, 1884-10-22

4Adl|Al 400 COhC6lAlHS puUlC COHLTOl WITH Cto0m Doll
es on shore, as amended by law of 2nd April 1880,
: \ !, 2, and 5, the following rules nre hereby enacted
A. Subject Of the control.
Every steam boiler which is used on shore. either as o sepa.
rate apparatus for the generation of steam OF for supplying a
steam engine, is subject to public control.
From such control shall, however, besides the steam boilers
mentioned IN Ordinance of 10Th August 1884 %, the following
boilers be exempted.
l. Cylindrical boilers without internal hue and of a capaci,
ty not exceeding so gallons, provided they az are fitted with a
gauge and a feeding apparatus and () comply with the rules
enacted in the 4 last clauses of next 5 & p;
Z. Boilers OF a capacity not exceeding 125 gallons, if fitted
with a s~atety-valye with a clear escape of not less than O,O7
square inch per square foot of heating surface (cfr. s 2. LIST para
graph and the total weighing of such safety valve do not ex.
coed 10 lbs. per square inch, or that it is otherwise satisfactorily
shown to the Policemaster that the pressure does not exceed this
3. Boilers of a capacity exceeding 125 gallons, ifftted with
(a) a safety valve as that described under No. 2 and whose total
"elghtlng does not exceed Z lbs. per square inch, () an open
tube communicating with the atmosphere, not less than 3 inches
IN bore, and not more than 16 feet in vertical height from
inc lower opening of the tube, which, moreover, must not de-
scend below the water level of the boiler to a greater depth than
at least 4 inches above the bottom of the boiler.
The rules. contained i'll the 4 last clauses Of next S Is q are
applicable to the boilers mentioned under Nos. 2 and 8, in such q
manner, however, that boilers of a capacity not exceeding IS
gallons may be partly or entirely made of castiron, provided that
they are fitted with an open tube communicating with the atmos-
phere, not less than inchesi in bore, and not more than 6 feet in
he at least 4 inches above the bottom of the boiler.
B. The arrangement Of the steam boilers subject to public
control.
The HEATING SURFACE of the boiler, by which term is un-
the smoke, shall on ali points be in contact with water, in such
a manner that the Normal Water Level of the Boiler shall be at
least 4 inches abOre the heating surface.
This rule, however, does not apply to:
Any apparatus for superheatng steam, not being a part
of the boiler itself;
. Such parts of the heating surface as, owing to their com.
parative SmallnesS and their position, in the opinion Of the survey.
oS are i'll no case liable to become red hot even by exceptions.
ally strong firing.
No part of the heating surface of a boilermust be constructed
of CaStrOn or Brass. Excepted from this rule are, however, cy
lndTieal tubes of brass not exceeding 4 inches in bore.
The use of steam boilers constructed Of plates joined by
Lapping, and of steam boilers with Welded Joints upon which
the pressure of the steam acts with a tendency to tear, is for.
hidden.
The normal WATER LEVEL Of the boiler [cr. s 2, 1st para
graph shall be indicated by a line plainly marked on the boiler,
and, II tins mark Is hidden by masonry or any other covering,
also by a line plainly marked on such masonry or covering.
In order to control the waterlevel of the boiler, the boiler
shall be fitted with an apparatus showing at all times the level
of the water, and 8 Gauge Cocks or valves with suitable orifces
of escape, and the inner Orifces of which shall be placed respec-
lively 3 inches above, l inch below, and 3 inches below the nor.
separately fitted Immediately on to the boiler, the joint commune
cation between them and the boiler shall be effected by pipes of
from to 3 inches i'll bore.
The gaugecocks or valves shall be arranged in such a
manner that dirt or incrustatiOn may be removed by ramming
them i'll a straight direction.
The said apparatuSeS must be placed in such a manner as to
be easily seen by the engine driver.
a.
Every steam boiler shall be connected with at least one ser
VIceable FEEDING APPARATUS capable of keeping up the nor
mai waterlevel Of the boiler.
Where the supplying tube-the Feed Pipe-opens into the
boiler, the boiler shall on the outside be fitted with a separate
'ey-ctos'ng ratre to prevent the water in the boiler from running
out through the feed-pipe.
Locomotives and locomotors shall be fitted with 2 feeding
apparatuses, acting independently of each other and worked by
separate machinery, each of which shall be of sufficient capacity
to keep up the waterlevel of the boiler.
Immediate supply of a boiler from the water supply of a CITY
is as a rule not considered allowable.
Several steam,boIers belonging to the same establishment
may be supplied from a common feeding apparatus, if the appa-
ratus is OF sufficient capacity to supply as we'll each separate
boiler as all the boilers together with the necessary quantity to
water,