The Jersey City news. (Jersey City [N.J.]) 1889-1906, 1898-07-14

quarters OF an inch IN diameter, Spaceu
one-half inches from the edges, shall be
punched. and then enlarged by blows
from q sledge hammer upon 2 drifting
pin, until said holes are at least one and
~one-quarter inches In diameter, without
causing any cracks; such enlargelnents
to be made when the steel is cold.
The sheets or plates must also admit OF
cold hanlinering or soaring to a line edge
at the laps without cracking, and the
test pieces must furthermore stand such
quenclaing, forging and other tests as
may suffice to exhibit fully the temper
soundness and fitness for use OF the ma
terial. rhe failure OF said test specimens,
when taken at random as aforesaid from
the finished product OF any heat or
melt to conform to the above require
ments, will be sufficient cause Tor the
rejection Of the entire product of such
s-heat" or melt. The sheets or plates
shall be free from Elimination and surface
defects, and be fully up to the required
gauge for thickness on the edges.
Rivet steel shall be soft and have a
tensile strength between the limits of 50,-
600 and $1,000 pounds per square inch, with
an elastic limit of not less han 10000
pounds per square inch, and with an elon-
cation of not less than rs per cent. in a
test bar eight inches long between meas
uring points and full diameter sofs rivet,
and with a reduction OF cross sectional
area at the point of fracture OF not less
than SO per cent.
The material shall also be of such quail
ity as will stand bending double and hat
before and after heating 10 a light yell
low heat, and ~quenching in cold water,
without sign of fracture on the convex
surface of the bend. The quality of ma
terial of rivet rods and subsequent man
ufaeture into rivets shall be such that
the edges of heads. of properly heated
and driven rivets shall be free from
checks or cracks. All steel riyets not
conforming to the above requirements
All rivetlng in the shop must be lone
with hot steel rivets by steam, COM
pressed air or hydraulic machinery, exert
ing a slow pressure and retaining it suffi-
GENTLY to perfectly form the rivet heads
before the metal loses its red color.
All rivets when driven must fit the
form and size as will be directed by the
Engineer.
Care must be taken to lave the rivets
at the right heat to produce the best and
most solid work, and any rivet that may
at any time or place be found defective
or appear to have been overheated. shall
be cut out and replaced at the contrac-
tors expense by one which is sound and
acceptable. All rivet heads must be per-
feet in form and truly concentric with the
shank or shaft.
in the field, for attaching castings, etc,
to the pipe, and for all work in the shop,
shall be Of the, quality described above,
most workmanlike manner in every re-
spect. All provisions herein contained re-
lating to riyeting done in the shop, shall
cttO NREAS 80 80 ~ - '
driven IN the field or along the line of
conduit.
rust and kept under cover from the time
of manufacture of the sheets or plates
until the completed pipe is dipped and
coated.
AT the factory the plates must be under
cover at the pipe shops and must be kept
under roof and cover until ready for ship
ment and in no way exposed to the
weather or to moisture. In cases of ac-
eidental. rusting the rust must be re-
moved from the plates before proceeding
with the manufacture OF the pipe. a.
alignment and grade of the conduit. the
plates must be cut and punched to the re-
quired lines for forming a slight oblique
angle at the circular seams of as many
courses as may be needed to produce the
given total detection or curvature in each
locality. Curves shall in no case exceed
ten degrees of curvature.
All other special pieces required for the
conduit such as closing pieces, sections
containing openings for man-holes, blow
offs and air valves, and pieces involving
any other kind of boiler-makers' work,
shall be manufactured in the best n
most approved manner. All openings for
must be provided with suitable reinforce
ment. rings. or plates, cut, punched and
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 iange of the
castings or forgings, and be held in place
by the rivets which pass through said
ffange and the conduit.
Openings for H~ar-holes, blow-offs, air
valves, etc, will be cut and river holes
punched in the pipe shop and the riveting
of the same done in the shop.
All riveted seams and joints Of every
description shall be thoroughly caulked.
both on the inside and outside of the pipe
in the best and most workmanlike man
ner for first class boiler work. while for
the necessary distance from all laps the
seams shall be both Clipped and caulked
During the manufacture of the pipe,
sample lengths. to be selected by the En-
gineer 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 Die the pipe os i must ! be ns1 thoroughly oiled
The pipe when laid shall also be tested
under a pressure of 30 per cent. greater
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 all the 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 a temperature
of 800 degrees Fahrenheit. The metal must
reach the same temperature as the bath
at its first dipping and may be heated
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 thoroughly covered and protected by
the coating. All possible care must be ex-
ercised not to injure the coating in han
ding the pipe. Whenever the coating is
injured in transportation or by handling,
asphaltum paint acceptable to the En-
gineer must be Immediately applied to
the injured portion. Such paint must also
be applied to all field rivets.
Other processes of coating or protect
that they are in all respects equal in
efficiency to the asphaltum coating here
in specified and are acceptable to the
The pipe shall be constructed with
taper Joints. the end of each section
inserted within the end of the next sec
ton toward the point of delivery of water.
All longitudinal seams are to be double
riveted.
ed at intervals of about one thousand
No bipe shall be covered in until the
same shall have passed inspection within
and without and all defects have been
renedied.
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 shall be
made in the most thorough. ard substaH-
tial manner. Plans for this work must
be approved by the Engineer and the
work must be performed under his SUI
pervision and to his entire satisfaction.