ISO/TC 340 - ISO/TC 340

This document specifies requirements for the design, construction, operation, maintenance and inspection of stations for fuelling liquefied natural gas (LNG) to vehicles, including equipment, safety and control devices. This document also specifies the design, construction, operation, maintenance and inspection of fuelling stations using LNG as an onsite source for supplying compressed natural gas (CNG) to vehicles, commonly referred to as liquefied-to-compressed natural gas (LCNG) fuelling stations, including safety and control devices of the station and specific LCNG fuelling station equipment. NOTE Specific CNG equipment is dealt with in ISO 16923. This document is applicable to fuelling stations receiving LNG and other liquefied methane-rich gases such as bio LNG which comply with local applicable gas composition regulations or with the gas quality requirements of ISO 13686. This document covers all equipment from the LNG storage tank unloading connection up to (but not including) the fuelling nozzle on the vehicle. The LNG storage tank unloading connection itself and the vehicle fuelling nozzle are not covered in this document. This document applies to fuelling stations having the following characteristics: — private access; — public access (self-service or assisted); — metered dispensing and non-metered dispensing; — fuelling stations with fixed LNG storage; — fuelling stations with mobile LNG storage; — movable fuelling stations; — mobile fuelling stations; — multi-fuel stations. This document does not apply to: — equipment, piping, or tubing downstream of the gas pressure regulator for closed boil-off gas systems; — liquefaction equipment.

This document specifies requirements for the design, construction, operation, maintenance and inspection of stations for fuelling compressed natural gas (CNG) to vehicles, including equipment, safety and control devices up to the fuelling nozzle to the vehicle. This document applies to fuelling stations supplied with natural gas as defined in local applicable gas composition regulations or ISO 13686. It also applies to other gases meeting these requirements. This document also applies to portions of a fuelling station where natural gas is in a gaseous state and dispensing CNG derived from liquefied natural gas (LCNG) according to ISO 16924. This document covers all equipment for downstream gas supply connection (i.e. point of separation between the CNG fuelling station piping and the pipeline network). Fuelling station nozzle are not defined in this document. This document covers fuelling stations with the following characteristics: — slow fill; — fast fill; — private access; — public access (self-service or assisted); — fuelling stations with fixed storage; — fuelling stations with mobile storage (daughter station); — multi-fuel stations. This document is not applicable to vehicle to vehicle transfer or vehicle refuelling appliances (VRA). NOTE This document is based on the condition that the gas entering the fuelling station is odorized. For unodorized gas fuelling stations, additional safety requirements are included in Clause 10.