Overview
EN ISO 16923:2026 is a comprehensive international standard specifying the requirements for the design, construction, operation, maintenance, and inspection of compressed natural gas (CNG) fuelling stations for vehicles. Developed by CEN and based on ISO 16923:2026, this standard provides guidance for facilities dispensing CNG derived from natural gas or liquefied natural gas (LCNG), ensuring safe and efficient operation across various types of fuelling stations.
This standard applies to public and private CNG fuelling stations, including those with slow fill, fast fill, fixed or mobile storage, and multi-fuel configurations. It addresses natural gas quality per local regulations or ISO 13686 and incorporates sections on equipment, safety, and control devices up to the nozzle. The document specifically excludes vehicle-to-vehicle gas transfer and vehicle refuelling appliances (VRAs). Additional safety requirements are outlined for stations using unodorized natural gas.
Key Topics
EN ISO 16923:2026 covers crucial aspects for CNG station stakeholders, including:
- Design and Construction: Guidelines for planning, constructing, and modifying CNG fuelling stations. Requirements cover site layout, equipment selection, ventilation, and structural safety.
- Operation and Maintenance: Standards for fuelling procedures, routine operations, documentation, and training for competent personnel to maximize safety and efficiency.
- Equipment and Safety Devices: Requirements for compressors, buffer storage, dispensers, dryers, pressure safety systems, emergency shutdown devices, and gas detection.
- Inspection Protocols: Procedures for regular inspection and maintenance, gas detection system checks, and performance testing to ensure ongoing compliance.
- Hazardous Area Classification: Guidance for assessing and mitigating risks in station design and operation, including detailed responsibilities for zone classification and explosion protection.
- Special Configurations: Provisions for slow fill, fast fill, mobile daughter stations, fixed storage, and multi-fuel operations within the scope of applicable regulations.
Applications
This standard serves as a vital resource for diverse stakeholders in the natural gas vehicle (NGV) eco-system, including:
- CNG Fuelling Station Operators: Ensures stations comply with safety, operational reliability, and maintenance best practices.
- Designers and Engineers: Provides foundational guidance for planning new stations or upgrading existing facilities to international benchmarks.
- Equipment Manufacturers: Sets requirements for compressors, dispensers, storage vessels, and safety controls, supporting product certification and market access.
- Inspectors and Regulatory Authorities: Offers a unified framework for safety audits and regulatory compliance across the European Union and internationally.
- Transport and Logistics Companies: Facilitates expansion into CNG-powered fleets by ensuring fuelling infrastructure meets rigorous quality and safety standards.
By adhering to EN ISO 16923:2026, organizations benefit from harmonized practices, improved risk management, and the promotion of safe, reliable CNG fuelling solutions aligned with sustainability and energy transition goals.
Related Standards
EN ISO 16923:2026 references and aligns with leading international and European standards in the field, supporting comprehensive compliance. Relevant documents include:
- ISO 13686: Natural gas - Quality designation
- ISO 16924: LNG fuelling stations for vehicles (LCNG)
- ISO 834-1: Fire-resistance tests for building elements
- ISO 12100: Safety of machinery – Risk assessment
- IEC 60079 series: Explosive atmospheres protection
- ISO 15500 series: CNG fuel system components
- ISO/IEC 62443 series: Network and system security for industrial automation
Organizations planning, operating, or regulating CNG refuelling stations can utilize these standards together with EN ISO 16923:2026 to establish robust, safe, and future-ready natural gas vehicle infrastructure.
Keywords: EN ISO 16923:2026, CNG fuelling stations, natural gas vehicles, compressed natural gas, LCNG, fuelling station safety, CEN standards, station maintenance, risk management, equipment requirements.
