Descripción: VALVE TESTING PROCEDURE * Summary / Tables* based on main standard of API 598 - Valve Inspection and Testing, and also associated standard of: ASME B16.34 - Valves - Flanged, Threaded, and Wel...
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Pressure Testing Test Requirements by Valve Type & Specification API 598 API 6D ANSI Up to DN100 up to 1500LB Up to DN100 above 1500LB Resilient-seated Lubricat'd. B16.34 or Over DN100 up to 600LB Over DN100 above 600LB Floating Trunnion Plug MSS SPBall or B/fly TEST TYPE Gate Globe Check Gate Globe Check Valves 61 Shell Hydro Requi re red Required Requi re red Requi re red Required Requi re red Required Required Requi re red Required Required Backseat Hydro* Required Required N/A Required Required N/A N/A N/A N/A Required N/A Seat(s) Hydro Optional Required Requi re red Requi re red Required Requi re red Opti on onal Required^ Requi re red Required Note 1 Seat(s) LP (pneum.) Required Optional Optional Optional Optional Optional Required Optional^ Optional Optional Note 1 (*Backseat test required for all valves that have backseat feature except bellows-sealed bellows-sealed valves.) (^For metal-seated metal-seated ball & butterfly valves the LP closure test i s required and the hydro closure test is optional.) 1) MSS SP-61 allows LP closure test on valves below 600LB for DN300 and smaller, and on all pressure classes for DN100 and smaller. ANSI B16.34 allows an LP closure test on valves below 600LB for DN200 and smaller, and all pressure classes for DN100 and smaller.
Minimum Test Duration API 598 Shell Test Check Other Valve Size to DN50 1 min. 15 sec. DN65-DN100 1 min. 1 min. DN125 1 min. 1 min. DN150 1 min. 1 min. DN200 1 min. 2 min. DN250 1 min. 2 min. DN300 1 min. 2 min. DN350-DN450 2 min. 5 min. DN500 up 2 min. 5 min. (*Applies to DN50 only)
Backseat 15 sec. 1 min. 1 min. 1 min. 1 min. 1 min. 1 min. 1 min. 1 min.
API 6D Seat(s) Test Shell Test Check Other 1 min. 15 sec. 2 min* 1 min. 1 min. 2 min. 1 min. 1 min. N/A 1 min. 1 min. 5 min. 1 min. 2 min. 5 min. 1 min. 2 min. 5 min. 1 min. 2 min. 15 min. 2 min. 2 min. 15 min. 2 min. 2 min. 30 min.
Seat(s) 2 min* 2 min. N/A 5 min. 5 min. 5 min. 5 min. 5 min. 5 min.
Maximum Allowable Leakage for Closure/Seat(s) Test API 598
API 6D
Metal-Metal Resilient Liquid Air/Gas Liquid Air/Gas Liquid Air/Gas Valve Size to DN50 0 0 0 0 DN65-DN100 12 12 0 0 DN125 12 12 0 0 No visible leakage at DN150 12 12 0 0 applicable test DN200 20 40 0 0 pressure for specified DN250 20 40 0 0 test duration. DN300 20 40 0 0 DN350-DN450 28 56 0 0 DN500 up 28 56 0 0 (Allowable leakage rates are drops/minute for liquid and bubbles/minute for air/gas.)
MSS SP-61 & ANSI B16.34 Shell Test Seat(s) 15 sec. 1 min. 1 min. 1 min. 1 min. 3 min. 3 min. 3 min. 3 min.
15 sec. 30 sec. 30 sec. 30 sec. 30 sec. 1 min. 1 min. 1 min. 2 min.