• NFPA terms (division/Zone)

    Hi,  In the NFPA 497 we speak about "division" and "zone". But, the area around figures still the same even if we speak about zones or divisions. Someone can tell what is the differences between this two terms ...
    last modified by ddufour
  • Parking Smoke system

    For parking smoke system, what is the max. number of smoke zone that can be connected to one smoke fan?
    last modified by amr.elkranfely
  • Hazardous Waster Storage

    Is there a space or building size requirement for hazardous waste that is stored onsite?  If so, where can I find more information on this topic?
    last modified by jwaite
  • Is it safe to make wet blasting on the top of crude oil floating roof tank

    if its not safe where i can find this issue from NFPA
    created by mohammedelassall
  • Bakery industrial occupancy

    Hi everyone, I'm wolontary firefigter from Croatia, and was wandering can industrial building with two flors and conveneance openings betwean them be as one compartment , and with conveneance storage of 1500m2, can al...
    last modified by dcvek1
  • shell to shell spacing

    there is a methanol storage facilities; 4 double roof tank will be constructed in common dike area with clock wise arrangement  and diameter of   each tank is supposed to be 55 meters. based on Nfp...
    created by b.jabarzade
  • Does anyone have information or a form for conducting a root cause analysis for fires you can share?

    There is a lot of RCA information available, but I have not found anything that is specifically designed for fires.
    last modified by willistowerswatson
  • Question regarding high voltage power lines

    Hi, I am looking for any guidance on separation distances between hazardous chemicals (both compressed gases and liquid oxidizers) and high voltage power lines. I have searched through the NFPA codes with little succe...
    last modified by tzeweiu
  • fm200 and inert gas systems discharge test (concentration test)

    is a discharge test  requested for the fm200 and inert gas system?
    last modified by engahmed.2010
  • Fuel Dispensers

    Does anyone have a list or know of an agency that would have list of fuel dispenser manufactures and models that meet  the NFPA30A code?
    last modified by edcollupy
  • Is the fire class in NFPA 400 ( I - V) the same as Fire Hazard ( 1 - 5) on the MSDS?

    is the fire class in NFPA 400 ( I - V) the same as Fire Hazard ( 1 - 5) on the MSDS?
  • edible oil tanks

    Dear nfpa staff i have big storage tank with fixed roof for edible vegetable cooking oil , above ground tanks.20 numbers with the same diked area. as the oil is defined a liquid class 3B. does require a fire fight...
    last modified by gatrabolsi
  • Repair Garages

    I am wondering about the applicability of NFPA 30A. Is the standard intended to apply only to automotive repair facilities (e.g., dealerships, lube shop/Firestone, etc.)  or does it include heavy machinery (e.g.,...
    last modified by jeff.churchill
  • NFPA 496 Question

    NFPA 496 Question Using a purged enclosure with general purpose equipment in a CL1 Div 2 area . If the equipment brings a combustible liquid into the purged enclosure can you use air for the purge? Would an inert p...
    created by kpenson

    NFPA 85 : #PURGE CREDIT FOR COMBUSTION TURBINE & HRSG      We have SGT 700 gas turbine followed by HRSG. HRSG is capable to run 100% firing mode also.   As per customer requirement while...
    created by ratnadeep.sinha
  • Standard specifying the maximum pressure within a valve train

    Good evening, I wanted to know if someone can support me because a client was installed a 60,000,000 BTU / hr burner. with a valve train that comes from Europe and has a filter but it does not have a solids trap or re...
    created by agsear
  • We test products so sometimes we have a number of flammable aerosols.  How many can be stored on the lab bench ?

    We test products so sometimes we have a number of flammable aerosols. How many can be stored on the lab bench ?
    created by busbyamr
  • Direct burial of liquid-tight flexible metal conduit.

    Does liquid-tight flexible metal conduit that is rated for direct burial fall under column 3 of Table 300.5?  This is in reference to minimum coverage of direct burial raceways.
    created by gilbert
  • in wood dust collection can we use spiral pipe?

    We are being told that they cannot be used due to static build up  We are also being told they are fine if bonded? Multiple grounds per length of pipe. Who is right?  We are running and okay in one of our...
    last modified by mwmcinnes
  • GFCI and Water Heater

    Are GFCI receptacles required within a certain distance of water heaters in a commercial building mechanical room?   Thanks in advance for any guidance.
    last modified by shanna.gonzales