The Art of Lead Burning / A practical treatise explaining the apparatus and processes.

by C. H. Fay

The Lap Seam on Round Pipe.

Fig. 33.—Preparing for a Lap Seam.

Fig. 34.—Burning a Lap Seam on Round Pipe.

This seam is used almost exclusively on pipe in a vertical position, and is similar to the horizontal lap seam. The pipe is prepared by spreading the lower piece of pipe with a drift plug one size larger than the size of the pipe used. The end of the pipe intended to enter this socket is rasped to a bevel edge, as shown at a, Fig. 33. This end is then shaved clean, as is also the inside of the socket. The pipe is then placed into the socket, which is then dressed up tight against the inserted pipe, as shown in Fig. 34. The exposed edge is then cleaned and burned, as described for horizontal lap seams.