ASME A112.4.14 pdf download

ASME A112.4.14 pdf download.Manually operated valves for use inplumbing systems.
1.2
Valves covered by this Standard are Intended for
a) installation as water shutoff valves between the meter and the supply stop; and
b) service at temperatures between 5 C (40 F) and 71 C (160 F), with an allowable working pressure rating not less than 862 kPa (125 psi).
This Standard does not apply to hose end valves or endpoint devices as defined in Section 9 of NSF/ ANSI 61.
In this Standard, “shall is used to express a requirement, Le, a provlson that the user is obliged to satisfy in order to comply with the standard; sho4Jld Is used to express a recommendation or that which is advised but not required; and “may” is used to express an option or that which is permissible within the limits of the Standard.
Notes accompanying clauses do not Include requirements or alternative requirements; the purpose of a note accompanying a clause Is to separate from the text explanatory or Informative material.
Notes to tables and figures are considered part of the table or figure and may be written as requirements,
Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.
SI units are the units of record In Canada. In this Standard, the yard/pound units are shown In parentheses.
The values stated in each measurement system are equivalent in application; however, each system is to be used independently. Combining values Iron, the two measurement systems can result in non-conformance with this Standard.
All references to gallons are to U.S. gallons.
For information on the conversion criteria used in this Standard, see Annex A.
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 01784.
4.3.4.3
CPVC compounds used for pressure containing parts shall comply with cell classification 23447, as specified In ASTM D1784.
4.3.5 Alternate materials
Alternate rriatenals shall comply with national or international standards for which mechanical and chemical data are available.
4.4 Toxicity and lead content
4.4.1
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. Metal alloys 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 shall not contain a weighted average lead content in excess of 0.25% when evaluated in accordance with the test method in NSF/ANSI 372.
4.5 Stem design
The valve shall be designed so that the stem-seal alone does not retain the stem to prevent the removal of 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 of
23 t 2 C (73 i 4 F) for 1 mm. The pressure shall be applied to the inlet with the outlet blocked and the valve 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 ASTM D1599 at a temperature of 23 C ± 2 C (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 shall be tested in accordance with ASTM D1599 at a temperature of 82 C ± 2.0 C (180.0 F ±4 F) or the manufacturer’s maximum rated temperature, whichever is greater. The burst pressure for the second valve 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. Leakage through the stem packing shall not be cause for rejection as long as a packing gland adjustment stops the 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 mm. The test fluid shall be 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 A5TM F 1970.