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Title: Rupture Prevention Design Procedure For Pe Gas Pipe
Author: m. F. Kanninen, S. C. Grigory
Source: American Gas Association 1994
Year Published: 1994
Abstract: A rupture-prevention design procedure for gas distribution pipe that can be used by the gas industry is in the final stages of development at Southwest Research Institute (SwRI). The work is being funded by the Gas Research Institute (GRI). Given the pipe size, polyethylene (PE) resin and minimum operating temperature, the maximum safe operating pressure may be determined for which rapid crack propagation (RCP) cannot occur. A computer program call PFRAC has been developed for this purpose that uses Charpy energy as the measurement of fracture toughness of the PE. The current effort involves the replacement of Charpy energy with a dynamic toughness measurement obtained from the Small Scale Steady State (S4) test that is required in ISO 4437. The discussion in this presentation is restricted to the RCP requirements of ISO 4437, the specifics of the S4 test and the relationship of the S4 test to the rupture-prevention design procedure.

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