Regulation 70 Work in boilers, etc
No work shall be permitted in any boiler, boiler-furnace or boiler-flue until it has been sufficiently cooled to make work safe for the persons employed.
Before any person employed enters any steam boiler which is one of a range of two or more steam boilers—
all inlets through which steam or hot water might otherwise enter the boiler from any other part of the range shall be disconnected from that part, or
all valves or taps controlling such entry shall be closed and securely locked.
While persons employed remain in any steam boiler to which paragraph (2) of this Regulation applies all such inlets as are referred to in that paragraph shall remain disconnected or all such valves or taps as are therein referred to shall remain closed and securely locked.
No person employed shall be allowed or required to enter or remain in, and no person shall enter or remain in, any steam boiler to which paragraph (2) of this Regulation applies unless the provisions of that paragraph are being complied with.