|| Every newly registered boiler and every
other boiler of which the working pressure has been altered
shall, before the issue of an original or renewal certificate
for such boiler, be tested under steam to the satisfaction
of the Inspector.
||at the time of test the safety valves shall
be left free and capable of being adjusted to the approved
||After adjustment of the valves to the correct
blowing pressure the boiler shall be tried under full
steam and firing with the feed water shut off and the
stop-valve closed, during which time the Inspector shall
note the accumulation of pressure and other details of
the test as well as the loading and adjustment of the
In the case of water tube boiler or boilers fitted with
super heaters, the feed water connection and stop valve
need not be shut off and if the total safety valve are
is lifted and found to be adequate by calculations, the
requirement of the accumulation test may be assumed to
have been satisfied if the valves are or have been found
so adjusted that at least one safety valve on each boiler
shall lift at or below the designed working pressure of
the boiler and all valves shall lift so that all steam
which can be generated by the boiler can be discharged
with a pressure rise not exceeding 10% of the designed
||Before the safety valve test, the Inspector
shall satisfy himself that the water gauges are in working
order and that the feed apparatus is capable of supplying
the boiler with sufficient water.
||Where the State Government does not require
a person-in-charge of a boiler to hold a certificate of
competency, the Inspector may, when he thinks fit, satisfy
himself by questioning or by practical test whether the
person-in-charge of the boiler understands the use and
purpose of the water gauges, the pressure gauge, the safety
valves, the feed water-supply and blow down.
||When witnessing safety valve test, Inspectors
shall use the standard pressure gauges supplied by the
Chief Inspector unless the boiler pressure gauge has,
since the time of inspection, been tested and found correct
with an authorized testing machine.
NOTE:- A steam test is primarily intended for the
purpose of ascertaining by actual test whether the safety
valves are sufficient to reliever boilers effectively
of excess steam and whether they operate at the time when
the maximum working pressure is reached. Inspectors should
always send to the owner due notice of the date fixed
for the steam test.
On completion of the test the Inspector should enter all
details in the Memorandum of Inspection Books.
||No steam gauge shall be used without a
syphon filled with water between it and the boiler.
||When the accumulation of the maximum working
pressure, the area of the safety valves shall be considered
insufficient, and a certificate shall be refused until
the safety valve area is increased.
||An Inspector may, when visiting a factory
for any purpose, verify the correctness of the safety
valves and pressure gauge of any boiler under steam by
comparison with him standard pressure gauge.