. The art of lead burning; a practical treatise explaining the apparatus and processes. Fig. 32.—Joint Prepared for Through Burning. placed on the inside to prevent lead running intothe pipe, the two ends when butted will presenta V-shaped groove, as shown in Fig. 32, reach-ing all around the pipe. The burning is com-menced at the bottom, as shown in Fig. 31, andthe two ends securely imited. The groove is thenfilled by burning on additional lead from a thincleaned strip until the groove is filled and the pipemade as heavy and strong at this point as any-where on its entire length. THE ART OF L
. The art of lead burning; a practical treatise explaining the apparatus and processes. Fig. 32.—Joint Prepared for Through Burning. placed on the inside to prevent lead running intothe pipe, the two ends when butted will presenta V-shaped groove, as shown in Fig. 32, reach-ing all around the pipe. The burning is com-menced at the bottom, as shown in Fig. 31, andthe two ends securely imited. The groove is thenfilled by burning on additional lead from a thincleaned strip until the groove is filled and the pipemade as heavy and strong at this point as any-where on its entire length. THE ART OF LEAD Lap Seam on Round Pipe. 103 This seam is used almost exclusively on pipein a vertical position, and is similar to the hori-zontal lap seam. The pipe is prepared by spread-ing the lower piece of pipe with a drift plug one.
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