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leakage test shall be made after all jointing operations are completed and <br /> after backfilling is completed. All concrete reaction blocks, or other <br /> bracing and restraining facilities, shall be in place at least 14 days before <br /> the initial filling of the line. <br /> 2. The pressure and leakage tests may be applied to an individual section of <br /> line isolated between the existing line valves, or may be applied to shorter <br /> sections of line at the Contractor's option. If shorter sections are tested, <br /> test plugs or bulkheads as required at the ends of the test section shall be <br /> furnished and installed by the Contractor at his expense, together with all <br /> anchors, braces, and other devices required to withstand the hydrostatic <br /> pressure on such plug or plugs, without imposing any hydraulic thrust on <br /> the pipe line or any part thereof. The Contractor shall be solely <br /> responsible for any and all damage to the pipe line, and/or to any other <br /> facility, which may result from the failure of test plugs furnished by him or <br /> supports therefore, in any case. <br /> 3. Hydrostatic Tests: <br /> a. The section of line to be tested shall be slowly filled with water and <br /> all air expelled from the pipe. Care shall be taken that all air <br /> valves are installed and open in the section being filled, and that <br /> the rate of filling does not exceed the venting capacity of the air <br /> valves. <br /> b. Hydrostatic test pressure shall be as follows: <br /> Pressure <br /> System Test Rating <br /> Fire line 200psipsi <br /> Potable Water 150 psi <br /> Miscellaneous Pressure Pipe 1.5 times static <br /> operation head <br /> c. After the pipe has been laid, all newly laid pipe of any valved <br /> section thereof shall be subjected to a hydrostatic pressure of at <br /> least 1.5 times the working pressure at the point of testing. <br /> 1) Test pressure shall: <br /> Not be less than 1.25 times the working pressure at <br /> the highest point along the test section. <br /> ii. Not exceed pipe or thrust-restraint design <br /> pressures. <br /> iii. Be of at least 2-hour duration. <br /> iv. Not vary by more than ±5 psi (0.35 Bar) for the <br /> duration of the test. <br /> v. Not exceed twice the rated pressure of the valves <br /> or hydrants when the pressure boundary of the test <br /> section includes closed gate valves or hydrants. <br /> NOTE: Valves shall not be operated in either <br /> direction at differential pressures exceeding the <br /> rated pressures. <br /> vi. Not exceed the rated pressure of the valves when <br /> the pressure boundary of the test section includes <br /> closed valves. <br /> 08/12 01670-3 11-4179 <br />