. Railway mechanical engineer . k shop air line- can usuall)- be detected when Fig. 4—Double Y Branch Fitting Provides for Three Connectionsand Prevents KinVclng the Hose tween the hose and the wrapping by compressing the hoseand escaping at the end of the wrapping. It was also found that in the majority of shops the cut-out cocks to which hose were connected usually were arrangedhorizontally, causing the hose to bend sharply just at theend of the inserted nipple. This abuse, illustrated at D, , usually causes a fracture of the fabrics at that pointand it has been found much more satisfac
. Railway mechanical engineer . k shop air line- can usuall)- be detected when Fig. 4—Double Y Branch Fitting Provides for Three Connectionsand Prevents KinVclng the Hose tween the hose and the wrapping by compressing the hoseand escaping at the end of the wrapping. It was also found that in the majority of shops the cut-out cocks to which hose were connected usually were arrangedhorizontally, causing the hose to bend sharply just at theend of the inserted nipple. This abuse, illustrated at D, , usually causes a fracture of the fabrics at that pointand it has been found much more satisfactory to have hoseconnections in a vertical position or at an angle of 45 that the hose will hang straight down or assume a long,gradual curve to the floor. A double Y branch fitting (Fig. 4) shows an ideal arrange-ment when fitted up with three J/^-in. cut-out cocks. Thispermits of three hose connections feeding from one mainwithout restricting the flow of air or interfering with theefficiency of the air Fig. 5—Examples of Corrosion in 3-in. Overhead Air Line inRoundhouse macliincry is not running and tlie shop is quiet. It is dif-ficult, liowever, to detect leaks in the overhead lines in theroundhouse due to the usual noises of the blowers andescaping steam. The chemical action of the gases andcondensed steam cause these lines to deteriorate veryrapidly and frequent and careful inspection is necessary. Air should be shut off from sections of the shops whereit is not required and from all the shop lines at night ordays when shops are not operating. Valves should be in-stalled in suitable locations, so that different sections of theshop can be isolated to facilitate repairing the air lines. Outside lines should, if jwssible, be kept above is frequently found that air lines are buried from sixinches to three feet deep, making inspection practically im-jx)ssible, and specific instances have been known whereleaks of such a magnitude as to practi
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
