FACTORIES AND MACHINERY (STEAM BOILER AND
UNFIRED PRESSURE VESSEL)
Regulation 42. Steam tests.
(1) Every steam boiler inspected for the first time and every other steam boiler of which the
authorised safe working pressure has been altered shall be tested under steaming conditions to
the satisfaction of the Inspector.
(2) A steam boiler other than a water tube steam boiler shall be tested with the safety valves set
at the authorised safe working pressure under full steam and firing for at least ten minutes with
the feed water and the stop valve closed. Where the accumulation of pressure during such test
exceeds ten per centum of the authorised safe working pressure of the steam boiler the area of
the safety valves shall be considered insufficient, and a certificate of fitness for that working
pressure shall not be granted.
(3) When witnessing a safety valve test an Inspector shall use the standard pressure gauge
supplied for his use unless he is satisfied that the steam boiler pressure gauge is accurate.
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