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Stiffness Requirements for HDPE, Profile Wall Pipe

by Larry J. Petroff, Spiral Engineered Systems, Norcross, GA, USA,



Document Type: Proceeding Paper

Part of: Advances in Underground Pipeline Engineering

Abstract:

For the past two years the Gulf Oil Corporation has sponsored a research study on profile wall High Density Polyethylene (HDPE) pipe at Texas A & M University. A pipe design computer code, CANDE, was modified to accommodate the profile wall pipe. This model was used to determine among other things the effects of viscoelasticity, pipe stiffness, and trench width on pipe deformation and pipe wall strain. A full factorial analysis was made of the CANDE runs and the results were used to develop a regression equation which has been published. Specimens taken from the pipe wall were tested to determine the design strain for HDPE in compression. By utilizing test results from this study in conjunction with other long term studies, the allowable long term compressive strain for HDPE profile pipe was determined to be about 4. 2%.

Subject Headings: Synthetic materials | Polyethylene | Plastic pipes | Walls | Pipes | Strain | Stiffening | Texas | United States

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