(1) Every steam boiler and every unfired steam
generator shall be provided with not less than two safety valves of
adequate capacity. Provided that the Administration may, having regard
to the output or any other features of any steam boiler or unfired
steam generator, permit only one safety valve to be fitted if satisfied
that adequate protection against overpressure is thereby provided.
(2) Every oil-fire steam boiler which is intended
to operate without manual supervision shall have safety arrangements
which shut off the fuel supply and give an alarm in the case of low
water level, air supply failure or flame failure.
(3) The Administration shall give special consideration
to steam boiler installations to ensure that feed systems, monitoring
devices, and safety provisions are adequate in all respects to ensure
the safety of boilers, steam pressure vessels and steam piping arrangements.