• 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 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
  • 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
  • How many feet does an enclosed and latching lab oven need to be from a flammable storage cabinet in a laboratory space?

    How many feet does an enclosed and latching lab oven need to be from a flammable storage cabinet in a laboratory space? NFPA 45? 
    created by acanestri
  • NFPA 45 – Compressed Gases and Cryogenic liquids in the lab. 

    5.4.1 – (5) A compressed gas cylinder larger than lecture bottle size is located so that it could prevent safe egress in the event of accidental release of cylinder contents. 5.4.1 – (6) A cryogenic contai...
    last modified by tant.jennifer
  • Can a flammable storage cabinet be stored within the 35' radius of a designated hot-work area?

    NFPA51b requires combustible materials be at least 35' away from a Hot Work area, including a "Designated" Hot Work area. NFPA51b and NFPA30 don't specifically cover whether you can store a flammable chemical storage ...
    last modified by chet.hand
  • Standard Development for Ammonia, Chlorine and Carbon Monoxide Detection and Notification

    I am inquiring if there is any standard development regarding detection of ammonia ( ice rinks) chlorine ( swimming pools) and carbon monoxide (not in residential). Normally pools and arenas have a substantial occupan...
    last modified by d_rydall
  • Grounding & Bonding Flammable Liquids

    Under the NFPA flammable liquid standard, it is necessary for the person to be grounded as well when transferring flammable liquids from one vessel into another? Is there any circumstance where the codes call for the ...
    created by ctuzzolo
  • Listed PSV manifold in NFPA 58 for LPG storage?

    I was wondering what the intent of a listed manifold for PSVs is in NFPA 58, section On our LPG bullets we have two independent lines communicating with the vapor space instead of a single manifold. Each line...
  • Control of Wood Dust From Orbital Hand Sanders

    Our shop uses wood and wood fillers.  We want to control the dust output from the different sanders we use.  We are looking for portable sanding vacuums that are compliant (OSHA,NFPA). 
    created by jbarber0001
  • 3D printing combustible dusts

    Looking for information regarding combustible dusts that are produced from 3D printing.  These can include RAD materials, as well as combustible metals that are used.
  • Abrasive Blast Booth

    What are the requirements for suppression in an abrasive blast booth?
    last modified by william.dezern
  • Use of NFPA 80A for transformer protection

    Good day,   We are looking into protecting a building from a transformer (power generation facility) that is located within 6 meters from the building. The equipment surrounding the transformer is preventing us f...
    last modified by pothier.celine
  • NFPA 51B Fire Watch 30 minutes vs 1 hour

    I was reading the new 2019 version of the NFPA 51B Fire Prevention During Welding, Cutting, and other Hot Work and in section 5.631.1 it talks about "maintaining fire watch for 1 hour after completion of hot work oper...
    created by nicolas.monroy
  • Summary of Code Requirements or Checklist

    Does anyone know of a checklist or an inventory or requirements per code that may apply to a specific industry or business. What I am really looking for is a summary list with requirements per each code. Something sim...
    created by nicolas.monroy