Laserfiche WebLink
Section 15072 <br /> HIGH DENSITY POLYETHYLENE PIPE <br /> (1) A diameter, or minor diameter as applicable, equal to the average inside diameter <br /> of the pipe minus the dimension equivalent of the maximum installed deflection <br /> specified in Paragraph 2.03A, Characteristics. A tolerance of plus 0.5 percent in <br /> the diameter of the test device will be permitted. <br /> (2) A homogeneous material throughout, with a density greater than 1.0 as related to <br /> water at 39.2°F, and a surface Brinell hardness of not less than 150. <br /> (3) Center bored and through bolted with a 1f4-inch minimum diameter steel shaft <br /> having a yield strength of not less than 70,000 pounds per square inch, with eyes <br /> or loops at each end for attaching pulling cables. <br /> (4) Each eye or loop shall be suitably backed with a flange or heavy washer such that <br /> a pull exerted on opposite end of shaft will produce compression throughout <br /> remote end. <br /> b. Pull-Through Device Procedure: Pass the pull-through device through each run of <br /> pipe, either by pulling it through or flushing it through with water. If the device fails <br /> to pass freely through a pipe run, replace pipe which has the excessive deflection and <br /> completely retest in same manner and under same conditions as specified. <br /> 3. Deflection Device: The Contractor shall determine whether the allowable deflection has <br /> been exceeded by use of a pull-through device. <br /> a. Deflection Measuring Device: This device shall be sensitive to 1.0 percent of the <br /> diameter of the pipe being tested and accurate to 1.0 percent of the indicated <br /> dimension. The deflection measuring device shall be approved by the Construction <br /> Manager prior to use. <br /> b. Deflection Measuring Device Procedure: Measure deflection through each run of <br /> installed pipe. If deflection readings in excess of the maximum allowable specified <br /> in Paragraph 2.03A, Characteristics are obtained, retest pipe by a run from the <br /> opposite direction. If retest continues to show a deflection in excess of the allowable, <br /> remove pipe which has excessive deflection, replace with new pipe, and completely <br /> retest in the same manner and under the same conditions. <br /> **END OF SECTION** <br /> Walnut Grove Sewer Project(Conformed) 15072-7 SA0160401 <br /> March 2008 n:\sa016040IVspecs\wconform\oiv 15\15072.doc <br />