• 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
  • 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
  • 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
  • What is your opinion about: Safety Instrumented Fire & Gas Systems?

    Dear Sirs.- I would like your opinions about Fire and Gas Systems and Safety Instrumented Systems
    last modified by guillermov
  • NFPA 505, OSHA 1910.178

    In OSHA Standard 29 CFR 1910.178, Powered Industrial Trucks, Table N-1 References the NFPA at the bottom of the table, with Reference #'s for NFPA 505, that I have not been able to find.  Can someone help redirec...
    last modified by matthew.goodall
  • Hazardous area classification (HAC) of interstitial spaces.

    I am involved in the construction of a large plant. The plant utilizes and distributes numerous flammable liquids and/or gasses (the primary ones being ethanol and formic acid). In certain areas this distribution and ...
    last modified by rrwo
  • Electrical PPE Catagory requirements

    how do I determine PPE catagory requirements if worker is in panel, one side of panel has  240v (or less,) and on other side of same panel is live 480, however no work is to be done to the 480v side, only on the ...
    created by mr.kc.collins
  • NFPA 820 - Delineation Between Classified and Unclassified

    I have a two story WWTP where the wet well is located at the lower level, and directly above is a chemical storage area.  The chemical storage area requires and emergency shower, which requires a floor drain....
    created by gavin.don
  • I need to Buy handbook for design&installation fire protection system

    I need to use handbook for design&installation fire protection system in Building , Factory , Hospital , School on my job. (Mechanical system) Please tell me about Important handbook. I need to Buy.   1. NF...
    created by bancha
  • Fire shutter for gas house conveyor entries

    Dear all,   Does anyone have a recommendation for a fire shutter supplier for conveyor openings into and out of a gas house.   Many thanks Ross Hollands
    last modified by ross.hollands
  • Possibility of vehicle fire (before sales)

    I’m writing to ask a favor of you.   We has been discussing with Shanghai port authority to provide Automated Storage and Retrieval System (ASRS)for finished cars. FYI, we are attaching photos of the ASRS....
    last modified by noguchi