Code Enforcement

I agree, someone from NFPA 22 technical committee should clarify section 4.14.1, because the way is written, it says "all tanks shall have roofs" in a general section, if the intention was to talk only about steel tanks, then it should refer only steel tanks (not to use the word "all" in a general section of the standard). I´ve seen many concrete…

For the 2019 NFPA 86, the authority having jurisdiction:

Mehmet:   Good design practice would be a return bend to pendents to avoid accumulation of sediment in the drop nipples. For instance a fire department could connect its pumper to the FDC from an non-maintained fire hydrant piping, the drop nipples and pendant sprinkler head orifices could be clogged without a return bend.   It is up to the…

The "hose allowance" is the additional water demand that is added to the system when fire hose connections are present. It must always be considered to size up both the fire pump and the fire water storage, unless the sprinkler/foam system does not have fire hose connections.

I would say if the city has not adopted anything either in the fire code, development code, or what ever code the city uses, for project design.   It cannot be enforced.

Powder coating?  In the electrical code, that would fall under Class I Division I (explosionproof) or Class II Division 1 (explosionproof) and  you can't "make" it by modifying the equipment.  I'm not saying that it can't be done, but it would cost you more to have UL come out and relist it than it would to just buy the correct oven, or booth, or…