Natural gas fuelling stations - Compressed natural gas (CNG) stations for fuelling vehicles (ISO 16923:2026)

2Scope / Description

This document covers the design, construction, operation, maintenance, and inspection of compressed natural gas (CNG) refueling stations, including their equipment and associated safety and control systems, down to the vehicle refueling nozzle. It applies to stations supplied with natural gas whose composition complies with local gas composition requirements or ISO 13686, and extends to other gases meeting the same requirements. The scope also includes those station components where gaseous natural gas derived from liquefied natural gas (LNG) in accordance with ISO 16924 is dispensed as CNG. All equipment located downstream of the gas supply point connector (i.e., the demarcation point between the CNG station piping and the gas grid piping) is included. The refueling nozzle itself is not defined within this document. The document addresses stations with the following characteristics: slow filling; fast filling; access restricted to authorized users; public access (served or self-service); fixed-volume stations; mobile-volume stations (branch of a base station); and multi-fuel stations. This document does not cover vehicle-to-vehicle transfer or CNG refueling units installed in households equipped with storage tanks. NOTE: This document assumes that gas entering the station is odorized. For stations using non-odorized gas, additional safety requirements are specified in Clause 11. NOTE: In the original English version, the reference is made to Clause 10, whereas the requirements for odorization appear in Clause 11.