Reg. 334, Reg. 335, Reg. 336, Reg.
Attachment to Boiler
|Wherever practicable fusible
plugs shall be screwed into the boiler plates from the
waterside. The screwed portion shall have threads of Whitworth
form not more than 11 per inch.
||Feed check valves
shall be of the non-return type.
||Where the valve
is not of screw-down non-return type a separate screw-down
valve shall be provided.
||The discharge from
the feed check valve or from the internal feed pipe (if
provided) shall be above low water level and in the case
of Lancashire and Cornish boilers shall be at least 5
ft. beyond the fire bridge. Provided that the restriction
aforesaid regarding the position of feed discharge level
would not apply in the case of water tube boilers.
||The discharge end
of feed pipe shall be so located that it is not close
to any riveted joint of the furnace plates or of the shell.
|Feed check valves
or regulating valves shall be so arranged as to enable
them to be satisfactorily operated from the boiler
Reg. 336 A
Requirements as to feed apparatus in certain cases
|In the case of a battery of
boilers connected to a common feed range, the requirements
of regulation 281 in respect of the number of feed apparatus
shall be considered to have been fulfilled provided a
total supply of feed water, not less than the combined
maximum continuous rating of all active boilers can be
maintained even if any one of the sources of power supply