Preface
This is the fourth edition of CSA B108, Natural gas refuelling stations installation code. It supersedes the previous editions published in 2014, 1999, and 1995, under the title Compressed natural gas fueling stations installation code.
This Code consists of the following:
a) Part 1 — Compressed natural gas refuelling stations installation code; and
b) Part 2 — Liquefied natural gas refuelling stations installation code.
Part 1 is applicable to compressed natural gas (CNG) refueling stations. Part 2 is applicable to liquefied natural gas (LNG) refueling stations, including LNG to CNG conversion systems. Part 2 supersedes Annex D of CSA Z276, LNG vehicle fuelling stations.
Significant changes in this edition include the following:
a) Added a new Part 2 to address the design, location, construction, operation, operator training, and maintenance of LNG refueling stations, including mobile refuelling units, with single containment storage tanks up to 265 m3 (70 000 gal) water capacity employed for vehicle LNG dispensing operations.
b) Reorganized content for consistency of organization between Parts 1 and 2.
c) Revised scope, definitions, and requirements to include distinction between residential fuelling appliances (RFAs) and listed non-residential vehicle fuelling appliances (VFAs)
d) Revised Table 2 of Part 1, Electrical classification of space surrounding gas storage facilities, to indicate plugged ends of containers are not considered openings.
e) Clarified distinction between and requirements for fill post and dispensers at public and private refuelling locations.
f) Clarified requirements for hose length and prevention from contact with ground.
g) Clarified requirements for location of ESD button.
h) Added Figure 5 of Part 2 for hazardous area zones around CNG relief valve stack for clarification of requirements.
i) Clarified requirements for exits from a refuelling room.
j) Clarified refuelling area ventilation requirements.
k) Editorial revisions to clarify wording and references, resolve conflicts identified with other documents, provide consistency and clarification between Part 1 and Part 2, correct metrication values, and harmonize definitions with other industry codes and standards.
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.
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B108-18, Part 1 - Compressed natural gas refuelling stations installation code
Scope
1.1
Part 1 of this Code applies to all compressed natural gas refueling 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 fueling appliances (RFAs) and listed non- residential vehicle fueling 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.
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B108-18, Part 2 - Liquefied natural gas refuelling stations installation code
Scope
1.1
Part 2 of this Code applies to the design, location, construction, operation, operator training, and maintenance of LNG refueling 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 refueling
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 refueling 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 59advised 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.
