Draft Details

1.1 Inclusions

This Code applies to the design, location, construction, operation, operator training, and maintenance of

a) CNG vehicle refuelling stations; and

b) CNG bulk transport filling and decanting stations, including

i)     those that are fixed or mobile and intended for private or public dispensing operations; and

ii)    bulk transport filling and decanting stations that feed CNG pressure reduction stations or other non-vehicle uses.

1.2 Exclusions

This Code does not apply to

a)    refuelling vehicles with liquefied natural gas (LNG), which is covered by CSA B108.2. However, when an LNG facility has capacity for CNG vehicle refuelling from a liquid to compressed natural gas system (L/CNG system), this Code applies to facilities downstream of the L/CNG system odourizer’s outlet isolation valve;

b)    transfer of CNG from the CNG vehicle fuel storage system of one vehicle to the CNG vehicle fuel storage system of another vehicle;

c)    certified refuelling appliances (RFAs), except where

i)     the total flow capacity of a single refuelling appliance (RA), or multiple refuelling appliances is greater than 0.850 Sm3/min (30 SCFM); or

ii)    the RA is connected to piping tubing or storage. In this case, this Code applies to the piping, storage and dispensing system, starting at the outlet of the individual RA (see Figure D.1); and

d)    mobile equipment containing compressed natural gas in accordance with Transport Canada’s Transportation of Dangerous Goods Act and Regulations.

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 Use of SI units

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 originally developed 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.