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4.9.4.1.(1)
ApplicationIntent
OS1OH5OP1OH5OS1
ObjectiveOS1 Fire Safety
Attribution
(a) [F43,F01-OS1.1]
Application
Application 1: 
Measures [spill prevention ] to prevent the unintentional escape of liquids and vapours from [indoor and outdoor] processing equipment involving flammable liquids or combustible liquids.
This applies to process plants, including refineries, which contain industrial processes involving flammable liquids or combustible liquids.
Exceptions: 
except as stated in:
  • Sentence 4.9.1.1.(2), which applies to distilleries [which are required to conform to Section 4.10.], and
  • 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.
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Intent
Intent 1: 
To limit the probability of the escape of liquid or vapour, which could lead to the accumulation of vapour in sufficient quantity to form an ignitable mixture, which could lead to their ignition from a nearby ignition source, which could lead to a fire or explosion, which could lead to harm to persons.
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