MVME187-031B處理器模塊
這些檢查應(yīng)由閥門制造商在買方檢驗員的見證下進行。5壓力試驗5.1試驗地點壓力試驗應(yīng)由閥門制造商在閥門制造商的工廠或制造商和買方共同同意的設(shè)施進行。5.2試驗設(shè)備閥門制造商用于進行所需壓力試驗的設(shè)備不得施加影響閥座泄漏的外力。如果使用端部夾具，閥門制造商應(yīng)能夠證明試驗夾具不會影響被測閥門的閥座密封能力。對于設(shè)計用于配合法蘭之間的閥門，如對夾止回閥和對夾蝶閥，允許端部夾緊。5.3要求的試驗5.3.1應(yīng)根據(jù)符合本標準的書面程序?qū)γ總€閥門進行表1或表2中列出的壓力試驗。5.3.2除非采購訂單中另有規(guī)定，否則制造商可選擇對具有后座功能的閥門進行高壓或低壓后座試驗。5.3.3公稱直徑為100（NPS 4）及以下的閥門，其壓力額定值達到并包括ASME 1500級，以及公稱直徑大于100（NPS 3）的閥門，壓力額定值超過并包括ASME 600級，應(yīng)根據(jù)表1進行測試。買方可選擇要求表1中的“可選”壓力測試，額定壓力大于ASME 1500級的閥門和額定壓力大于DN 100（NPS 4）且大于ASME 600級的閥門應(yīng)根據(jù)表2進行測試。買方可選擇要求表2中的“可選”壓力測試。5.3.5縮徑閥的泄漏率應(yīng)基于閥門的DN（NPS）。版權(quán)所有美國石油學會由IHS根據(jù)API許可證提供，許可證持有人=阿爾伯塔大學/5966844001，用戶=sam，albert未經(jīng)IHS許可不得復制或聯(lián)網(wǎng)，不得轉(zhuǎn)售，2013年6月28日16:13:35 MDT閥門檢驗和測試5表1-壓力測試閥門： 用的a除波紋管密封閥外，所有具有后座功能的閥門都需要進行后座試驗。b對于潤滑旋塞閥，高壓關(guān)閉試驗是強制性的，低壓關(guān)閉試驗是可選的。c當買方指定“可選”試驗時，除要求的試驗外，還應(yīng)進行試驗。d彈性閥座閥的高壓關(guān)閉試驗可能會降低低壓環(huán)境下的后續(xù)密封性能。e對于電動和手動齒輪驅(qū)動截止閥，包括止回型截止閥，高壓關(guān)閉試驗應(yīng)在用于確定操作器尺寸的設(shè)計壓差的110%下進行。f所有指定為雙截斷閥和放氣閥的閥門都需要進行高壓關(guān)閉試驗。表2-壓力試驗閥門： 類別>600試驗說明閥型閘閥截止閥止回閥浮球蝶閥和耳軸安裝球殼需要需要需要需要的需要需要的后座需要的需要的NA NA NA低壓關(guān)閉可選b可選b需要的可選b高壓關(guān)閉c必需必需必需必需可選必需注釋NA=不適用。a除波紋管密封閥外，所有具有后座功能的閥門都需要進行后座試驗。b當買方規(guī)定進行“可選”試驗時，除要求的試驗外，還應(yīng)進行試驗。c彈性閥座閥的高壓關(guān)閉試驗可能會降低低壓環(huán)境下的后續(xù)密封性能。
These inspections shall be carried out by the valve manufacturer in the presence of the Purchaser's inspector. 5 Pressure test 5.1 The pressure test at the test site shall be conducted by the valve manufacturer in the valve manufacturer's factory or in a facility jointly agreed by the manufacturer and the buyer. 5.2 Test equipment The equipment used by the valve manufacturer to conduct the required pressure test shall not exert external forces that affect the valve seat leakage. If end clamps are used, the valve manufacturer shall be able to demonstrate that the test fixture will not affect the seat sealing capability of the valve under test. For valves designed to fit between flanges, such as wafer check valves and wafer butterfly valves, end clamping is allowed. 5.3 Required Tests 5.3.1 Each valve shall be subjected to the pressure tests listed in Table 1 or Table 2 according to the written procedures in accordance with this standard. 5.3.2 Unless otherwise specified in the purchase order, the manufacturer may choose to perform a high pressure or low pressure backseat test on the valve with backseat function. 5.3.3 Valves with a nominal diameter of 100 (NPS 4) and below shall be tested according to Table 1 if their pressure ratings are up to and including ASME Class 1500 and those with a nominal diameter of more than 100 (NPS 3) are up to and including ASME Class 600. The Purchaser may choose to require the "optional" pressure test in Table 1. Valves with a pressure rating greater than ASME Class 1500 and valves with a pressure rating greater than DN 100 (NPS 4) and greater than ASME Class 600 shall be tested in accordance with Table 2. The purchaser may elect to require the "optional" pressure test in Table 2. 5.3.5 The leakage rate of reducing valve shall be based on DN (NPS) of the valve. Copyright American Petroleum Institute is provided by IHS according to API license. License holder=University of Alberta/5966844001, user=sam, albert shall not be copied or connected to the Internet or resold without permission of IHS. At 16:13:35 on June 28, 2013, MDT valve inspection and test 5 Table 1 - Pressure test valve: except for bellows seal valve, all valves with backseat function shall be subject to backseat test. B For lubricating plug valve, high pressure closing test is mandatory, and low pressure closing test is optional. C When the Buyer specifies the "optional" test, the test shall be conducted in addition to the required test. D. High pressure closing test of resilient seated valve may reduce the subsequent sealing performance under low pressure environment. E For electric and manual gear driven globe valves, including check type globe valves, the high pressure closure test shall be performed at 110% of the design differential pressure used to size the operator. F All valves designated as double block valves and vent valves shall be subject to high-pressure closing test. Table 2 - Pressure test valves: Category>600 Test shows that valve type gate valve, globe valve, check valve, float butterfly valve and trunnion installation ball shell need to need to need to need to need to need to need to need to need to need to need to need to need to NA NA low pressure closing optional b optional b optional b high-pressure closing c mandatory mandatory mandatory mandatory mandatory mandatory mandatory note NA=not applicable. A Except for bellows seal valve, all valves with backseat function shall be subject to backseat test. B When the Buyer specifies the "optional" test, the test shall be conducted in addition to the required test. C High pressure closing test of resilient seated valve may reduce the subsequent sealing performance under low pressure environment.
