CSA B108.2:23

1 Scope 1.1 Inclusions This Code applies to a) the design, location, construction, operation, operator training, and maintenance of LNG refuelling stations; b) LNG mobile refuelling units (MRUL) or LNG portable refuelling units (PRUL) with single containment storage tanks up to 265 m3 (70 000 gal) water capacity employed for vehicle LNG dispensing operations; c) shop-fabricated and assembled refuelling stations when used to receive and store LNG to dispense LNG into vehicle fuel tanks; and d) the LNG portion of stations that vapourize and pressurize LNG to obtain CNG, up to and including the odourizer’s outlet isolation valve. Note: When a refuelling station dispenses fuels in addition to LNG, this Code applies only to the LNG refuelling system and equipment. 1.2 Exclusions This Code does not apply to a) indoor refuelling; b) marine vessel LNG fuelling facilities; c) rail locomotive LNG fuelling facilities; d) equipment, piping, or tubing downstream of the L/CNG system odourizer’s outlet isolation valve (see CSA B108.1); e) CNG equipment including storage, compression, and/or dispensing equipment; f) CNG mobile refuelling units (MRUG) or CNG portable refuelling units (PRUG); g) equipment, piping, or tubing downstream of the gas pressure regulator for closed boil-off gas systems; h) dispensing of LNG other than into vehicle or cargo fuel tanks; i) liquefaction equipment; j) LNG engine fuel systems; k) LNG and CNG repair garages; l) underground piping or tubing for LNG; m) LNG storage tanks, pumps, and process piping or tubing when an LNG refuelling station is sharing the LNG plant storage tank; and n) transfer of LNG from the LNG vehicle fuel storage system of one vehicle to the LNG vehicle fuel storage system of another vehicle. Note: This does not apply to a bulk fuel storage system. 1.3 Pressure terminology Unless otherwise specified, all references to pressure throughout this Code are to be considered gauge pressures. 1.4 Terminology 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. 1.5 Units of measurement 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 U.S. customary units to SI units. 2) Where the abbreviation “gal” is used in this Code, it indicates a U.S. gallon equivalent to 3.785 L water capacity. 3) This Code was developed originally using the U.S. customary system of measurement and subsequently converted to SI units having three significant digits. Every attempt has been made to provide accurate conversion values; however, when designing systems using these values, engineering judgment should be applied.