Awwa c605 download

Our policy towards the use of cookies Techstreet uses cookies to improve your online experience. They were placed on your computer when you launched this website. You can change your cookie settings through your browser. Request Free Trial. Language: English. Use of a test pressure greater than the rated valve pressure can result in trapped test pressure between the gates of a double-disc gate valve.

For tests at these pressures, the test setup should include a provision, independent of the valve, to reduce the line pressure to the rated valve pressure on completion of the test.

The valve can then be opened enough to equalize the trapped pressure with the line pressure, or fully opened if desired. After the pipe has been laid, all newly laid pipe or any valved section thereof shall be subjected to a hydrostatic pressure of at least 1.

Each valved section of pipe shall be slowly filled with water, and the specified test pressure based on the elevation of the lowest point of the line or section under test and corrected to the elevation of the test gauge shall be applied by means of a pump connected to the pipe. Valves shall not be operated in either the opening or closing direction at differential pressures above the rated pressure.

It is good practice to allow the system to stabilize at the test pressure before conducting the leakage test. Before applying the specified test pressure, air shall be expelled completely from the section of piping under test. If permanent air vents are not located at all high points, corporation cocks shall be installed at such points so that the air can be expelled as the line is filled with water. At the conclusion of the pressure test, the corporation cocks shall be removed and plugged or left in place as required by the specifications.

All exposed pipe, fittings, valves, hydrants, and joints shall be examined carefully during the test. Any damage or defective pipe, fittings, valves, hydrants, or joints that are discovered following the pressure test shall be repaired or replaced with sound material, and the test shall be repeated until satisfactory results are obtained.

Leakage shall be defined as the quantity of water that must be supplied into the newly laid pipe or any valved section thereof to maintain pressure within 5 psi Leakage shall not be measured by a drop in pressure in a test section over a period of time. These formulas are based on an allowable leakage of Acceptance shall be determined on the basis of allowable leakage. If any test of laid pipe discloses leakage greater than that specified in Sec. Open navigation menu.

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