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Over-pressure protection: HSE’s position

Over-pressure protection: HSE’s position. Stephen Murray HSE inspector, process integrity team, Offshore Division. Managing over-pressure protection. HSE’s job is to prevent people being killed, injured or made ill by work. “Those who create the risk are best placed to manage it.”.

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Over-pressure protection: HSE’s position

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  1. Over-pressure protection: HSE’s position Stephen Murray HSE inspector, process integrity team, Offshore Division

  2. Managing over-pressure protection HSE’s job is to prevent people being killed, injured or made ill by work. “Those who create the risk are best placed to manage it.”

  3. Managing over-pressureprotection Health and Safety at Work etc Act 1974 • ‘the duty of every employer to ensure … the health, safety and welfare at work of all his employees’ • ‘the provision and maintenance of plant and systems of work that are … safe and without risks to health’

  4. Managing over-pressureprotection Pressure relief devices are the last line of defence. • PSV • inadequate sizing (Grangemouth, 1987) • recent survey 4% failed to lift • Bursting disc • Gas releases through unrevealed rupture

  5. Managing over-pressureprotection HP Flare Drum Heat Exch. gas seawater

  6. LSH Managing over-pressureprotection observed pressure 4 barg Multiple failures liquid @+40m disc failure tell-tail blocked no level indication above LSH no alarm PAH ESD HP Flare Drum Heat Exch. does not trip seawater pumps gas not tight shut-off ESDV seawater

  7. Managing over-pressureprotection Relevant regulations: • ‘identify hazards and assess risks’ (Management of Health and Safety at Work Regs, 1999) • ‘maintained in an efficient state, in efficient working order and in good repair’ (Provision and Use of Work Equipment Regs, 1998)

  8. Managing over-pressure protection Offshore regulations: • ‘prevent the uncontrolled release of flammable substances’ (Prevention of Fire and Explosion, and Emergency Response Regs, 1995) • ‘identification of safety critical elements and a verification scheme’ (Safety Case Regs, 2005)

  9. Managing over-pressure protection Onshore regulations: • ‘pressure system… shall be properly designed and constructed… so as to prevent danger’ (Pressure Systems Safety Regs, 2000) • ‘a written scheme for periodic examination’including‘all protective devices’ (PSSR, 2000)

  10. Managing over-pressure protection Summary, over-pressure systems: • responsibility of ‘risk creator’; • identify hazards & assess risks; • appropriate design & construction; • maintain in working order and good repair; • examination or verification scheme to address condition.

  11. Managing over-pressure protection: HSE’s view Stephen Murray HSE inspector, process integrity team, Offshore Division

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