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  1. DTR1968

    NFPA 13 Clause 12.5.1

    Hi All, Can anyone provide clarification on NFPA 13 12.5.1 where it states 30% increase in area shall be applied to Dry Pipe & Pre Action Systems. Does this include Single Interlock Pre Action Systems and is there a clause in NFPA 13 that clarifies? Thanks Dave
  2. DTR1968

    NFPA 15 Tank/Vessel Run Down

    Dear All, We have a situation where our customer has specified the area of operation for a Storage Tank Deluge System for exposure protection without including the area for rundown i.e. the area of coverage to which the design density is applied is calculated by the area covered by the Spray...
  3. DTR1968

    NFPA13 Single Interlock Pre Action Area of Operation

    Hello All, Can someone please advise if the requirement to increase the area of operation by 30% is applicable to Single Interlock Pre Action Systems? I can see from the Code that it is a clear requirement for Dry Pipe and Double Interlock. My application is a non storage environment and the...

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