pa1778data.pdf
pa1778data.pdf
pa1778data.pdf
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U.S. STEEL DUQUESNE WORKS<br />
HAER No. PA-115<br />
(Page 184)<br />
intermediate transfer table and cradle; a draw furnace of the<br />
same dimensions as the heating and holding furnace; a draw-<br />
holding furnace of the same dimensions as above; and a run-out<br />
table with cradle.<br />
Installation date: 1962.<br />
I. Ajax Mangnethermic Induction Line: Manufactured by Ajax<br />
Inc., the mangnethermic induction line was also used to harden<br />
and temper bars. Laid out on a straight line from north to<br />
south, the equipment making up the line consists of a load table;<br />
a motor-driven chain conveyor which transfers bars from the load<br />
table to a roller type in-feed conveyor line which is located<br />
just west of the load table; four electric heating coils; a ring<br />
type spray quenching facility complete with guide rollers for<br />
holding the product to be heated and quenched; and a roller type<br />
discharge table onto which are attached cradles from which the<br />
finished bars are picked up and transferred to the finishing and<br />
testing equipment by an E.O.T. crane.<br />
Installation date: 1962.<br />
J. Finishing and Testing Equipment: Located within the heat<br />
treatment plant building are a number of pieces of equipment used<br />
for finishing and testing bars. These include gag presses, bar<br />
straighteners, hack saws, abrasive cut-off machines, bar turners,<br />
centerless grinders, hardness testers, and a 25-ton scale. The<br />
following gives the general location and manufacturer (when<br />
possible) of the equipment within the building:<br />
1. Gag Presses: There are a total of two hydraulic gag<br />
presses in the building. Laid out on a north-south axis, gag<br />
press No. 1 is located 59' west of the continuous electric heat<br />
treating line's tempering furnaces. Gag press No. 2, also laid<br />
out on a north-south axis, is located approximately 45' south of<br />
the continuous gas fired heat treating line. Both presses<br />
consist of an entry table, a gag press station, and a delivery<br />
table. Each gag press is approximately 100' long.<br />
Installation dates: 1943 and 1962.<br />
2. Bar Straighteners: The building contains four two roll<br />
bar straighteners manufactured by Medart Inc. Bar straightener<br />
No. 1 is located 20* east of gag press No. 1 and is laid out on a<br />
north-south axis. Bar straightener No. 2, also laid out on a<br />
north-south axis is located 20* east of bar straightener no. 1.<br />
Bar straightener no. 3 is located 56' from the western wall of<br />
the transfer bay and is laid out on a north-south axis. Bar<br />
Straightener no. 4, laid out on a south-north axis, is located<br />
82■ from the eastern wall of the production bays in the southern<br />
end of the building. Each straightener is approximately 85' long<br />
and consists of an entry table, two roll station, and a delivery