. Railway mechanical engineer . til which is bolted a piece of J4 in. plate having a punched hole3 in. in diameter through its center. In placing the end of thetube against the stop the swedged portion is passed throughthis hole, where its rotation against the rough punched edgeof the hole removes all scale and dirt leaving the end whichreceives the copper ferrule in the back tube sheet smooth andclean. .After the tubes are cut to length, they are given a hydrostatictest. The machine for doing this work is adjustable for variouslengths of tubes. It consists of a wooden trough with a cylin-der
. Railway mechanical engineer . til which is bolted a piece of J4 in. plate having a punched hole3 in. in diameter through its center. In placing the end of thetube against the stop the swedged portion is passed throughthis hole, where its rotation against the rough punched edgeof the hole removes all scale and dirt leaving the end whichreceives the copper ferrule in the back tube sheet smooth andclean. .After the tubes are cut to length, they are given a hydrostatictest. The machine for doing this work is adjustable for variouslengths of tubes. It consists of a wooden trough with a cylin-der at each end; the cylinder at the rear end does not closethe tube untd it is full of water, after which the other cylinderincreases tlic pressure in the tube. This method insures theremoval of all air from the tube before the test is made, afterwhich the front cylinder raises the pressure in the tube from100 lb. per sq. in.—the water line pressure—to 300 lb. or more,depending upon the air pressure. Defective tubes are thrown. Fig. -Interior of tile Flue Shop Looking Toward the Anneali ind Loading Track cool, when it is piled. It has been found that if tubes are piledwhile the welds are still red hot, they will be bent when cold,due to the contracting of the exposed surface sooner than thatnext to the other tubes in the pile. After the intermediatepieces are welded on, the tubes are loaded on a wagon and re-turned through the window B, Fig. 3, to follow the course ofother tubes through the shop. The tubes next are placed at the piecing furnace where theends are expanded and seven inch safe ends inserted. They arethen piled at the welding furnace and welded by a Hartz fluewelder. The swedging of the ends is done at the same heatand the tubes are then piled back of and to the right of the cut-ter, ready to be cut to length. This machine has an adjustablestop to govern the length of the tubes, against the upright leg of iiut and those which withstand the test are ])iled at the a
Size: 1897px × 1317px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
