MVME177PA-66SE工控備件模塊
11 150 250級(jí)（鑄鐵）DN 50至300（NPS 2至12）35 500 DN 350至600（NPS 14至24）21 300 150級(jí)（球墨鑄鐵）17 250 300級(jí)（球鐵）44 640碳、合金、不銹鋼和特殊合金b b低壓關(guān)閉（見(jiàn)表1和表2）4至7 60至100 a所有具有此功能的閥門(mén)都需要進(jìn)行后座試驗(yàn)。b根據(jù)適用的采購(gòu)規(guī)范，在38°C（100°F）時(shí)為最大允許壓力的110%。c根據(jù)適用的采購(gòu)規(guī)范，在38°c（100°F）時(shí)為設(shè)計(jì)壓差的110%。d所示單個(gè)值為最小試驗(yàn)壓力。數(shù)值范圍表示最小和最大測(cè)試壓力。版權(quán)所有美國(guó)石油學(xué)會(huì)由IHS根據(jù)API許可證提供，許可證持有人=阿爾伯塔大學(xué)/5966844001，用戶(hù)=sam，albert未經(jīng)IHS許可不得復(fù)制或聯(lián)網(wǎng)，不得轉(zhuǎn)售，2013年6月28日16:13:35 MDT閥門(mén)檢驗(yàn)和測(cè)試9 6.1.4關(guān)閉測(cè)試閥門(mén)時(shí)，閥門(mén)制造商的測(cè)試程序應(yīng)確保不會(huì)使用過(guò)大的力關(guān)閉閥門(mén)。施加的力可根據(jù)MSS SP-91中的適當(dāng)數(shù)字確定，但在任何情況下都不得超過(guò)閥門(mén)制造商公布的值。
6.1.5在閥門(mén)完全準(zhǔn)備好并處于全試驗(yàn)壓力下后，應(yīng)目視檢查閥門(mén)是否泄漏。6.2后座試驗(yàn)6.2.1除波紋管密封閥外，所有具有后座特性的閥門(mén)都需要進(jìn)行后座試驗(yàn)，后座試驗(yàn)應(yīng)在閥端關(guān)閉、閥門(mén)完全打開(kāi)、填料壓蓋松動(dòng)或未安裝填料的情況下，在組裝好的閥門(mén)內(nèi)施加壓力。如果在殼體試驗(yàn)后進(jìn)行后座試驗(yàn)，應(yīng)在后座試驗(yàn)后安裝填料和/或重新緊固填料壓蓋。6.2.2對(duì)于DN 100（4 in.NPS）及以下的閥門(mén)，當(dāng)使用容積裝置監(jiān)測(cè)殼體和后座泄漏時(shí)，后座試驗(yàn)可與殼體試驗(yàn)相結(jié)合。采用該方法進(jìn)行測(cè)試時(shí)，包裝應(yīng)松散。制造商應(yīng)負(fù)責(zé)證明填料在38°C（100°F）的閥門(mén)額定壓力下不會(huì)泄漏。6.2.3后座試驗(yàn)的成功完成不應(yīng)被解釋為閥門(mén)制造商的建議，即當(dāng)閥門(mén)受壓時(shí)，可重新包裝閥門(mén)或更換填料。6.3外殼試驗(yàn)除非6.2.2中另有規(guī)定，外殼試驗(yàn)應(yīng)通過(guò)在組裝閥門(mén)內(nèi)部施加壓力進(jìn)行，閥門(mén)端部關(guān)閉，閥門(mén)部分打開(kāi)，任何填料壓蓋足夠緊密以保持試驗(yàn)壓力，從而對(duì)填料函進(jìn)行試驗(yàn)（波紋管密封閥除外）。
11 150 Class 250 (cast iron) DN 50 to 300 (NPS 2 to 12) 35 500 DN 350 to 600 (NPS 14 to 24) 21 300 Class 150 (ductile iron) 17 250 Class 300 (ductile iron) 44 640 Carbon, alloy, stainless steel and special alloy b b Low pressure closing (see Tables 1 and 2) 4 to 7 60 to 100 a All valves with this function require a backseat test. B 110% of the maximum allowable pressure at 38 ° C (100 ° F) according to the applicable procurement specification. C 110% of the design differential pressure at 38 ° c (100 ° F) according to the applicable procurement specification. D The individual values shown are the minimum test pressures. The range of values represents the minimum and maximum test pressures. Copyright American Petroleum Institute is provided by IHS according to the API license. The license holder=University of Alberta/5966844001, user=sam, albert shall not be copied or connected to the Internet or resold without permission of IHS. On June 28, 2013, 16:13:35 MDT valve inspection and testing 9 6.1.4 When closing the test valve, the valve manufacturer's test procedure shall ensure that the valve will not be closed with excessive force. The applied force may be determined according to the appropriate figure in MSS SP-91, but in no case shall it exceed the value published by the valve manufacturer.
6.1.5 After the valve is fully prepared and under full test pressure, the valve shall be visually inspected for leakage. 6.2 Backseat test 6.2.1 Except for the bellows seal valve, all valves with backseat characteristics shall be subject to backseat test. The backseat test shall apply pressure to the assembled valve when the valve end is closed, the valve is fully opened, the packing gland is loose or no packing is installed. If the backseat test is performed after the shell test, install the packing and/or retighten the packing gland after the backseat test. 6.2.2 For valves DN 100 (4 in. NPS) and below, the backseat test can be combined with the shell test when a volumetric device is used to monitor shell and backseat leakage. When this method is used for testing, the packaging shall be loose. It is the responsibility of the manufacturer to demonstrate that the packing will not leak at the valve rated pressure of 38 ° C (100 ° F). 6.2.3 The successful completion of the backseat test shall not be interpreted as the valve manufacturer's recommendation that the valve be repackaged or the packing replaced when the valve is under pressure. 6.3 Shell test Unless otherwise specified in 6.2.2, the shell test shall be conducted by applying pressure inside the assembled valve, closing the valve end, partially opening the valve, and keeping any packing gland tight enough to maintain the test pressure, so as to test the stuffing box (except for the bellows seal valve).
