CSA B109.2:21

Preface 

This is the first edition of CSA B109.2, Liquefied natural gas vehicle installation code . It supersedes the previous editions published in 2017 and 2014 as Part 2 of CSA B109, Natural gas for vehicles installation code. CSA B109.1 is applicable to compressed natural gas (CNG). CSA B109.2 is applicable to liquefied natural gas (LNG). Changes in this edition include the following: a) revisions to clarify wording and references, tables, and figures; b) resolved conflicts identified with other documents; c) provided consistency and clarification between this Code and CSA B109.1; d) corrected metrication values; and e) harmonized definitions with other industry codes and standards. CSA Group acknowledges that the development of this Code was made possible, in part, by the financial support of Natural Resources Canada. This Code 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. 

Scope 

1.1 Application This Code applies to the installation, inspection, repair, and maintenance of the fuel storage and delivery system installed in powered industrial truck applications and vehicles for use with liquefied natural gas (LNG). This includes fuel systems on self-propelled vehicles for the provision of motive power. Federal or provincial regulatory requirements might supersede the requirements of this Code. 

1.2 Exclusions This Code does not apply to a) stationary engines; b) mobile equipment using natural gas as a fuel for other than propulsion; c) electronic components of a fuel management system; d) storage or utilization of natural gas on marine vessels or rail vehicles or transportation by tanker truck; e) recreational all-terrain vehicles; and f) motorcycles. 

1.3 Units of measure The values given in SI units are the units of record for the purposes of this Code. The values given in parentheses are for information and comparison only. Notes: 1) IEEE/ASTM SI 10 or ISO 80000-1 can be used as a guide when converting imperial units to metric units. 2) Where the word "gallon" is used in this Code, it indicates a U.S. gallon equivalent to 3.785 L water capacity. 

1.4 Pressure references All references to "psi" throughout this Code are to be considered gauge pressures, unless otherwise specified. 

1.5 Mandatory and informative provisions In this Code, "shall" is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the Code; "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 Code. 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.