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Ch. 30. No. 2.] Factories.

 

a suitable fusible plug or an efficient low water alarm
device:

Provided that subparagraph (ii) of paragraph (a) of this
subsection shall not apply with respect to economiscrs,
and subparagraphs (iii), (iv) and (v) of paragraph (a), and
paragraphs (b) and (c) of this subsection shall not apply
with respect to cither economisers or superheaters.

(2) In the case of a steam boiler in a ship or other
floating vessel every such boiler shall, in addition to the
foregoing provisions, have attached to it—

(a) a second safety valve as described in sub-
paragraph (i) of paragraph (a) of subsection (1) of this
section, and both valves shall be of the direct spring
loaded type;

(0) a suitable blow-off cock or valve so as to permit
the pressure inside the boiler to be reduced to atmos-
pheric pressure within a reasonable time in case of
emergency ;

(c) a salinometer cock or valve.

(3) For the purposes of subsection (1) of this section,

a lever-valve shall not be deemed a suitable safety valve
unless the weight is secured on the lever in the correct
position.

(4) No person shall enter or be in any steam boiler
which is one of a range of two or more steam boilers unless—

(a) all inlets through which steam or hot water
might otherwise enter the boiler from any other part
of the range are disconnected from that part; or

(b) all valve. taps or cocks controlling such entry
are closed and securely locked, and, where the boiler
has a blow-off pipe in common with one or more other
boilers or delivering into a common blow-off vessel or
sump, the blow-off valve, tap or cock on each such
boiler is so constructed that it can only be opened by a
key which cannot be removed until the valve, tap or
cock is closed and is the only key in use for that set
of blow-off valves, taps or cocks.

(5) Every part of every steam boiler shall be of
good construction, sound material, adequate strength, and
free from patent defect.