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NFPA 24 requires the following: "After installation, rods, nuts, bolts, washers, clamps, and other restraining devices shall be cleaned and thoroughly coated with a bituminous or other acceptable corrosion-retarding material." (NFPA 24 2016/2019 10.6.2.5)
If stainless nuts and bolts are used for the restraining glands in the underground fire main, do they still need to be coated with a bituminous material for protection against corrosion? Posted anonymously by a member for discussion. Discuss this | Subscribe
1 Comment
Robert Lujan
2/13/2019 08:15:43 am
I have ran into this. The water dept. required S.S. nuts and bolts and that is what we installed. The AHJ found no exceptions in N.F.P.A. and still made us coat the bolts. It was hard to argue that point. He also found no exceptions for "factory applied" so we had to coat the fittings. He also argued on the fact that our bituminous coating wasn't listed for sprinkler system service, so my faith in his judgement was a bit low. My opinion is still the S.S. set alone is superior to the coated carbon steel bolts. if you miss one speck or a small portion is rubbed off accidentally the bolts are compromised. The S.S. will always be S.S. although the grade will make a big difference. Leave a Reply. |
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