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Hazardous Locations -Propane Filling Station

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    Hazardous Locations -Propane Filling Station

    I have a customer that fills propane bottles inside their facility. From what I can find in NEC 2011 code classifies the entire area as Class 1 Division 2. However my customer says they abide by NFPA-72 and that only requires a 15' radius around the fill nozzle be classified and the rest of the building is standard wiring method. Does anyone else have a better understanding of this? My concern is the existing wiring outside the 15' radius is EMT, SS fittings and open faced receptacles

    #2
    Other than the fact that NFPA 72 isn't a basis for classification, I don't know enough about the operation to make much of a comment.

    Propane is one of the nastiest common volatiles out there. Under the right conditions, it drops like a rock, doesn't diffuse readily and it can carry several hundred feet while remaining ignitable.
    [COLOR=black]"Bob"[/COLOR]
    Robert B. Alexander, P.E.
    Answers based on 2017 NEC unless otherwise noted.

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      #3
      NFPA 58 would likely be the applicable code to classify the area. Unfortunately I don't have a copy with me

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        #4
        I took a look at NFPA 58 2011 edition - it includes the following in table 6.22.2.2 regarding area classification of areas used for filling cylinders:

        Cylinder filling
        Indoors with ventilation Within 5ft (1.5m) in all directions from a point of transfer -- Division 1
        Beyond 5ft (1.5m) and entire room -- Division 2

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          #5
          Thank you very much.

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