Permit to Work Systems
Permit discipline to Energy Institute and HSE standard for hot work, confined space, and high risk tasks
Permit to Work
Systems
The permit to work is the formal interface where planned work meets a live hazardous facility, and when it fails the consequences are severe. The Piper Alpha disaster turned on a permit and isolation breakdown between shifts. A permit to work system is not paperwork but a control system. It forces hazards to be identified, isolations to be proven, simultaneous and conflicting activities to be cross referenced, and authority to be held by a competent person before high risk work begins, and then it closes the loop when the work is done and the plant is returned to operation. Our team designs or upgrades permit to work programmes end to end, covering the procedure and risk assessment logic, the electronic or paper permit workflow, the isolation and confined space and hot work controls, the role based training and authorisation, and the audit regime that stops the system decaying into a rubber stamp, all to Energy Institute and HSE HSG 250 standard. The aim is a system people use because it makes work safer rather than slower.
Our implementation model
A practical, phased delivery approach that runs from gap assessment through operational embedding and is built around your regulatory context.
Define PTW scope covering hazardous activities, hot work (HSG 250 / NFPA 51B), confined space (OSHA 1910.146 / EN 547), working at height (HSE WAH Reg / EN 363), lockout/tagout (OSHA 1910.147), electrical (NFPA 70E).
Design PTW procedure with hierarchy, Operator Permit (low risk), Engineer Permit (moderate), Hot Work Permit (high), Confined Space Entry Permit (very high), design forms per ISO 45001 / OSHA / HSE INDG 98.
Specify pre work checks per permit type, JSA / TRA / Last Minute Risk Assessment, gas testing (LEL / O₂ / H₂S / CO), isolation / lockout / tagout verification, fire watch deployment, rescue plan, align with task hazard analysis.
Specify authorisation hierarchy, Permit Holder (worker), Permit Issuer (qualified supervisor), Performing Authority (qualified engineer), Area Authority (operations supervisor), specify competency per role with periodic certification.
Design SIMOPS management for parallel permits in same area, clash detection, MOC trigger, deconfliction meeting, align with offshore SIMOPS guidance per OGUK / IADC / IMCA.
Design PTW audit programme, daily field audit by operations supervisor, weekly permit quality audit, monthly programme review, align with corporate HSE governance and learn from incident process.
Permit to Work in full scope
Value of Permit to Work Systems
- Prevents high risk task incidents
- Reinforces isolation and gas testing discipline
- Reduces conflicts between concurrent permits
- Improves control of contractor tasks
- Conforms to Energy Institute permit to work guidance
- Supports OSHA 1910 and HSE compliance
- Documents the permit to work system for audit
- Holds up to challenge from the regulator and the insurer
- Standardises the permit to work system across your sites
- Improves turnaround safety performance
- Strengthens contractor integration
- Supports MOC for changes that affect tasks
- Reduces the cost of high consequence incidents
- Improves turnaround efficiency
- Lowers contractor incident liability
- Supports insurance dialogue on permit discipline
Codes & standards we work to
Triggers that signal the need
Where Permit to Work Systems applies
Wellheads, separators, gas compression, FPSO topsides, produced water systems.
Distillation columns, reactors, heat exchangers, storage spheres, LPG handling.
Cryogenic exchangers, liquefaction trains, BOG compressors, storage and sendout.
Reactive systems, batch reactors, solvent handling, runaway reaction scenarios.
Boilers, HRSGs, steam headers, hydrogen systems, ammonia SCR units.
Sterile vessels, CIP/SIP, pressure fermenters, solvent recovery, spray dryers.
Tangible deliverables
- A permit to work philosophy and procedure
- Permit templates for each task type
- A role and competency matrix
- An electronic system specification where it applies
- An audit and assurance framework
- A training package
Ready to start your project?
Speak with our team to scope an engagement tailored to your facility, regulatory context, and lifecycle stage.