. Electric railway journal . SUPERHEATERS INSTALLED IN BOILERS OF SEVERAL TYPES: (A) VERTICAL WATER-TUBE BOILER; (B) CROSS-DRUM TYPE BOILER; (C) HORIZONTAL RETURN TUBULAR BOILER; (D) HORIZONTAL WATER-TUBE BOILER. SUPERHEATER HEADER SHOWING METHOD OFATTACHING UNITS lector of the superheated steam. The headers are ofsteel and are located outside of the hot gas path, usuallyoutside the boiler setting proper. The superheating units are of heavy cold-drawnseamless steel tubing, bent in such form as to providefreedom for expansion and contraction. They are con-nected to the headers by means of ball-
. Electric railway journal . SUPERHEATERS INSTALLED IN BOILERS OF SEVERAL TYPES: (A) VERTICAL WATER-TUBE BOILER; (B) CROSS-DRUM TYPE BOILER; (C) HORIZONTAL RETURN TUBULAR BOILER; (D) HORIZONTAL WATER-TUBE BOILER. SUPERHEATER HEADER SHOWING METHOD OFATTACHING UNITS lector of the superheated steam. The headers are ofsteel and are located outside of the hot gas path, usuallyoutside the boiler setting proper. The superheating units are of heavy cold-drawnseamless steel tubing, bent in such form as to providefreedom for expansion and contraction. They are con-nected to the headers by means of ball-and-socket jointswith ground surfaces. The ball of the joint is forgedon the end of the tube, and it is faced and ground. Itfits into a ground seat in the header made at an angleof 45 deg. The ball and seat are held in close contactby means of clamps, bolts and washers. The drawings reproduced below show not only thegeneral construction of the superheater but also illus-trate some typical plans for installing it in boilers ofusual forms. A recent bulletin of the National Safety Councilcalls attention to the danger of accidents from incor-rect handling of wrenches, evidently a prolific sourceof injuries to
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