Introduction
HSE Critical Element Task Identification Register and Performance Standard is an important process safety deliverable used to identify the systems, equipment and activities that are critical for managing Major Accident Hazards. These are known as Safety Critical Elements and Safety Critical Tasks.
The study helps define what each critical barrier is expected to do, where its responsibility begins and ends, and how its performance should be maintained. This gives both project and operations teams a clear understanding of the barriers that must remain effective to protect people, assets, the environment and business continuity.
Methodology
- Review of Input Documents
- Identification of Major Accident Hazards
- Bow-Tie Barrier Review
- Identification of Safety Critical Elements
- Identification of Safety Critical Tasks
- SCE and SCT Mapping
- Definition of Performance Requirements
- Assurance and Verification Planning
- Preparation of Final Register and Performance Standards
Conclusion
HSE Critical Element and Task Identification connects major accident risks with the barriers required to control them. By defining clear performance standards, the study supports safer engineering design, better maintenance planning, effective barrier management and reliable asset integrity throughout the facility lifecycle.
1. HSE Critical Element Task Identification and Performance Standard for Gas Supply Reliability Improvement Project
Introduction
This case study covers the preparation of an HSE Critical Element Task Identification Register and Performance Standards for a FEED-stage gas supply reliability improvement project. The project was aimed at improving the reliability of fuel gas supply to downstream power plants by allowing online maintenance and reducing dependence on single supply routes.
The project scope included modifications at gas distribution facilities, new bypass arrangements, pigging provisions, pipeline-related changes, pressure protection review and updates to emergency shutdown and control systems.
Project Insights
- The study was performed at the FEED stage to support safe and reliable design development.
- Major Accident Hazards were identified using inputs from HAZID and HAZOP studies.
- Bow-Tie analysis was reviewed to identify preventive and mitigation barriers.
- The key hazard focus was loss of containment during fuel gas handling and modification activities.
- Important scenarios included pipeline damage during construction, hot tapping-related leak, release from new piping components and downstream overpressure.
- Safety Critical Elements were identified for containment, detection, protection, emergency response and asset integrity.
- Typical SCEs included piping systems, pressure vessels, pig launcher and receiver, corrosion monitoring, fire and gas detection, emergency shutdown valves, UPS systems and passive fire protection.
- Safety Critical Tasks included design review, inspection, construction equipment certification, hot tap planning, contractor competency checks and periodic audits.
- Performance Standards were developed to define the functionality, reliability, survivability and interdependencies of each critical barrier.
- The study ensured that each selected SCE and SCT had a clear link to Major Accident Hazard management.
Outcome
The study conducted by iFluids Engineering & Consultancy WLL resulted in a structured SCE/SCT register and a set of Performance Standards for the project facilities. It helped identify the barriers required to manage major accident risks during design, construction and future operation. The final outcome provided the project team with a clear basis for barrier ownership, verification, maintenance planning and lifecycle management of HSE critical systems.
