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Title: Compatibility Of Interior Surface Finish And Squeezability Of Pe Pipe
Author: Howard V. L. Patrick
Source: American Gas Association 2001
Year Published: 2001
Abstract: Because of safety concerns associated with gas leakage axially along the pipe interior after squeeze-off, numerous tests using 2 in. ips SDR- 11 PE pipe are performed. This investigation is initiated in an attempt to correlate pipe interior texture with leakage airflow rate. The leakage airflow rate is measured after the pipe is squeezed until both gap-stops are in contact, using double round bar jaws mounted in a hydraulic actuated squeeze tool. A surface texture measuring system is used to measure the surface interior of the same pipe samples that are used in the squeeze-off tests. Leakage airflow rate is correlated with interior pipe surface texture in an attempt to determine the squeezability of 2 inches ips SDR-11 PE pipe. This investigation determined that axial leakage airflow rate along the pipe interior and through the squeezed region, increases with increasing surface roughness and waviness for high density resin pipe. It is also determined that neither roughness nor waviness has any appreciable effect on leakage airflow rate for medium density resin pipe.

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