ASME A112.4.14:2004 pdf download

ASME A112.4.14:2004 pdf download.Manually Operated,Quarter-Turn Shutoff Valves for Use in
Plumbing Systems.
ASME A112.4.14 establishes requirements for manually operated, quarter-turn valves in nominal sizes (NPS)  2. These valves are intended for indoor installation as potable water shutoff valves between the meter and the supply stop. Valves governed by this Standard are intended for service at temperatures between 34°F (1°C) and 180°F (82°C), with an allowable working pressure rating not less than 125 psi (862 kPa).
1.2 LimItations
This Standard does not apply to hose end valves or endpoint devices as defined in NSF/ANSI 61, Section 9.
1.3 Units of Measurement
The values stated in either US. customary units or the International System of Units (SI) are to be regarded separately as standard. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in non-conformance with the Standard. All pressUres, unless otherwise sped- lied, are gauge pressures. For the purpose of determining conformance with this Standard, the convention for
“rounding off” shall be as defined in ASTM E29.
1.4 References
The following is a list of publications referenced in this Standard.
ASME B1.20.1, Pipe Threads (Excluding Dryseal)
ASME B16.18, Cast Copper Alloy Solder Joint Pressure I:ittings
ASME B16.22, Wrnught Copper and Copper Alloy Solder Joint Pressure Fittings
ASME B16.26, Cast Copper Alloy Fittings for flared Copper Tubes
Publisher: The American Society of Mechanical Engineers (ASME), Three Park Avenue, New York, NV 10016-5990; Order Department: 22 Law Drive, Box 2300, Fairfield, NJ 07007-2300
5.1 Hydrostatic Test
(a) Metallic Valves. The test valve shall be given a hydrostatic test at a pressure of two times its marked pressure rating. The test fluid shall be water. The test fluid temperature shall be 14OF (6OtC). The duration of the test shall be 1 mm.
The ball or disc shall be in such a position during the shell test as to ensure full pressurization of the valve.
(b) Polynk’ric Valves. Polymeric valves shall be hydrostatically tested to ASTM F1970, para. 8.2.
5.1.1 Performance Criteria. The valve exterior shall show no visible leakage. Leakage through the stem packing shall not be cause for resection as long as a packing gland adjustment stops the leakage.
5.2 Seat Test
5.2.1 Procedure. Following the shell test, the test valve shall be given a seat test. The test shall be a hydrostatic test at not less than 125 psi at 14OF (60°C) or the maximum rated pressure and temperature of the valve. The test pressure shall be applied successively on each side of the dosed valve for duration of not less than 1 mm.
Valves marked as one-way valves require a seat test only in the direction of the flow.
5.2.2 Performance Criteria There shall be no visible evidence of leakage through the disc or ball nor leakage past the seat.
5.3 Cycle Test
5.3.1 Procedure. A production sample valve shall withstand 1,000 cycles of operation from the fully opened to the fully closed position at its continuous rated temperature not less than 140°F (60°C). The test is to be conducted with a hydrostatic pressure-differential applied across the closed disc/ball equal to the rated working pressure. Restrict an opening downstream of the valve to a flow of approximately 2.5 gpm (9.5 1/mm) during the open portion of the test.