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Fire Hazardous Area?

asked Sep 19, 2016 in Engineering by Jarredd Tomlinson (360 points)
Description of Fire Hazardous Area.

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answered Sep 19, 2016 by Jarredd Tomlinson (360 points)

A fire hazardous area should include any of the following:

  • The area within 30 ft (9.0 m) horizontally and 40 ft (12.0 m) vertically of equipment that has a high fire potential.
  • The area within 30 ft (9.0 m) horizontally and 40 ft (12.0 m) vertically of the edge of a drainage ditch or swale/ditch/trough that serves to transport spills from high fire potential equipment to a remote impounding basin.
  • For tanks, spheres and spheroids, containing flammable material, the fire hazardous area should extend to the dike wall, or 30 ft (9.0 m) from the storage vessel, whichever is greater.
  • For rotating equipment, the 30 ft (9.0 m) horizontal and 40 ft (12.0 m) vertical distance should be taken from the expected source of leakage.
  • For marine docks where flammable liquids are handled, the fire hazardous area should extend 100 ft (30 m) horizontally from the manifolds or loading connections on the pier deck.
  • When deficiencies in equipment spacing (e.g. pumps are located under pipe rack) and/or unit drainage (e.g. drainage flows under pipe rack), the project team should evaluate if expanding the fire hazardous area is warranted.

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