Hot Work Permit

“PSM standard ascertains that a system is in place to prepare and issue hot work permits before conducting hot work activities (welding, grinding, or using spark-producing equipment). The permit requires dates authorized for hot work, the equipment involved in the work, a system to maintain and document certification, identification of openings where sparks may drop, the types and numbers of fire extinguishers, identification of fire watches, an inspection before the work, authorization signatures, identification of flammable materials in the area, verification that the surrounding area is not explosive, verification that combustible materials are removed or covered appropriately, identification and closure of open vessels or ducts, and verification that welded walls are not flammable.”

Reference: Daniel A. Crowl & Joseph F. Louvar. Chemical Process Safety: Fundamentals with Applications, 3rd edition. pg 72-73

 

“Permits are used to control non-routine activities conducted in potentially hazardous environments. Hot work permit prevents the ignition of flammable or combustible gases or liquids in a work environment. Hot work operations include welding, grinding, torch cutting or soldering, and any other ignition sources. These permits are valid for only one shift at a time.”

Reference: Daniel A. Crowl & Joseph F. Louvar. Chemical Process Safety, Fundamentals with Applications, 3rd edition. pg 583 

Management/Operational Integrity/Safe Work Permit