NAC455C.212. Doors, latches and fastenings.

Latest version.

     1. A watertube boiler must have firing doors which open inward, unless the doors are provided with substantial and effective latching or fastening devices or are so constructed as to prevent them from being blown open by pressure on the furnace side.

     2. Latches or fastenings must be of the positive self-locking type. Friction contacts, latches or bolts actuated by springs must not be used. The requirements for latches or fastenings do not apply to coal openings of down-draft or similar furnaces.

     3. All other doors except explosion doors not used in the firing of the boiler may be provided with bolts or fastenings in lieu of self-locking latching devices. Explosion doors, if used and if located in the setting walls within 7 feet of the firing floor or operating platform, must be provided with substantial deflectors to divert the blast.

(Added to NAC by Div. of Industrial Relations by R101-02, eff. 12-15-2004)

                    
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