Preface
This is the first edition of CSA Standard B109, Natural Gas for Vehicles Installation Code. It provides requirements that supersede those of CAN/CSA-B149.4, published by the Canadian Gas Association.
In 1958 the Canadian Standards Association published the first edition of CSA Standard B149, Installation Code for Gas Burning Appliances and Equipment. It was superseded by editions published in 1962, 1966, and 1971. In 1974 the Canadian Gas Association was accredited by the Standards Council of Canada as the standards development organization responsible for preparing standards for gas-burning appliances and equipment, and in this connection took over responsibility for the B149 Code.
In 1982 Amendment No. 1 to CAN1-B149.1-M80 was published, containing provisions for the installation of natural gas vehicle (NGV) fuel system components on highway vehicles. These provisions were incorporated as parts of CAN/CGA-B149.1-M86. Subsequently, the parts dealing with the installation of NGV fuel system components and containers on highway vehicles were removed from CAN/CGA-B149.1-M91 and published as CAN/CGA-B149.4-M91. The primary reasons for establishing this Code were as follows:
(a) The provincial enforcing authorities for the other B149 Codes were not necessarily the enforcing body for NGV vehicle conversions. It was therefore felt reasonable to locate these provisions in a separate Code for those other enforcing authorities to adopt.
(b) In most cases, persons involved with converting NGV vehicles do not need those parts of B149.1 not covering NGV. A Code dedicated to NGV was convenient for such persons.
In 1997 the Canadian Standards Association acquired the standards development and certification business of the Canadian Gas Association; the B149 program had returned to its origins. At the same time technological innovation required that any extant NGV aspects be revised to remain relevant. In that context, the revision of the CAN/CGA-B149.4 Code was to be undertaken, circulated for public review and comment, and endorsed following due process under the requirements of the Standards Council of Canada. A new designation, B109, was assigned for the revised Code in keeping with current NGV nomenclature and that of the federal government.
As a note of clarification, within the NGV sector Codes are requirements that are implemented by regulations and enforced by a regulatory authority, whereas Standards are requirements against which products are assessed for their compliance with safety and performance criteria. Codes are not mandatory until adopted by authorities having jurisdiction, and are not retroactive. When promulgated, an effective date is designated for their implementation.
This document was prepared by the CSA B109 Subcommittee on the Natural Gas for Vehicles Installation Code and was formally approved by the Interim CSA Steering Committee on Natural Gas Powered Vehicles and Fuelling and the Interprovincial Gas Advisory Council.
Scope
1.1
This Code applies to the installation, servicing, and repair of natural gas fuel systems on self-propelled vehicles for the provision of motive power.
1.2
This Code does not apply to
(a) stationary engines;
(b) mobile equipment using natural gas as a fuel for other than propulsion;
(c) LNG vaporizers and LNG fuel storage systems;
(d) electronic components of a fuel management system; and
(e) storage or utilization of natural gas on boats or trains.
1.3
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.
Legends to equations and figures are considered requirements.
