Railway and Locomotive Engineering . se forthe superheated steam induced fracturesin the castings. Tliis lias now been en-tirely obviated by variations in the struc-tural walls, so that the necessary degreeof is obtained sufficient to avoidany tendency to fracture. The joints of the pipe coils to the low-er face of the header are held in placeby bolts, the heads of which are shownon tlie upper face of the header, tlie lowerend of the bolt being threaded and fur-nished with adjustable nuts. pipes conveying the steam from the drypipe to the branch steam pipes the tem-perature of the
Railway and Locomotive Engineering . se forthe superheated steam induced fracturesin the castings. Tliis lias now been en-tirely obviated by variations in the struc-tural walls, so that the necessary degreeof is obtained sufficient to avoidany tendency to fracture. The joints of the pipe coils to the low-er face of the header are held in placeby bolts, the heads of which are shownon tlie upper face of the header, tlie lowerend of the bolt being threaded and fur-nished with adjustable nuts. pipes conveying the steam from the drypipe to the branch steam pipes the tem-perature of the steam is increased by itsnear contact with the heated gases find-ing their way through the enlarged flues,and reaches the cylinders at a tempera-ture as high as 650 degrees Pah., whilethe temperature on the dome may rarelyexceed 388 degrees. As may be readily imagined when alocomotive is running with the throttleclosed and no steam passing through thecoiled pipes, although the fire at suchtimes is not projecting heated air or gases. DAMPCR I rtFADER FIG. 4.—DETAILS OF SUPERHEATER APPLIANCES. sheet, where the flues are reduced, there-by allowing a larger water space. Theunit pipes have a welded return bendand the steam is again returned to theproximity of the header, where it is re-ceived at a much higher degree of tem-perature into another compartment of theheader, which is so constructed as toform joints with the two branch steampipes that lead to the cylinders. It may be stated that this somewhat in-volved compartment header has under-gone several marked improvements. Inthe earlier forms it was found that the The joint is a ground ball joint, theconcave being in the header and the ecTn-vex in the pipe collar. The coiled pipesare thus readily removable. The coils ofpipes are kept in place near the upperedge of the enlarged flues by means oflugs that rest on the bottom of the en-larged flues, and the unit tubes may bereadily withdrawn from tlicir position. It w
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyork, bookyear19
