ASME PTC 39:2005 pdf free download

ASME PTC 39:2005 pdf free download.Steam Traps.
(h) Record air pressure P3 and temperature T3 on Form 8. Open the inlet valve V3, the outlet valve V4, and start the test timing device simultaneously. Adjust the pressure regulating valve (PRy), if required, to maintain P2 at the desired steam test pressure.
(I) Stop the test when 1’2 is 10°F (6 K) less than the dosing point as defined by the capacity test procedure in para. 4-8, and record the test time interval, t, on Form 8.
(j) Repeat (b) through (1) as necessary to produce three sets of observations, which result in three calculated flow rates, none of which vary from the average by more than 10%.
4-9.6 In-Process Test
(a) Measure and record on Form 8 the volume (VAT) contained in the air accumulator and piping bounded by valves V3, V4, V5, and V6.
(b) Start with all valves in the closed position and activate electronic temperature indicating/recording devices, if used.
(c) Open valves V4, V7, and water valve V6 to cool the air accumulator to ambient temperature.
(d) Close the water valve, V6, and allow the air accumulator to drain. The air valve, V5, may be opened to facilitate draining and drying the air tank.
(e) Close valve V5 if used, and valves V4 and V7, and attach the test device.
(f) Open the vent valve. Vi, and V3, and slowly adjust the steam pressure regulator, PRy, such that P1 is set at the desired test pressure. Verify temperature T1 is at saturation temperature corresponding to the test pressure, P1, and record P1 and T1 on Form 8.
NOTE: The vent v.ilve can be throttled to a minimum flow to
maintain stable steam pressure and temperature conditions.
(g) Close V3, open valve V5, and adjust the air accumulator pressure P3 to approximately 80% of the steam test pressure P1 using the air regulator (AR). Close valve V5.
(h) Open V2 to allow the steam piping and the test device to warm up, and verify the test device is operating properly and discharging condensate.
(i) Record the air pressure, P3. anti temperature, T.on Form 8. Simultaneously close valve V2, open valves V3 and V4, and start the test timing devices. Adjust the pressure regulating valve, PRV, as required to maintain P2 at the desired steam test pressure.
(j) Stop the test when T2 is 10°F (6 K) less than the air closing point as defIned by the capacity test procedure in para. 4-8, and record the test time interval, .l, on Form 8.
(k) Repeat (b) through (j) as necessary to produce three sets of observations, which result in three calculated flow rates, none of which vary from the average by more than 10%.
4-9.7 Mr and Noncondensible Gas Handling Capacity
Test results can be reported in actual cubic feet per minute (ACFM) or standard cubic feet per minute.