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4.1.8.2.(2)
ApplicationIntent
OS1
ObjectiveOS1 Fire Safety
Attribution
[F01-OS1.1]
Application
Application 1: 
Transfer of Class I liquids into storage tanks from the top of the tank, in buildings, structures and open areas.
Exceptions: 
except:
  • as exempted in Sentences 4.1.1.1.(2) and (3), which apply to unique hazards in process plants, transportation, oil burning equipment, farms, isolated construction projects, and aerosol products,
  • when the conditions in the vapour space are such that it reduces the probability of the ignition of flammable vapours, as provided in Clause 4.1.8.2.(3)(a), and
  • when the liquid being transferred has a minimum conductivity that reduces the probability of the accumulation of static electricity, as provided in Clause 4.1.8.2.(3)(b).
Application 2: 
This also applies to:
  • the filling of tank vehicles and tank cars through open domes of bulk plants, as required in Sentence 4.7.4.6.(1), and
  • the loading and unloading of tank vehicles, as required in Sentence 4.11.3.3.(1).
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Intent
Intent 1: 
To limit the probability that the free-fall or splashing of liquid as it enters the tank will lead to the buildup of static electric charges, which could lead to the ignition of vapour, which could lead to harm to persons.
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