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5.5.4.3.(1) | Application | Intent |
| OS1 | OP1 | OP1 | OP1 | OS1 | OS1 | OS1 | OS1 |
| Objective | OP1 Fire Protection of the Building or Facility |
| Attribution | |
| Application | Application 1: Control switches for exhaust ventilation systems for
power-ventilated enclosures, where, as stated in Sentence 5.5.4.2.(1):
This applies to laboratories where dangerous goods, including flammable
liquids and combustible liquids, are
used in normal laboratory operations in quantities or in a manner that creates
a fire or explosion hazard.
Application 2: This also applies where perchloric acid is heated
above normal ambient temperature, as stated in Sentence 5.5.5.5.(1).
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| Intent | Intent 1: To limit the probability that delays or ineffectiveness
in shutting off the ventilation system will result in continued air movement
in the ventilation system, which could lead to the spread of a fire in the
power-ventilated enclosure to other parts of the building, which could lead
to damage to the building. Intent 2: To limit the probability of delays or ineffectiveness in
turning on the ventilation system in the event of the accidental release of
ignitable vapours or particles, which could lead to a fire or explosion, which
could lead to damage to the building. |
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