ASME A112.4.14:2017 pdf download

ASME A112.4.14:2017 pdf download Manually operated valves for use in plumbing systems
4.3.4.2
pvC compounds used for pressure containing parts shall comply with cell classification 12454,13354,11443, or 14333, as specified in ASTM D1784.
4.3.4.3
cPVC compounds used for pressure containing parts shall comply with cell classification 23447, asspecified in ASTM D1784.
4.3.5 Alternate materials
Alternate materials shall comply with national or international standards for which mechanical andchemical data are available.
4.4 Toxicity and lead content4.4.1
Valves intended for potable use shall comply with the applicable requirements of NSF/ANSI 61.
4.4.2
Solders and fluxes in contact with potable water shall not exceed, by mass,0.2% lead content.Metalalloys in contact with potable water shall not exceed 8% lead content.
4.4.3
Valves intended to convey or dispense water for human consumption through drinking or cooking shallnot contain a weighted average lead content in excess of 0.25% when evaluated in accordance with thetest method in NSF/ANSI372.
4.5 Stem design
The valve shall be designed so that the stem-seal alone does not retain the stem to prevent the removalof the stem while the valve is under pressure.
5 Performance requirements and test procedures
5.1 Burst pressure
5.1.1 Performance requirements
when tested in accordance with Clause 5.1.2 or 5.1.3, the valve shall show no signs of leakage,permanent distortion, or failure of the pressure envelope.
5.1.2 Test procedure
The test specimen shall withstand a hydrostatic bust pressure of 3450 kPa (500 psi) at a temperature of23±2°C(73±4 *F) for 1 min. The pressure shall be applied to the inlet with the outlet blocked and thevalve open.
5.1.3 Alternate test procedure
Valves rated in excess of 71″C(160 °F) and 862 kPa (125 psi) shall be tested in accordance with ASTMD1599 at a temperature of 23 °C±2°℃(73 “F±4 °F).The burst pressure shall not be less than three times the manufacturer’s maximum rated pressure at that temperature.A second test specimen shallbe tested in accordance with ASTM D1599 at a temperature of 82 °C±2.0 “C(180.0 °F±4 “F) or themanufacturer’s maximum rated temperature, whichever is greater. The burst pressure for the secondvalve shall not be less than two times the manufacturer’s rated pressure at the test temperature.5.2 Hydrostatic test
5.2.1 Performance requirements
When tested in accordance with Clause 5.2.2, the valve exterior shall show no visible leakage.Leakagethrough the stem packing shall not be cause for rejection as long as a packing gland adjustment stopsthe leakage.
5.2.2 Test procedure
The hydrostatic test shall be conducted as follows:
a)Metallic valves shall be tested at two times its marked pressure rating for 1 min.The test fluid shallbe water and its temperature shall be 60 ± 2.0 “C(140 ±4 °F).The valve shall be in the open
position during the test to ensure full pressurization of the valve.
b)Polymeric valves shall be tested in accordance with Section 8.2 of ASTM F1970.
5.3 Static and dynamic seals
5.3.1 Performance requirements
When tested in accordance with Clause 5.3.2, the valve seals shall not leak or otherwise fail.
5.3.2 Test procedure
The valve seals shall be tested in accordance with the applicable requirements in Clauses 5.3.1.2 to5.3.1.4 of ASMEA112.18.1/CSA B125.1.
5.4 Cycle test
5.4.1 Performance requirements
When tested in accordance with Clause 5.4.2, the valves shall continue to function as they did beforethe life cycle and shall not leak.
5.4.2 Test procedure
A test specimen shall withstand 2,000 cycles of operation from the fully-opened to the fully- closedposition at its maximum rated temperature not less than 65 ±5 “℃(150± 10 “F). Water at a flowingpressure of 345 ± 35 kPa (50 ± 5 psi) and a supply pressure of 550 kPa (80 psi) maximum (valve closed)shall be supplied to the valve throughout the test.An opening downstream of the valve shall be
restricted to a flow of approximately 9.5 L/min (2.5 gpm) during the open portion of the test.
5.5 Flow test
5.5.1 Performance requirements
The valves shall meet the minimum flow rates specified in Table 1 or shall have a flow factor (K.) [flowcoefficient (C,)] factor equal to or greater than the values specified in Table 1.