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MODIFIED PLAIN STRAIN GROOVED TENSILE TEST TO EVALUATE LARGE DIAMETER PE PIPES

 

Thomas R. Kratochvilla, Patrick Grünbeck, Christoph Bruckner, Raimund Eremiasch, Harald Wilhelm, Mario Vukelja

# 2021 Amsterdam

In the last decades pipe dimensions of extruded PE pipes have reached new orders of size. Today, PE pipes with outer diameters of up to DN/OD 3500 mm are produced and used for pressure pipe applications like seawater intake/discharge, outfall, sewage and industrial process piping systems.

To test the long-term performance of PE pipes the internal pressure test has been successfully used in the last decades. To evaluate the long-term performance of large diameter PE pipes an alternative test method which correlates with the internal pressure test was developed in the last years. In 2012 the approach to evaluate a modified PSGT test according ISO 23228 was started. Data for different pipe diameters were generated using the modified PSGT test at 20 °C and 80 °C and compared with internal pressure test results. A correlation was established and first reference points for evaluating large diameter pipes generated.

Related keywords : plain strain grooved tensile test (PSGT test), internal pressure test, hydrostatic strength, finite element analysis (FEA), batch release testing (BRT), process verification testing (PVT).
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