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4.5.10.5.(3)
ApplicationIntent
OS1OP1OH5
ObjectiveOS1 Fire Safety
Attribution
[F82-OS1.1]
Application
Application 1: 
Flammable vapour leakage detection devices [when a visual inspection is not practicable] used for conducting inspections [required in Sentences 4.5.10.5.(1) and (2)] on piping systems for flammable liquids or combustible liquids, in buildings, structures and open areas.
Exceptions: 
except as exempted in:
  • Sentences 4.1.1.1.(2) and (3), which apply to unique hazards at process plants, in transportation, for oil burning equipment, on farms and isolated construction projects, and the storage of aerosol products; and
  • Sentence 4.5.1.1.(2), which applies to:
    • tubing or casings and piping for oil or gas wells,
    • transmission pipelines,
    • piping for vehicles, aircraft, watercraft and portable or stationary engines,
    • piping systems in fuel dispensing stations and distilleries, and
    • piping within the scope of the applicable provincial boiler and pressure vessel codes.
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Intent
Intent 1: 
To limit the probability that vapour leakage will go unnoticed during a visual inspection, which could lead to appropriate measures not being taken, which could lead to the accumulation and subsequent ignition of vapour from a nearby ignition source, which could lead to harm to persons.
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