The Jersey City news., 1898-07-30

and not less than flve inches long, in
quarters of an inch in diameter, spaced
IS two inches between centres and one and
one half inches from the edges, shall pc
punched, and then enlarged by blows
from a sledge hammer upon drifting
pin, until said holes are at least one and
one-quarter inches in diameter, without
causing any cracks; such enlargementS
1 to be made when the steel is cold.
The sheets or plates must also admit or
cold hammering or soaring 10 nne eage
at the laps without cracking, and the
test pieces must furthermore stand such
quenching, forging and other tests as
may suffice TO exhibit fully the temper
SoundneSS and fitness for use OF the ma
terial. The 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 for the
rejection of the entire product OF such
heat" or melt" The sheets or plates
defects. and be fully up to the required
gauge for thickness on the edges
Rivet steel shall be soft and have q
tensile strength between the limits of 50,-
600 and So 1000 pounds per square inoh, with
an elastic limit of not less than 10000
pounds per square inch, and with an elon-
Il cation of not less than 28 per cent. in a
test bar eight inches long between meas
q uring points and full diameter Of rivet.
and with a reduction Of cross sectional
l 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 nat
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
ufacture 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 rivets not
conforming to the above requirements
will he rejected.
All riveting in the shop must be done
with hot steel rivets by steam, com
pressed air or hydraulic machinery, exert
ing slow pressure and retaining 1t suffi-
& GENTLY to perfectly form the rfvet heads
before the metal loses its red color.
All rivets when driven must fit the
holes completely, and have heads OF such
form and size as will be directed by the
Engineer.
Care must be taken to have 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 detective
or appear to have been oyerheated shall
be cut out and replaced at the contrac-
tors expense by one which is sound ana
acceptable All rivet heads must be. per-
| feet in form and truly concentrie with the
shank or shaft.
The rivets used to connect the cylinders
in the field, for attaching castings etc.,
to the pipe, and for Al work IN n the SHOP @
and they shall be driven In the best and
most workmanlike manner in every re-
! Spect. All PROVISIONS herein contained re-
lating to riveting done in the shop. shall
also apply as far as practicable to rivets
driven in the field or along the line of
conduit.
/ All plates and rivets must be free from
rust and kept under cover from the time
of manufacture of the sheets or plates
until the completed pipe Is dipped ana
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-
cidental. rusting the rust. must be re
with the manufacture of the pipe.
Where angles or curves occur IN lhe
alignment and grade Of the e e9nduls 6 la T. 5he la
quired lines for forming 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 and
most approved manner All openings for
rnan-hoes, nlow-offs; air N,a valves, yes, etc etc
inent rings or plates, cut, punched and
rolled to the proper form IN each case, not
less than ave-sixteenths of an lneh II
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 fiange of the
castings or forgings, and be held in place
by the rivets which pass through said
flange and the conduit.
Openings for man-holes, blow-offs, all
valves, etc, will be cut and rivet 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
ala, C~lr 10 for
I 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 Ell
gineer as frequently as he may deem
necessary, shall be tested before or after
coating under water pressure Of tive
hundred pounds to the square inch, and
shall be absolutely tight under that pres
sure If tested before the coating is ap-
Plsd the noa} Rpaf e nseed m1sa ef o oHe0
The pipe when laid shall also be tested
under pressure of 80 per cent. greater
than that to which 1t 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 all the ne
cessary appliances and labor for their per
formance to the satisfaction OF the En-
gineer. The. pipes are to be thorougnly
coated by dipping twice in a bath of re-
fined asphaltum heated to q temperature
of 800 degrees Fahrenheit. The metal must
reach the same temperature as the bath
at it's 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 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 handing,
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
at each transverse riveted joint to be
inserted within the end of the next sec
All longitudinal seams are to be double
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 within
and without and all defects have been
! remedied.
j 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 and substan-