CAN/CSA B108-18

B108-18, Part 1 Compressed natural gas refuelling stations installation code 1 Scope 1.1 Part 1 of this Code applies to all compressed natural gas refuelling stations, including those that are intended for fleet or public dispensing operations. 1.2 Part 1 of this Code does not apply to refuelling vehicles with liquefied natural gas (LNG). Refuelling vehicles with LNG is addressed in Part 2 of this Code. However, if an LNG facility has capacity for CNG vehicle refuelling, Part 1 of this Code applies to facilities downstream of the isolation valve at the outlet of the natural gas odourizer. 1.3 Part 1 of this Code does not apply to listed residential fuelling appliances (RFAs) and listed non- residential vehicle fuelling appliances (VFAs) except where a) the aggregate inlet flow capacity of a connected VFA or RFA, or a combination thereof, exceeds 0.850 Sm3/min (30 SCFM), or b) the VFA or RFA is connected to storage, in which case coverage applies to the storage and dispensing system starting at the outlet of the individual VFA or RFA (see Figure B.1). 1.4 All references to pressure throughout Part 1 of this Code are to be considered gauge pressures, unless otherwise specified. 1.5 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; “may” is used to express an option or that which is permissible within the limits of the code; and “can” is used to express possibility or capability. 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. 1.6 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. B108-18, Part 2 Liquefied natural gas refuelling stations installation code 1 Scope 1.1 Part 2 of this Code applies to the design, location, construction, operation, operator training, and maintenance of LNG refuelling stations, including mobile refuelling units, with single containment storage tanks up to 265 cm3 (70 000 gal) water capacity employed for vehicle LNG dispensing operations. 1.2 Part 2 of this Code also applies to shop-fabricated and assembled refuelling stations when used to receive and store LNG to dispense LNG into vehicle fuel tanks. 1.3 If a refuelling station dispenses fuels in addition to LNG, Part 2 of this Code shall apply to only the LNG refuelling system and equipment. 1.4 Part 2 of this Code does not apply to the following: a) indoor refuelling b) marine vessel LNG fuelling facilities; c) rail locomotive LNG fuelling facilities; d) equipment or piping downstream of the L/CNG odourizer discharge isolation valve (see Part 1); e) CNG equipment including storage, compression, and/or dispensing equipment; f) equipment or piping downstream of the gas pressure regulator for closed boil-off gas systems; g) dispensing of LNG other than into vehicle or cargo fuel tanks; h) liquefaction equipment; i) LNG engine fuel systems; j) LNG and CNG repair garages; k) underground piping for LNG; and l) LNG storage tanks, pumps and process piping when an LNG refuelling station is sharing the LNG plant storage tank. 1.5 All references to pressure throughout Part 2 of this Code are to be considered gauge pressures, unless otherwise specified. 1.6 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; “may” is used to express an option or that which is permissible within the limits of the code; and “can” is used to express possibility or capability. 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. 1.7 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.