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?
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