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4.6.6.2.(1)
OS1OP1OH5
ObjectiveOS1 Fire Safety
Attribution
Application
Application 1: 
Design, with respect to maximum working pressure, of pumps, including associated control equipment, in systems for dispensing flammable liquids or combustible liquids at fuel dispensing stations, where such liquids are transferred from bulk storage to individual or multiple dispensers by pumps located elsewhere than at the dispensers.
Exceptions: 
except as exempted in Sentences 4.1.1.1.(2) and (3), which apply to specific 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 that excessive working pressure will develop in pumps or associated control equipment, which could lead to failure of the pumps or equipment, which could lead to the escape of liquid, which could lead to the ignition of vapour from a nearby ignition source, which could lead to harm to persons.
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