02-11-1985 Council Packet - Laserfiche WebLink

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I I 24,000.3.J. TFSTING FORCE. MAIN PIPE LINES: 24,000.3.J.1. Pressure_ During! Tests: After the pipe has been laid and partially backfilled as sn, ified, all newly laid pipe shall be subjected to hydrostatic or air pressure of 100 lbs. per square inch. The test must be c(,ducted under the observation of the Fngineer and with his approval. 24,000.3.J.2.. Duration of Pressure Tests: The duration of each pressure test shall be at least 10 minutes. 24,000.3.J.3. Procedure: All pipe or sections thoro,f ;hall be slowly filled with water from a safe source if a hydrostatic test is used and the specified test pressure, measured at the lowest point_ of elevation, shall he applied by means of a pump connected to the pipe in a satisfactory manner. The pump, pipe connection, gauges and all necessary apparatus shall be furnished by the contractor. Gauges and measuring devices must meet with t.! approv 1 of the Fngineer and the necessary pipe taps made as required. 24,000.3.J.4. Welling Air Before Test: Before applying hydros-,atic test pressure, all air shall be expelled from the pipe. To accomplish this, Laps shall be made, if necessary, at points at highest elevation and afterward tightly plugged. 24,000.3.J.5. Examination Under Pressure: All e:�posed pipes, fittings, valves and _joints will be carefully examined during the open trench test. Any crack or defective pipes, fittings, valves or hydrants discovered in consequence of the pressure test shall be repeated until satisfactory to the Fngineer. 14 24,000.3.J.6. Permissible Leakage., A drop in pressure over the 30 minute (� test period exceeding 3 pounds shall be cause for .ejection of the project. All leaks shall be corrected and the test repeated until the pressure drop is •hin the 3 pound limit. 1J 811 14,000.3.J.7. Conductivity: Conductivity shall be provided throughout the ')rce main system by use of copper straps or approved conductive gaskets with ;r (:,p,er inserts. All fittings shall be mechanical joint with copper straps. is Lea•A tipped gaskets will not be approved for conductivity. Copper jumper straps between section, of pipe shall be not less than 1/16" r 3/4" strap bolted to shop welded pipe straps of the same size. Bolts shall be 5/16" diameter bronze. For all locations where shop welded straps are not available, field welds shad be made using the radweld method with size 32 cartridge. Each field weld shall be properly made after filing the surface of the pipe to a clean bare metal over the entire area of the weld. Straps bolted to mechanical joint fittings shall be not less than 1/16" x 115". All straps shall ho securely fastened and hackfill placed so as to not damage they conductivity. M I Is 24,000-3 0-5841c copyright 1985 Aonestroo, Rosene, Anderlik. 6 Associates, Inc.