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<br />PUBLIC WATER UTILITY DISTRIBUTION PIPING <br />2024.020254 Madison Lifestyle District Phase I Utility Design Water Main Replacement 331413 - 10 <br /> <br />1. Pressure test piping system according to AWWA C600 and following: <br />1. Test Pressure: Not less than 150 psi in excess of maximum static pressure <br />2. Conduct hydrostatic test for a minimum of two hours. <br />3. Slowly fill section to be tested with water; expel air from piping at high points. <br />4. Install corporation cocks at high points. <br />5. Close air vents and corporation cocks after air is expelled. <br />6. Raise pressure to specified test pressure. <br />7. Observe joints, fittings, and valves under test. <br />8. Remove and renew cracked pipes, joints, fittings, and valves showing visible <br />leakage, and retest. <br />9. Correct visible deficiencies and continue testing at same test pressure for <br />additional two hours to determine leakage rate. <br />10. Maintain pressure within plus or minus 5 psi (34.4 kPa) of test pressure. <br />11. Leakage is defined as quantity of water supplied to piping necessary to maintain <br />test pressure during period of test. <br />12. Compute maximum allowable leakage using following formula: <br />1) L = SD x sqrt(P)/C. <br />2) L = testing allowance, gph. <br />3) S = length of pipe tested, feet. <br />4) D = nominal diameter of pipe, inches . <br />5) P = average test pressure during hydrostatic test, psig. <br />6) C = 148,000. <br />13. If pipe under test contains sections of various diameters, calculate allowable <br />leakage from sum of computed leakage for each size. <br />14. Leakage: <br />1) If test of pipe indicates leakage greater than allowed, locate source of <br />leakage, make corrections, and retest until leakage is within allowable <br />limits. <br />2) Correct visible leaks regardless of quantity of leakage. <br />2. Compaction Testing: <br /> <br />1. Comply with ASTM D698. <br />2. Frequency of Compaction Tests: every other lift. <br />3. If tests indicate Work does not meet specified requirements, remove Work, <br />replace, and retest. <br />END OF SECTION 33 14 13