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Canada
1.0
Purpose
The purpose of this Procedure is to establish minimum requirements for safely isolating piping and
equipment.
The installation and use of ice plugs, mud plugs, etc. or hot tapping during pipeline construction or
maintenance is not within the scope of this document.
2.0
Hazards to Mitigate
Explosion
Fire
Hydrates/frozen valves
Liquids
Oxygen deficient or enriched atmosphere
Oxygen introduction to flare systems
Pyrophoric material
Releases from pressurized systems
Sparking
Static electricity
Toxic gas
Trapped pressure – line of fire
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