ISO 19723-1:2025
ISO 19723-1:2025 Road vehicles - Liquefied natural gas (LNG) fuel systems - Part 1: Safety requirements
standard byInternational Organization for Standardization , 01/01/2025
standard byInternational Organization for Standardization , 01/01/2025
This document specifies the minimum safety requirements applicable to liquefied natural gas (LNG) on-board fuel system intended for use on the types of motor vehicles defined in ISO3833.
u000bThis document is applicable to vehicles (mono-fuel, bi-fuel or dual-fuel applications) using LNG according to the ISO15403 series. It is applicable to original-production and converted vehicles.
u000bAll matters relating to the skills of installers and converters have been excluded from this document.
u000bThis document is only applicable to the components in the LNG system which is an assembly of components (tanks, valves, flexible fuel lines, etc., see AnnexB) and connecting parts (fuel lines, fittings, etc.) fitted on motor vehicles using LNG in their propulsion system and related components up to and including the vaporizer. Other parts downstream from the vaporizer are considered as compressed natural gas (CNG) components covered by the ISO15501 series.