Overview
SIST-TS CEN ISO/TS 18683:2026 provides comprehensive guidance for safety and risk assessment related to LNG (Liquefied Natural Gas) fuel bunkering operations. Developed by CEN and aligned with ISO/TS 18683:2021, this specification supports a risk-based approach for the design and operation of LNG bunker transfer systems. The standard addresses critical interfaces between LNG bunkering supply facilities and receiving LNG-fuelled vessels.
By setting out minimum functional safety requirements and structured risk management processes, this technical specification helps ensure the safe transfer of LNG fuel in a variety of supply scenarios. It is directly applicable to both seagoing and inland trading vessels and covers shore-to-ship, ship-to-ship, and mobile-to-ship LNG bunkering operations.
Key Topics
- Risk-Based Approach: Outlines how to implement structured risk assessment techniques, identifying and evaluating potential hazards related to LNG properties, behavior, and operational environments.
- LNG Bunkering Supply Scenarios: Considers diverse transfer scenarios, such as:
- Mobile-to-ship (e.g., via LNG trucks or mobile tanks)
- Shore-to-ship (from fixed terminals)
- Ship-to-ship (from floating storage or bunker vessels)
- Hazard Identification: Focuses on hazards like LNG spills, vapor dispersion, fire and explosion risks, brittle fractures, and cryogenic burns. Special attention is given to operational risks during simultaneous operations (SIMOPS) such as cargo loading or passenger activities.
- Stakeholder Roles: Emphasizes the importance of coordination between LNG suppliers, receivers, terminal operators, port authorities, authorities, and first responders in the risk assessment process.
- Safety Zones and Control Areas: Guidance for determining safety zones, monitoring, and restricted areas to minimize exposure to hazards.
- Functional Requirements: Defines minimum requirements for bunker transfer systems, from emergency shutdown (ESD) systems to operational procedures, supported by risk assessment outcomes.
- Training: Stresses the necessity for trained and competent personnel involved in LNG bunkering operations.
Applications
Adopting SIST-TS CEN ISO/TS 18683:2026 brings significant practical value to stakeholders involved in LNG bunkering:
- Ports and Terminal Operators: Assists in planning, developing, and managing safe LNG bunkering sites and procedures in compliance with international best practices.
- LNG Suppliers and Bunker Operators: Provides structured processes for evaluating and mitigating operational and environmental risks associated with LNG fuel transfer.
- Ship Owners and Operators: Supports the safe reception of LNG as a marine fuel, with clear guidelines for collaboration during simultaneous operations and emergency situations.
- Regulators and Authorities: Establishes a common framework for risk acceptability, supporting the permitting or licensing of LNG bunkering operations.
- Emergency Services: Informs emergency response planning, ensuring readiness for potential incidents involving LNG transfer systems.
By following the principles in this standard, organizations can demonstrate compliance, enhance operational safety, and foster stakeholder confidence in the use of LNG as a sustainable marine fuel.
Related Standards
Implementers of SIST-TS CEN ISO/TS 18683:2026 should consider these related standards for a holistic approach to LNG bunkering safety and risk management:
- ISO 20519 – Specification for bunkering of liquefied natural gas fueled vessels
- ISO/IEC Guide 73 – Risk management vocabulary
- ISO 31010 – Risk management - Guidelines on risk assessment techniques
- IMO IGF Code – International Code of Safety for Ships using Gases or other Low Flashpoint Fuels
- ISO 16903 – Properties and hazards of LNG
- ISO 23306 – LNG specification as a bunker fuel
Leveraging these standards alongside SIST-TS CEN ISO/TS 18683:2026 helps ensure comprehensive risk control and operational safety throughout the LNG bunkering chain.