ISO Publishes Standards for CNG and LNG Fuelling Stations

| International | Source: NGV Global

LNG dispenserIn December 2016, ISO published two international standards that will play an important role in the deployment of the alternative fuels infrastructure. The publication of ISO 16923 and ISO 16924 respectively enables entities to apply broadly supported requirements for the design, construction, operation, maintenance and inspection of CNG and LNG fuelling stations. NGV Global has been a key player in the process for these two Standards.

ISO 16923 and ISO 16924 fall under the mandate of ISO/PC 252  – Natural gas fuelling stations for vehicles.

ISO 16923:2016

ISO 16923:2016 covers the design, construction, operation, inspection and maintenance of stations for fuelling compressed natural gas (CNG) to vehicles, including equipment, safety and control devices. It 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. The standard is inclusive of biomethane, upgraded coal-bed methane (CBM) and gas supplies coming from LNG vaporization (on-site or off-site). 16923:2016 is based on the condition that the gas entering the fuelling station is odorized.

ISO 16924:2016

ISO 16924:2016 specifies the design, construction, operation, maintenance and inspection of stations for fuelling liquefied natural gas (LNG) to vehicles, including equipment, safety and control devices. It also specifies the design, construction, operation, maintenance and inspection of fuelling stations for using LNG as an onsite source for fuelling CNG to vehicles (LCNG fuelling stations), including safety and control devices of the station and specific LCNG fuelling station equipment. The standard is inclusive of all equipment from the LNG storage tank filling connection up to the fuelling nozzle on the vehicle. The LNG storage tank filling connection itself and the vehicle fuelling nozzle are not covered in this document.

Development History

ISO Roundtable 2007

John Lyon, IANGV (NGV Global) president, chairs the inaugural session in 2007.

NGV Global has played a key role since inception of these standards. In 2007 UN and ISO co-organized a Roundtable on harmonization of standards for gaseous fueled vehicles, held in Geneva. The idea for this coordinated effort came from NGV Global, at that time known as IANGV. At the meeting several standardization gaps were detected (NGV Global prepared a Gap Analysis which was presented at the meeting). UN and ISO agreed to promote the adoption of standards generated as a result of this meeting.

Shortly thereafter, NGV Global submitted work proposals to ISO for standards for CNG and LNG fueling stations. The kickoff meeting was held in January 2008 in Zurich, and resulted in the creation of ISO PC252 and two working groups: WG1 for CNG fueling stations and WG2 for LNG and LCNG stations. NGV Global proposed the leaders for these groups (PC252 Chair: Martin Seifert, WG1: Diego Goldin, and WG2: Vaclav Chrz). NEN (Netherlands Standardization Institute) agreed to carry the burden of being Secretariat to this Project Committee. Co-Convenors were designated by the Committee to expand the support: Erik Bükther and Philippe Fauvel.

NGV Global has been involved throughout the process, and increased participation and influence after the appointment of Diego Goldin as NGV Global Executive Director. Members of the committee have recently asked the international association to propose new work items for the Committee.

“NGV Global is very happy to have been an important factor in achieving these two very important standards, required by the Global community,” says Goldin. “They will promote safety while avoiding conflicting requirements that would only increase costs and generate barriers to the global implementation of gas as a sustainable and economic fuel for transportation.”


In a related press release, NEN explains the European Commission published the Directive on the deployment of alternative fuels infrastructure (2014/94/EU) in 2014. This Directive refers to technical specifications for infrastructure that should be established in European standards with respect to interoperability aspects. For this reason, the European Commission has requested the European organisations for standardization – CEN and CENELEC – to develop these standards including CNG and LNG fuelling stations.

European stakeholders have indicated that ISO 16923 and ISO 16924 will be adequate to be adopted as European standard, and with that as national standard in the 34 countries that are member of CEN. This adoption process will be initiated in 2017.

“Europe and Argentina are already using these recently published standards in their standardization processes,” Goldin says.

For information or inquiries regarding these standards, please email

Print Friendly, PDF & Email