ASME A112.19.5-2011 pdf download

ASME A112.19.5-2011 pdf download.Flush valves and spuds for water
closets, urinals, and tanks.
5.4.1 Performance requirement
The joint between the fixture and the flush valve (i.e., the flush valve mounting seal) shall not leak.
Leakage through the flush valve seal opening shall not be considered a failure.
5.4.2 Test method
The fixture and flush valve joint leak test shall be conducted as follows:
(a) Assemble the flush valve into a hole in the bottom of a container that is at least 500 mm (20 in) deep from the bottom to the lowest spill point. The hole in the bottom of the container shall be 1 to 5 mm (0.04 to 0.20 in) larger than the outside diameter of the flush valve thread or in accordance with the manufacturer’s instructions in the case of non-threaded connections.
(b) Fill the container with water at 21 ±5 °C (70 ± 10°F) to a height of 500 mm (20 in) measured from the container bottom.
(c) Wait 10mm.
(d) Inspect for leaks between the flush valve and the container.
5.5 Leak rate and chemical resistance tests
5.5.1 General
The flush valve seal shall be tested with a flush valve. The tests shall be conducted in the following order:
(a) leak rate test (see Clause 5.5.3.2); and
(b) chemical resistance test (see Clause 5.5.3.3).
5.5.2 Performance requirement
Leakage through the flush valve seal during the initial leak rate test period and after the chemical resistance test shall not exceed 0.25 mL/h.
5.5.3 Test methods
5.5.3.1 Apparatus
The test apparatus for the leak rate and chemical resistance tests shall consist of an NPS-8 clear PVC pipe attached to a piece of 6.4 mm (0.25 in) PVC flat stock. The joint between the pipe and the flat stock shall be completely sealed. The flat stock shall have a hole bored through it that is 1 to 5 mm (0.04 to 0.20 in) larger than the outside diameter of the flush valve thread or attachment mechanism. The flush valve shall be assembled into the hole in the flat stock. The clear PVC pipe shall be marked with a fill line 178 ±
1.5 mm (7 ± 0.06 in) above the lowest point of the flush valve seat. Leakage from the flush valve seal shall be collected and measured.
Note: An alternative test apparatus may be used if the conditions of this Clause are met.
5.5.3.2 Leak rate test procedure
The leak rate test shall be conducted as follows:
(a) Fill the test apparatus with water at 21 ± 5 °C (70 ± 10°F) to the specified fill line.
(b) Lift the flush valve seal and flush the test apparatus.
Note: This procedure will allow the flush valve seal to be wetted and seal properly.
(c) Repeat Items (a) and (b) two more times, for a total of three fill-flush cycles.
(d) Fill the test apparatus to the fill line. Allow the flush valve seal to seat properly by leaving the test setup undisturbed for24±1 h.
(e) At the end of the 24 ± 1 h period specified in Item (d), drain any water from the beaker, refill the apparatus with water to the fill line, and start the test. Conduct the test for 1 h ± 2 mm.
(f) At the conclusion of the test, remove the test apparatus from the graduated beaker.
(g) Inspect the beaker for any water that might have leaked past the flush valve seal.
(h) Measure the water collected in the beaker and calculate the leak rate.
5.5.3.3 chemical resistance test procedure
The chemical resistance test shall be conducted on two new test specimens for two different bowl cleaner
solutions, as follows:
(a) Prepare solutions of two different chlorine-based bowl cleaners at 2000 ± 100 ppm of total chlorine in water. Analyze each solution upon preparation and at each solution change (see Item (e)) and record the concentration each time. Maintain the concentration between 2000 ± 200 ppm. If the analyses indicate that the concentrations of the solutions have changed outside of this range, discard the solutions and prepare new ones.
Note: Clorox Bleach and 2000 Flushes Bleach are acceptable. if either product is discontinued, the tests may be conducted using an available bowl cleaner. The discontinued product should be reported to the ASME and CSA technical committees.
(b) Attach the specimen to the test apparatus. Do not use more than one specimen per test apparatus.
(c) Fill the test apparatus to the fill line with the solution.
(d) Place the test apparatus with the solution and the specimen in a convection oven or other device capable of maintaining a temperature of 40 ± 3 °C (104 ± 5°F) for 28 days.
(e) Replace the solution in the test apparatus once a day with fresh solution.
(f) Within 1 h of the end of the 28-day test period, subject the specimen to the leak rate test specified in Clause 5.5.3.2.