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4.5.6.7.(1)
ApplicationIntent
OS1OH5OP1
ObjectiveOP1 Fire Protection of the Building or Facility
Attribution
[F82,F21-OP1.1]
Application
Application 1: 
Location of piping for flammable liquids or combustible liquids, where the piping enters a building.
Application 2: 
This also applies on piers and wharves, as stated in Sentence 4.8.4.1.(1).
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,
    • 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 piping defects or damage will go unnoticed, which could lead to appropriate measures not being taken, which could lead to the escape and spread of liquid, which could lead to the accumulation and subsequent ignition of vapour from a nearby ignition source, which could lead to damage to the building or facility.
Intent 2: 
To limit the probability that ground heave or foundation settling caused by the freeze/thaw cycle will lead to failure of the piping, which could lead to the escape of liquid, which could lead to the accumulation and subsequent ignition of vapour from a nearby ignition source, which could lead to damage to the building or facility.
Intent 3: 
To supersede the requirements of Sentence 4.5.6.4.(2) and permit underground piping to be located near building foundations where it enters a building.
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