The Jersey City news. (Jersey City [N.J.]) 1889-1906, 1898-01-14

raflE Tfu BTdur- O. N-IIE COIiuuTfF TJEE
plates must be cut ana punched to the re-
quired lines for forming a slight obiiqne
angle al the circular seams of as uilny
courses as may be needed to prod.lse the
given total DETECTION or curvature in each
locality. Curves shall in no case exceed
ten dngrecs of curvature.
Ali other special pieces required for the
conduit, such as closing pieces. sections
containing openings for man-holes. blow
offs and air valves, and pieces frVolyfnB
any other kind Of boiler-makers' Work;
shall be manufactured in the best and
most approved manner. All openings for
~man-holes. blow-offs, air valves. ETC..
must be provided with suitable reinforce
ment rings or plates. cut, punched ana
less than five-sixteenths of an inch in
thickness, and made of the same material
as the plates for the conduit.
Said rings must fit closely between the
exterior OF the pipe and the flange OF the
castings or forgings, and be held IN pace
by the rivets which pass through said
1ange and the conduit.
Openings for man-holes, blow-offs, air
valves. ETC., will be cut and rivet holes
punched In the pipe shop and the riveting
OF the same done in the shop.
description shall be thoroughly caulked.
both on the inside and outside of the pipe
in the best and most wofkmanllNe man
1er for first class boiler work. while Tor
the necessary distance from all laps the
seams shall be both Clipped and caulked.
During the manufacture of the pipe,
SdI1pIc lellSIllS, To De selected Dy Luc LII
eineer as frequently as he may deem
necessary, shall be tested before or after
coating under a water pressure OF Two
hundred pounds to the square inch, and
shall be absolutely tight under that pres
sure; II tested before the coating is ap,
piled the pipe must be thoroughly oiled
with a coat of linseed oil.
The pipe when laid shall also be tested
under a pressure of 80 per cent. greater
than that to which it will be subjected
in normal operation, and shall be abso-
lutely tight under that pressure. All such
tests shall be made at the expense OF the
contractor, and he shall furnish allthe ne
cessary appliances and labor for their per-
Torrance to the satisfaction OF the En-
gineer. The pipes are to be thoroughly
coated by dipping twice in a bath OF re-
fined asphaltum heated to Temperature
of 300 degrees Fahrenheit. The metal must
reach the same temperature as the pain
at its first dipping and may be heated
to this temperature before dipping The
coating must be durable, smooth, glossy.
hard, tough, perfectly waterproof and
strongly adhesive to the metal, and must
show no tendency to flow when exposed
to the sun in summer or become so brit
tie as to scale IN winter. All pipe must
be BE- thoronghly eoveregd ana pro5e ef 6e e py
ercised not to injure the coating In nan
ding the pipe. Whenever the coating is
injured in transportation or by handling,
asphaltum paint acceptable to the En-
gineer must be Immediately applied 10
the injured portion. Such paint must also
be applied to all field rivets.
Other processes of coating or protect
ing the pipe may be adopted, provided
that they are in all respects equal in
efficiency to the asphaltum coating here
in specified and are acceptable to the
Engineer.
The pipe shall be constructed with
taper, joints. the end of each section
at each transverse riveted joint to be
inserted within the end of the next section
toward the point of delivery of water.
All longitudinal seams are to be double
riveted.
There shall be suitable manholes locat-
ed at intervals of about one thousand
feet on each pipe.
No pipe shall be covered in until the
same shall have passed inspection With
in and without and all defects have been
CONNECTIONS AT POINTS OF DE-
LIVERY.
Proper connections must be made to
enable the contractor to deliver the water
into Bergen Reservoirs, also directly into
the high and low service pipe systems
of the City. Such connections snail be
made in the most thorough and substan-
tial manner. Plans for this work must
be approved by the Engineer and the
work must be performed under MS su-
pervision and to his entire satisfaction.
GATEHOUSES.
A gatehouse of brick or stone, with
slate or tile roof, possessing two separate
water passages, each provided with prop
er screens, together with all necessary
gates or other ap~puItenances, must be
placed to control the flow from the res
ervoir supplying any steel pipe or ma
sonry conduit. Gatehouses of like mate
rial shall also be furnished at each point
where two parallel steel pipes are con-
nected, or where provision is made for
such connection, also at each gate or
~stop-valve on the main conduit.
Suitable gatehouses of stone masonry,
architecture and appropriate to their
surroundings shall be built at the points
of delivery at Belleville and Bergen Res
ervoirs, with proper appurtenances for
measuring, regulating the pressure OF and
delivering the water
TELEPHONE.
A telephone line shall be built connect
ing the points of delivery with the in
take or intakes of the eonduits, and
equipped with all necessary instruments
and appurtenances.
TUNNELS.
The sidewalks and arches of all tun-
inches in thickness where the tunnel Is
in earth or very loose rock, twelve inches
where in intermediate rock n eight
inches in sound rock, laid in Portland ce-
ment mortar, and the entire space be-
tween the sidewalks and the sides of the
excavation shall be filled with Rosendale
cement concrete up to the level OF the
TOP Of the arch. Above this the space
must be filed with suitable material.
carefully packed or rammed so as to
completely fill the space. Where the tun.
mel is in rock, II the DOltOm CONSISTS OIL
sound and solid rock, it may be leveled
up and smoothed and made uniform
throughout with Rosendale cement con-
crete. surfaced with a layer two inches
thick of Portland cement mortar. Where
the tunnel is in earth or unsound rock
a brick invert, sixteen inches thick, Shall
be laid at the bottom. If it shall be
necessary, in order to secure firm founda-
ton, the invert shall be laid upon a bed
of concrete. Care shall be taken to leave
the interior surface of the tunnel smooth
and free from projections.
CAST IRON.
If iron castings are used for effiuent
pipe. manholes, blow-offs, air-valves and
other connections. the metal must be re-
melted in a cupola or air furnace. and
must be of pig-iron, without any admix-
lure of cinder iron or other inferior metal,
ana shall be of a strong, tough charac-
ter, of an even grain, entirely free from
microscope. and such as will bear salts
factory drilling and cutting.
The iron for the castings shall nave a
tensile strength of at least seventeen
thousand pounds to the square inch.
Test bars, twenty-six {26l inches long,
thick, placed 1atwise and horizontal,
upon supports twenty-four CD inches
apart. shall bear a steadily increased
centre load up to nineteen hundred d900)
pounds before breaking, and shall exhibit
q DETECTION of not less than fve-six-
teenths of$an inch.
The castings shall be perfectly free
from scoria, ~sandholes, ~air-bubbles and
other defects and imperfections.
The castings shall be perfectly cleaned
and no humps shall be left on the inner
or on the outer surface.
dressed and made clean and free from
a ,rth sand and dust. which adhereS To