ASME B16.44:2002 pdf free download

ASME B16.44:2002 pdf free download
ASME B16.44:2002 pdf free download.MANUALLY OPERATED METALLIC GAS VALVES FOR USE IN ABOVEGROUND PIPING SYSTEMS UP TO 5 PSI
5.8.1 Minimum Operating Temperature Test. A new unused valve shall be tested in accordance with para.5.2. Following para. 5.2 testing, the valve, in the open position shall be placed in a chamber maintained at the manufacturer’s specified minimum operating tempera- ture; this temperature shall be maintained for at least one hour. The valve shall then be closed. During closing the torque shall not exceed twice that shown in Table 7. With the valve in the closed position and maintained at the Manufacturer’s designated minimum operating temperature, the inletshall be subjected to a testpressure of 1.5 times the pressure rating until equilibrium condi- tions are attained. The leakage rate shall be measured and shall not exceed 50 cc/hr ofair corrected to standard conditions of 30.0 in., mercury (1.02 bar) pressure and 60°F (15.5°C) temperature. The valve shall then be opened with the outlet sealed. The leakage rate shall again be measured and shall not exceed 50 cc/hr of air corrected to 30.0 in. mercury (1.02 bar) pressure and 60°F (15.5°C) temperature.
5.8.2 Maximum Operating Temperature Test. A new unused valve shall be tested in accordance with para. 5.2. Following para. 5.3 testing, the valve, in the open position, shall be placed in a chamber maintained at the manufacturer’s designated maximum operating tem- perature provided it is above 125°F (52°C). After the valve body has attained the specified maximum operating temperature, this temperature shall be main- tained for at least one hour. The valve shall then be closed. During closing the torque shall not exceed twice that shown in Table 7.
With the valve maintained at the manufacturer’s des- ignated maximum operating temperature in the closed position, the inlet shall be subjected to a test pressure of 1.5 times the pressure rating until equilibrium condi- tions are attained. The leakage rate shall be measured and shall not exceed 50 cc/hr ofair corrected to standard conditions of 30.0 in. mercury (1.02 bar) pressure and 60°F (15.5°C) temperature.