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AWWA C906-15 pdf download.Polyethylene (PE) Pressure Pipe and Fittings, 4 In. Through 65 In. (100 mm Through 1,650 mm), for Waterworks
The selection of materials is critical for water service and distribution piping in locations where there is a likelihood the pipe will be exposed to significant con- centrations of pollutants composed of low-molecular-weight petroleum products or organic solvents or their vapors. Research has documented that pipe materials such as ; polyethylene, polybutylene, polyvinyl chloride, and asbestos cement, and elastomers used in jointing gaskets and packing glands, are subject to permeation by lower- molecular-weight organic solvents or petroleum products. If a water or wastewater pipe must pass through a contaminated area or an area subject to con- tamination, consult with pipe manufacturers regarding permeation of pipe wall, jointing materials, and so on, before selecting materials for use in that area.
For the reader's convenience, a bibliography of additional resources about per- meation of elastomeric joint gaskets and polyolefin pipe is provided in appendix B.
4.3.6 Elevated-temperature sustained pressure test for pipe. Elevated- temperature sustained pressure tests for each compound defined in Table 1 used in production at a facility shall be in accordance with Sec. 5.3 and Table 2 and ASTM D1598, using water as the pressurizing medium. The test sample shall consist of three specimens of a generally representative pipe size taken from the same extru- sion run. One Table 2“condition”for each compound shall be selected and the three specimens shall be tested.
4.3.6.1 Brittle failure* of any of the three test specimens prior to the speci- fied Table 2“minimum average time to failure”" constitutes failure of the test. Pass- ing results are (1) nonfailure for all three specimens at a time equal to or greater than the“minimum average time to failure” or (2) not more than one ductile failure, which occurs prior to the“minimum average time to failure”and provided the average time on test for all three specimens is greater than the specifed“mini- mum average time to failure” for the selected Table 2 condition. When testing under Conditions 1 through 5, should two or more specimens fail by the ductile mode prior to the“minimum average time to failure," this test is inconclusive and this result mandates a retest at a Table 2“condition”of lower test stress but longer “minimum average time to failure" (see Sec. 4.3.6.2). Only one retest is permis- sible. For Table 2 Condition 6, no retest is permissible.AWWA C906-15 pdf download。