 • CSA C22.2 No. 62282-3-100;

b) portable fuel cell power systems, which are covered by ANSI/CSA AMERICA FC 3;

c) fuel cell modules with enclosures, which are covered by CSA/ANSI FC 6 or CSA C22.2 No. 62282-2;

d) electrolyzers, which are covered by CSA/ANSI B22734;

e) dispensers, which are covered by CSA/ANSI HGV 4.1 or CSA HPIT 2; and

f) compact hydrogen fuelling stations, which are covered by CSA/ANSI HGV 5.2 or CSA IR 3-18.

Note: The standards referenced in this clause include requirements for the equipment enclosure.

1.2.2 Other equipment

This Standard does not apply to

a) gas cabinets that are installed in accordance with and comply with the requirements of NFPA 2, Section 6.19 or CAN/BNQ 1784-000;

b) exhausted enclosures that are installed in accordance with and comply with the requirements of NFPA 2, Section 6.20;

c) unenclosed hydrogen equipment installed in a room or building; or

d) hydrogen equipment placed in shipping containers or custom enclosures solely for the purpose of transportation or storage of the equipment.

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 Dual measurements

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 document are to be considered gauge pressures unless otherwise specified.