Analysis highlights how hdpe properties impact design challenges in pipeline projects, suggesting improved methods for compliance with industry standards.
High-density polyethylene (HDPE) is a flexible thermoplastic that is corrosion resistant and is fused at the joints to create a fully restrained pipe. These advantages make it a desirable material for corrosive soils and in trenchless applications. However, as a thermoplastic material, HDPE presents several design challenges due to the time- and temperature-dependent properties, high coefficient of thermal expansion, and creep characteristics. This paper will demonstrate how HDPE properties were addressed when the project conditions fell outside of industry standards or practices, including determining external loading conditions with combined earth and hydrostatic exceeding 100 ft, pipeline settlement and maximum allowable deflection, and hydrostatic testing reach lengths exceeding industry guidelines.
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Yonteck et al. (2025) studied this question.
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