Leadership

USE OF CEMENT JOINTS FOR CAST IRON WATER MAINS

Issue 1 and Volume 63.

USE OF CEMENT JOINTS FOR CAST IRON WATER MAINS In 1912 the city of Long Beach, Cal., began the use of cement joints with its cast iron water pipe. At the present time the city has sixty miles of mains, ranging from 4 inches to 24 inches in diameter, laid with joints of this type. All these pipes are under pressures ranging from 40 to 80 pounds per square inch and are giving perfect satisfaction. In making the cement joint the pipe is placed and spaced in the usual manner. A thin backing of the best dry jute is used instead of oakum, as the jute is free from oils and grease (which should be avoided). A Portland cement, conforming to the specifications advocated by the American Society of Testing Materials, is used. The dry cement is placed on a piece of canvas (usually a cement sack ripped open) and…

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