ISO 17776:2016

Overview

ISO 17776:2016 - "Petroleum and natural gas industries - Offshore production installations - Major accident hazard management during the design of new installations" provides requirements and guidance for identifying, evaluating and managing major accident (MA) hazards during the design of new offshore oil and gas production installations. The standard applies to fixed offshore structures and floating production, storage and offloading systems (FPSO/FPU) and covers all credible hazards that could materially affect people, the environment or assets. It is intended primarily for larger new‑build projects, but its principles are also applicable to small projects, design changes and relevant onshore facilities. Mobile offshore units and subsea facility design are excluded, though their effects on an installation are considered where relevant.

Key topics and technical requirements

• MA hazard management framework: project management commitment, accountability, and a documented plan to manage MA hazards.
• Hazard identification & evaluation: structured processes (e.g., HAZID-style techniques) to identify credible major accident scenarios and to evaluate their likelihood and consequence.
• Inherently Safer Design (ISD): prioritizing risk reduction by elimination, substitution, moderation or simplification during concept and detailed design.
• Barriers and barrier management: defining protective layers (active and passive) and establishing performance standards, monitoring and revalidation.
• Risk assessment methods: selection and use of suitable techniques for screening, concept selection, optimization and detailed design phases.
• Documentation & registers: maintaining a register of MA hazards, actions management, and management of change (MOC) processes to control design and operational changes.
• Phase coverage: screening & concept selection, concept definition and optimization, detailed design and construction, and MA hazard considerations for transfer to operation.
• Informative annexes: practical tools, HAZID guidewords, barrier performance guidance and example decision‑support frameworks.

Practical applications

• Integrating MA hazard management into engineering design and project planning for offshore production installations.
• Supporting safety case preparation and regulatory compliance by demonstrating systematic hazard management during design.
• Guiding selection of inherently safer options, barrier strategies, and performance criteria to reduce potential major accidents.
• Informing procurement specifications, construction oversight and handover to operations with clear MOC and actions tracking.

Who should use ISO 17776:2016

• Project managers, design and process engineers, safety and risk engineers, HSE specialists, operators, contractors and regulators involved in offshore oil & gas development and FPSO projects.

Related standards

Use ISO 17776:2016 alongside other offshore design, structural and risk management standards and industry guidance (ISO, API and national regulator documents) to build a comprehensive offshore safety and major‑accident risk management program.