. Railway age gazette . ltoona, Pa. The superheater used in the tests recently made on the Penn-sylvania testing plant at Altoona was a Schmidt superheaterof the fire tube type, or an altered form of it. The normal,or what is called in this paper the standard superheater, con-sists of tubes arranged in groups or elements and located inlarge flues in the boiler. There were 32 elements in the loco-motive used in the tests. Each superheater element is made up of four seamless steeltubes having an outside diameter of 1 7/16 in. and a thicknessof in., all connected by cast steel return bends
. Railway age gazette . ltoona, Pa. The superheater used in the tests recently made on the Penn-sylvania testing plant at Altoona was a Schmidt superheaterof the fire tube type, or an altered form of it. The normal,or what is called in this paper the standard superheater, con-sists of tubes arranged in groups or elements and located inlarge flues in the boiler. There were 32 elements in the loco-motive used in the tests. Each superheater element is made up of four seamless steeltubes having an outside diameter of 1 7/16 in. and a thicknessof in., all connected by cast steel return bends to form acontinuous tube or loop. The steam from the boiler entersthe header in the smokebox, then flows into one of each of the32 superheater elements, passing twice through the hot gaseswhich surround the elements; that is to say, the steamflows to the firebo-K end of the boiler and then returns to thesmokebox end and again flows liack to the firebox end and •£-£ ir-TuLirjwsm mmmm IMIII I II I M I I I I I I I FEET. Fig. 1—Superheater Elements Special or altered forms; A, slinrt returns at header; B, 4 lengtli, 4 ; C, Yi len^h, 9 ft. long: D, Y^ length, 14 ft. long; £, single pass,19 ft. long; F, single pass dummy returns, 19 ft. long. finally to the superheater header, entering a part of the headerpartitioned off to receive superheated steam. The steam thenpasses directly to the cylinders. This and similar arrange-ments are called in this paper two-pass superlieaters. Thesuperheater elements are connected to the header by a ball-joint connection, the ends of each element being drawn up tothe header and held in place by a single bolt. In order to obtain different degrees of superheat without inany way changing the water-heating surface of the boiler orthe engine conditions, different forms of superheater elementswere used, maintaining the same superheater header and largeflues. The details of the arrangements are indicated in and 2. One element of the stan
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1913
