The Jersey City news. (Jersey City [N.J.]) 1889-1906, 1898-01-14
BOARD ar Sartk ItisT ANN wAFER
cd ~ NfSkHONEtES
(OFFIC1AL pROCEEDINGSe
IConftnued.5
CONN trfuJt1ftNG

rOss n isxI0N EsrS.
OFFICIAL PROcEEDINGs.e
Iesontinuede5
CONNECTIONS.
Where two steel pipes are laid they are
to be connected at proper points and IN
such manner that any section OF eitner
pipe between such connections may pc
shut off and empfied in order 70 pc
cleaned. Inspected and repaired without
interfering with the flow of waterfn any
Of the other sections. Where hut one pipe
proper provisions must be smade
for such connections with a second pipe,
so that said connections can be mace
without interfering with the flow Of water
be made or provided for immediately be-
low any intake dams. also on the river
crossing Of the Passaic and Hackensack
Rivers. On the opposite bank al sucn
crossings a single gate must be placen N
each conduit Other Ike con n &c 36as
there shall nowhere be q. stretch exceed
ing five miles in length without such con-
n%ections or provision for such a conhec-
ton.
Gates or stop valves are to be Furnished
and so placed as to divide each pipe inlo
tons, and preferably are to be located OF
suinmfts All gates are to be i~ron-bodied,
bronze-mounted double gates, tested 70
Hanged joints. All such gates or stop
valves and all other fittings used on the
conduits shall be equally capable with the
conduit adjacent thereto TO resist any
pressures or strains to which they may
be subjected.
All the composition metal used, except
ing the valve stem, shall be composed OF
eighty-five per cent. copper, ten per cent;
tin and five per cent. spoiter, and shali
have a tensile strength of not less man
q, 900 pounds per square inch. with five per
cent. elongation in eight dianeters anc
five per cent. reduction of area al break
ing point. The valve guides must pc
must be plain, true and smooth, SO as TO
make perfectly watertight joints. with a
very thin layer Of pure lead cement. waive
stems shall be made of bronze. having
a tensile strength OF not less than 10000
pounds per squar inch. and the screw
threads thereon shall be cut accurately
to work true and smooth throughout the
entire lift OF the valve. On the upstream
side of each main stop valve a blow-ofr
shall be placed and interlocked with the
stop valve by proper device. SO that the
blow-oT must be open before the mann
valve can be closed.
AIR VALVES.
Every summit on the pipe lire shall be
provided with an air valve of the most
approved pattern n of a size properly
proportional to the duty it has to per-
form. 1t shall be provided with a stop
valve bolted to a Hanged casting or forg-
ing riveted upon the top OF the pipe;
III IA Sti0AA o4oC 1880
on each side of every gate. They shall
be properly incased and protected from
possibility of damage from frost or mis-
chief, but so arranged as to be readily
accessible for inspection or testing.
BLOW-OFFS.
In all depressions biow.offs snail pc
located for emptying the pipe. They shal!
be provided with two 8-inch valves boited
together and to a Hanged casting or forg-
ing riveted upon the pipe. Particular
care must be taken to have the founda-
ton for both pipe and lowe secure from
risk of unequal settlement. An iron pipe
shall be provided to carry the water from
the blow-off to a natural water-course
or ditch.
The plates used in the construction of
the conduits shall in nc case be less
than o~ne-quarter of an inch IN thickness,
and the working strain due to the static
head of water to which they will be sub
jected shall. under no circumstances, ex-
coed nine thousand pounds per square
inch section. -.
The steel for the plates of the conduit
shall be Of the class called soft and
shall be made by the basic or acid open
hearth process. If by the basic open
hearth process the steel shall contain not
more than three one-hundredths per cent.
of phosphorus and four one-hundredths
per cent. of sulphur. If by the acid open
hearth process, the steel shall contain not
more tina seven and one-half %one-hun-
dredths per cent. of phosphorus and four
one-hundredths per cent. OF sulphur: me
amount of manganese and carbon to be
in such quantities as shall produce the
best results. The tensile strength Of
the steel shall be between the limits OF
(52. OO0) lfty-two thousand and $1,000 six
ty-two thousand pounds per square inch,
the test specimens to be s inches long
and Ia inches wide between measuring
points.
The elastic limit shall not be less than
one-half the tensile strength required.
The elongation to be not less than TWEEN
| ty-ive per cent, and with a reduction of
| cross-sectional area at the point of frac-
ture of not less than so per cent.
Bending test specimens cut lenguhw1se or
| crosswise from the sheets or plates to be
six inches long and one incn woe, TO pc
bent $50 degrees upon itself Wnen cold.
and hammered down fiat without sign Oh
fracture on the outside OF the DenC pof-
Punching test specimens of the sheets or
plates to be IL inches wild and not less
than ten inches long in the middle OF
which a row Of not less than eight holes,
-three-quarters of an inch in diameter,
spaced one and ~one.quarter, inches be-
causing cracks; such punching to be
made when the steel is cold.
Drifting test specimens of the sheets or
plates to be sheared three inches wide
and not less than five inches long, in
which not less than two holes, three-
quarters of an inch in diameter, spaced
two inches between centres. and one and
one-half inches from the edges, shall be
punched, and then enlarged by blows from
q sledge hammer upon a drifting pin, un-
til said holes are at least one and one
quarter inches in diameter, without caus-
ing any cracks; such engagements to be
made when the steel is cold.
The sheets or plates must also admit of
cold hamrnering or soaring to a fine edge
at the laps without cracking, and the test
pieces must furthermore stand UGH
quenching, forging and other tests as may
suffice to exhibit fully the temper sound
ness and fitness for use of the material.
The failure of said test specimens, when
finished product of any cheat or melt"
to conform to the above requirements, will
be sufficient cause for the rejection of the
| entire product of such heat or melt"
The sheets or plates shall be free from
lamination and surface defects, and be
fully up to the required gauge for thick
ness on the edges.
| tensile strength between the limits of 50,-
900 and IS, 900 pounds per square inch, with
an elastic limit of not less h $4,000
| hounds per square inch, and with an elon-
cation of not less than % per cent. in a
test bar light inches long between meas
uring points and full diameter of rivet,
and with a reduction of cross sectional
area at the point OF fracture or not lesS
than so per cent.
The material shall also be of such quail
itv as will stand bending double and fat
before and after heating to a light vel
low heat, and quenching in cold water,
without sign of fracture or the convex
surface of the bend. The quality of ma
terial of rivet rods I'M subsequent man
ufacture into rivets shall be such that
the edges of heads. of properly heated and
or cracks. All steel rivets not conform
iner IA the above requirements will be re-