1 Scope
1.1
This Standard applies to liquefied natural gas metallic hose assemblies that are used on LNG dispensers to connect the dispenser to the refuelling nozzle and for gas lines that carry vented gas back to a safe location within the following service temperature range from –196 °C to +65 °C (–320 °F to +149 °F) and nominal hose size range DN (NPS) from 10 to 50 (3/8 to 2).
1.2
Hose assemblies covered by this Standard are intended for use with liquefied natural gas, a fluid in the liquid state at cryogenic temperatures that is composed predominantly of methane and that can contain minor quantities of ethane, propane, nitrogen, or other components normally found in natural gas.
1.3
Length, installation, and inspection of hoses for LNG dispensing is subject to requirements in accordance with NFPA 52, CSA B108, Part 2, or other standards, as applicable, and the authority having jurisdiction (AHJ).
1.4
In this Standard, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the Standard; “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 Standard.
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
The values given in SI units are the units of record for the purposes of this Standard. The values given in parentheses are for information and comparison only.
1.6
All references to pressure throughout this document are to be considered gauge pressures unless otherwise specified.
CSA/ANSI LNG 4.2-2020 history
2020CSA/ANSI LNG 4.2-2020 Hoses for liquefied natural gas (LNG) dispensing systems for natural gas vehicles (NGV)