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Title: Heat Shrink Sleeves For Bell Joint Repair
Author: C. Larry Schmidt
Source: American Gas Association 1974
Year Published: 1974
Abstract: I am pleased to be here this afternoon to tell you about our experiences with a relatively new method of repairing leaking cast iron bell and spigot pipe joints operating at pressures less than 5 psig. This repair method is through the use of Thermofit Gas Repair Sleeves. The conversion to natural gas in most European countries over the last decade resulted in severe leakage problems from the drying out of the yam sealing cast iron pipe joints. This problem prompted Raychem Corporation to apply the knowledge it had gained through years of research in the field of radiation chemistry and its experience in the production of heat-shrinkable products, to the development of a bell and spigot space-age repair system.

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