ISO 16923-2016 PDF

Full title and description

St ISO 16923-2016 — Natural gas fuelling stations — CNG stations for fuelling vehicles. This International Standard specifies requirements for the design, construction, operation, inspection and maintenance of compressed natural gas (CNG) fuelling stations and the associated equipment, safety and control devices.

Abstract

ISO 16923:2016 covers the technical and safety requirements for CNG fuelling stations, including slow-fill and fast-fill systems, fixed and mobile storage (daughter stations), public and private access, and multi-fuel stations. It includes equipment from the downstream gas supply connection up to (but not including) vehicle fuelling nozzles, and also applies to portions of stations dispensing CNG derived from liquefied natural gas (LCNG) in conjunction with ISO 16924. The standard assumes odorized incoming gas and contains additional requirements where gas is unodorized.

General information

• Status: Withdrawn (superseded/replaced by a later edition published 2026).
• Publication date: 13 December 2016 (Edition 1, 2016).
• Publisher: ISO (International Organization for Standardization).
• ICS / categories: 75.200 (Natural gas engineering).
• Edition / version: Edition 1 (2016).
• Number of pages: 43 (original ISO publication).

Scope

ISO 16923:2016 applies to CNG fuelling stations supplied with natural gas (including biomethane and other methane‑rich gases that meet local regulations or the gas‑quality parameters in ISO 13686). It covers station design, construction, safety, control and instrumentation, operation, inspection and maintenance, and applies to both public (self‑service or assisted) and private stations with slow‑fill and fast‑fill capability. The standard includes requirements for stations using LCNG (in combination with ISO 16924) and for stations with fixed or mobile storage, but excludes small domestic refuelling devices without buffer storage and does not define vehicle fuel nozzles. For unodorized gas additional safety provisions are specified.

Key topics and requirements

• Station layout and structural considerations for CNG equipment and storage.
• Design and selection of compressors, storage (fixed and mobile), dispensers, piping and pressure‑regulating equipment.
• Safety systems: leak detection, ventilation, emergency shutdown, grounding, bonding and explosion mitigation measures.
• Instrumentation, control and metering requirements for safe and accurate fuel delivery.
• Operational procedures: commissioning, routine operation, inspection, testing and maintenance regimes.
• Gas quality and compatibility considerations referencing ISO 13686 (gas quality parameters) and coordination with ISO 16924 for LCNG/LNG aspects.
• Specific provisions for unodorized gas and for multi‑fuel station arrangements.

Typical use and users

Used by CNG station designers and engineers, site owners and operators, equipment manufacturers and suppliers, safety and compliance officers, inspection bodies, regulatory authorities, consultants, and fleet managers deploying CNG vehicles. The standard guides safe installation, commissioning and ongoing maintenance to reduce operational risks and ensure regulatory compliance.

Related standards

Key related standards and documents include ISO 16924 (LNG fuelling stations and LCNG practice), ISO 13686 (natural gas — quality designation), and other ISO and regional standards on gas measurement, gas composition, vehicle interface fittings, and pressure equipment. The technical work is coordinated under ISO/TC 340 (Fuel, natural gas and related technologies).

Keywords

CNG, compressed natural gas, fuelling station, gas station design, LCNG, LNG, station safety, dispensers, compressors, gas quality, ISO 16923.

FAQ

Q: What is this standard?

A: ISO 16923:2016 is an international standard that specified requirements for the design, construction, operation, inspection and maintenance of compressed natural gas (CNG) fuelling stations for vehicles.

Q: What does it cover?

A: It covers station layout, equipment (compressors, storage, dispensers, piping), safety and control systems, operational and maintenance practices, and requirements for different station types (slow/fast fill, fixed/mobile storage, public/private access). It excludes domestic refuelling devices without buffer storage and does not define vehicle fuel nozzles; LCNG aspects are coordinated with ISO 16924.

Q: Who typically uses it?

A: Engineers and designers, station operators, equipment manufacturers, safety inspectors, regulators, consultants and fleet operators involved with CNG refuelling infrastructure.

Q: Is it current or superseded?

A: The 2016 edition has been withdrawn and superseded by a later edition published in January 2026 (ISO 16923:2026). Users should refer to the 2026 edition for the current requirements.

Q: Is it part of a series?

A: Yes — ISO 16923 sits with ISO 16924 (LNG and LCNG fuelling stations) and other standards addressing gas quality and station components; these documents together cover a comprehensive set of requirements for natural‑gas vehicle fuelling infrastructures.

Q: What are the key keywords?

A: CNG, natural gas fuelling stations, fuelling station design, safety, compressors, dispensers, LCNG, LNG, gas quality, ISO 16923.