File:Pacific service magazine (1918) (14780186431).jpg

Identifier: pacificservicema1019paci (find matches)
Title: Pacific service magazine
Year: 1912 (1910s)
Authors: Pacific Gas and Electric Company
Subjects: Pacific Gas and Electric Company Electric utilities Electrical engineering Public utilities
Publisher: San Francisco : Pacific Gas and Electric Company
Contributing Library: San Francisco Public Library
Digitizing Sponsor: San Francisco Public Library

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Text Appearing Before Image:
16-inch cast-iron cement-joint pipe line,Fresno, Cal. started at pipe laying. The pipe is low-ered to the ditch bottom, spigot ends ofpipe are placed in bells and forced home.The grade of pipe is determined by leveland, if necessary, properly blocked tothis level. Blocking is placed just back ofthe bell and a few feet in front of same.Blocks are best when made from creo-soted pine or redwood. Never should apipe be graded by tamping dirt under it.When pipe-laying men have made someheadway, the calkers or joint makers areput to work. JOINTS Cast lead and cement are practically theonly materials used, and with good yarneach makes a satisfactory joint. Goodyarn is essential and only genuine hemprope such as the standing rigging of sail-ing vessels should be used. 70 Pacific Service Magazine
Text Appearing After Image:
Welder at work in the ditch. In making the lead joint, the yarn isfirst twisted into a roll large enough torequire driving into the joint; it is thenevenly driven around the joint so as tomaintain the spigot in the exact center ofthe bell. After half the bell has been filledwith yarn a lead runner is slipped aroundthe pipe, flush up to the bell, and held atthe top by a stamp, leaving an openingfor pouring the hot lead. In the mean-time tlie lead is melting in the furnacepot; care must be taken not to burn thelead, it should be hot enough to just chara stick of wood thrust into it. The moltenlead is poured through the aperture atthe top of the lead runner and the jointis cast. Joint after joint is thus done,(lalkers follow along and set the lead byproperly going around each joint withchisel and hammer and leave same withan even surface, and so closelv driven that the lead appears to be welded to theiron. Cement is the ideal joining material.It is cheap, strong and easy to make. Itcosts

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