By American Water Works Association
This handbook presents clients of PE pipe and fittings in potable water structures with either technical and common details on layout, specification, procurement, and install.
Coverage contains engineering houses of polyethylene, production, hydraulics, exterior rather a lot, becoming a member of, fittings, transportation, dealing with, and garage, install, and upkeep
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Additional resources for PE Pipe Design and Installation
The extrapolation method predominantly used in North America is defined in ASTM D283717. Using this protocol, stress-rupture data at a specific temperature is gathered over a 10,000 hour period. If the data meets certain distribution criteria, the data is extrapolated to 100,000 hours. The stress intercept that is extrapolated at 100,000 hours is referred to as the long-term hydrostatic strength (LTHS) of the material being evaluated. The LTHS will fall into one of a series of preferred stress ranges defined in ASTM D2837.
As it relates to tensile testing of PE pipe grades, strain is generally approximated by assuming a straight-line relationship to stress at lower stress levels (up to 30 percent of the tensile yield point), and it is reversible. That is, the material deforms but will over time recover its original shape when the stress is removed. The strain in this region is referred to as the elastic strain because it is reversible. The Modulus of Elasticity (or Young’s Modulus) is the ratio between the stress and strain in this reversible region.
The resulting damage was attributed to the need for the rodent to maintain their teeth in good condition and the damage associated with gnawing on the profile was felt to be no greater with PE than with any other piping materials installed in these areas. Additional information is available from PPI Technical Report TR-1116. LONG-TERM PROPERTIES Long-Term Hydrostatic Strength The pressure capability of PE pipe is based on an extrapolation of stress-rupture data over time. The extrapolation method predominantly used in North America is defined in ASTM D283717.