Forecasting the Long-Time Service Performance of PE Gas Distribution Pipes [PE]
Kuhlmann, Kanninen, Tweedy
# 1992 Eindhoven
Accelerated slow crack growth testing procedures that are coupled with
newly developed bi-directional time-temperature shifting functions can
provide reliable fracture mechanics based forecasts of long-term service
performance of polyethylene gas distribution pipes. This methodology
is first reviewed, then used in conjunction with the British Gas notch
pipe test. Specific attention has been given to the role of extrusioninduced residual stresses on the service performance of pipe systems.
Suggestions are offered for an integrated analysis/testing approach that
will enhance the practical usefulness of test data.
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Author(s) : Mel Kanninen, Kyle Bethel and Aron Ekelund
It is well known that gas permeation in thermoplastic pipe is proportional to pressure. Accordingly,
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Author(s) : Grigory, Kim, Kanninen, O'Donoghue, Mamo
The perceived need to ensure that
polyethylene gas distribution pipes are safe from
the possibility of long running catastrophic
cracks has prompted a significant level of research recently. This paper brings to a completion an ongoing effort by the authors and their
colleagues over the last few years. The...
Most current procedures for the design, installation and qualification of
electrofused jointsin polyethylene gas piping systems are empirical in nature.
To improve this situation, the Gas Research Institute initiated an integrated
experimental and analysis research program at the Southwest Research
This paper outlines a theoretical approach developed to quantify
the conditions for a long-running crack in PE gas distribution pipes.
Comparisons with a full-scale experiment on a 250 mm diameter
SDR 17.6 MDPE pipe are made to demonstrate the validity of the
model. The present status of a user-oriented procedure to...