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Title: Replacement Of Low Pressure Systems With Special Diameter Plastic Inserts
Author: Stephen G. Chandler
Source: American Gas Association 1973
Year Published: 1973
Abstract: The Baltimore Gas and Electric Company is ihe oldest gas company in the United States. Its 4,100-mile disiribution system includes about 1,600 miles of cast-iron pipe ranging in size from 3 inches to 48 inches. Our cast iron is found in two distinct operating systems: one low pressure 7 inch WC and the other medium pressure. 1 to 10 psig. The distribution network is built around an old gas manufacturing plant with a few large medium-pressure lines acting as feeders for the very extensive low-pressure system, in the suburban areas we have a steel-pipe system operating at 99 psig fed from a 300 psig system. In Baltimore, we have had no chronic. aggravating problem with the cast iron pipe which demands its replacement. Instead, we recognized that nothing lasts forever therefore, some kind of replacement program is necessary.

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