The Safe Isolation of Plant and Equipment

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2 Proved isolation – Valved isolation withbleed to prove isolation effectivenessFluidEdouble blockand bleedFluidEdouble seals in asingle valve body witha bleed in betweenFluidEsingle blockand bleedNote for COMAH substances a minimum ofdouble block and bleed is expected
3 Non-proved isolation – Valved isolationwith no provision to prove effectivenessFluidEdouble valveFluidEsingle valve
Page 1: Health and SafetyExecutiveKey aspec
Page 5 and 6: Minimising Violations• Establish
Page 7 and 8: Design - New Plant (2)• The expec
Page 9 and 10: Plant identification• All items r
Page 11 and 12: Valves• Valves used for isolation
Page 13 and 14: Expected isolation standards for CO
Page 15: Types of isolation - 1 Positive iso
Page 19 and 20: Example 1 - 4” steam main at 12 b
Page 21 and 22: Location factorTable E - Location F
Page 23 and 24: So Isolation Baseline is IIOutcome
Page 25: Example 3 - Process gas toxic at 0.
Page 28 and 29: Outcome factor BLocationFactorRelea
Page 30 and 31: Example 4LPG pipe 75mm diameter.•
Page 32 and 33: Instrument isolation• The most co
Page 34 and 35: The way forward (2)• Write down p
Page 36 and 37: Ask Yourselves ?• Have you traine
Page 38: Thank YouAny Questions?

The Safe Isolation of Plant and Equipment

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