MVME187-033B輸入輸出模塊
API推薦規程591，工藝閥門(mén)評定程序API推薦規程621，金屬閘閥、截止閥和止回閥的修復ASME B16.11 1，承插焊和螺紋鍛造管件ASME B16.34，法蘭、螺紋和焊接端閥門(mén)MSS SP-45 2，旁通和排水連接MSS SP-55，閥門(mén)鋼鑄件質(zhì)量標準，法蘭、管件和其他管道部件-表面不規則性的目視評估方法MSS SP-91，閥門(mén)手動(dòng)操作指南3術(shù)語(yǔ)和定義在本文件中，以下定義適用。3.1后座試驗用于驗證閥桿或軸至閥蓋密封（后座）泄漏的壓力試驗。3.2等級用于指定閥門(mén)或管道部件的壓力溫度額定值的無(wú)量綱數。3.3關(guān)閉試驗用于確認閥門(mén)關(guān)閉機構泄漏的壓力試驗。3.4冷工作壓力CWP環(huán)境溫度下的額定壓力。3.5公稱(chēng)直徑DN管道系統中使用的部件常用的字母數字尺寸名稱(chēng)，用于參考目的，包括字母DN和與孔的物理尺寸或端部連接的外徑間接相關(guān)的無(wú)量綱數字（視情況而定）。DN后面的無(wú)量綱數不代表可測量值，
除非ASME B16.34中有規定，否則不用于計算目的。DN的使用適用于帶有PN名稱(chēng)的鋼閥門(mén)。1 ASME International，3 Park Avenue，New York，New York 10016-5990，www.ASME.org。2閥門(mén)和配件行業(yè)制造商標準化協(xié)會(huì )，股份有限公司，127 Park Street，NE，Vienna，Virginia，22180-4602，www.mss-hq.com。版權所有美國石油學(xué)會(huì )由IHS根據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，不得復制或聯(lián)網(wǎng)，不得轉售，2013年6月28日16:13:35 MDT VALVE INSPECTION AND TESTING 3 3.6雙截斷和泄放閥閥，具有兩個(gè)閥座表面，當處于關(guān)閉位置時(shí)，當閥座表面之間的空腔通過(guò)設置在體腔中的排放連接件排出時(shí)，阻止來(lái)自?xún)蓚€(gè)閥端的流動(dòng)。3.7公稱(chēng)管道尺寸NPS管道系統中使用的部件常用的字母數字尺寸名稱(chēng)，用于參考目的，包括字母NPS和與孔的物理尺寸或端部連接的外徑間接相關(guān)的無(wú)量綱數字（視情況而定）。NPS后面的無(wú)量綱尺寸識別號不代表可測量值，除非ASME B16.34中另有規定，否則不用于計算目的。
API Recommended Practice 591, Process Valve Qualification Procedure API Recommended Practice 621, Repair of Metal Gate Valves, Globe Valves and Check Valves ASME B16.11 1, Forged Socket Welding and Threaded Fittings ASME B16.34, Flanged, Threaded and Welding End Valves MSS SP-45 2, Bypass and Drain Connections MSS SP-55, Quality Standards for Valve Steel Castings, Flanges, Pipe Fittings and Other Piping Components - Visual Assessment Method for Surface Irregularities MSS SP-91, The terms and definitions in Manual Operation Guide 3 of the valve are in this document, and the following definitions apply. 3.1 Backseat test is a pressure test used to verify the leakage of valve stem or shaft to bonnet seal (backseat). 3.2 Class is used to specify the dimensionless number of pressure temperature ratings of valves or piping components. 3.3 Closing test is a pressure test to confirm the leakage of the valve closing mechanism. 3.4 Cold working pressure CWP Rated pressure at ambient temperature. 3.5 Nominal diameter DN Alphanumeric size designation commonly used for components in piping systems, for reference purposes, including the letter DN and dimensionless numbers indirectly related to the physical size of the hole or the outside diameter of the end connection, as appropriate. The dimensionless number following DN does not represent a measurable value,
It is not used for calculation purposes unless specified in ASME B16.34. The use of DN applies to steel valves with PN designation. 1 ASME International，3 Park Avenue，New York，New York 10016-5990，www.ASME. org。 2 Manufacturers Standardization Association of Valve and Fittings Industry, Inc., 127 Park Street, NE, Vienna, Virginia, 22180-4602, www.mss-hq com。 Copyright American Petroleum Institute, provided by IHS under API license, licensee=University of Alberta/5966844001, user=sam, albert, without license from IHS, shall not be copied or networked, and shall not be resold. On June 28, 2013, 16:13:35 MDT VALVE INSPECTION AND TESTING 3 3.6 double block and bleed valve, with two seat surfaces, When the cavity between the valve seat surfaces is discharged through the discharge connector arranged in the body cavity, the flow from the two valve ends is blocked. 3.7 Nominal Pipe Sizes NPS Alphanumeric size designations commonly used by components in piping systems for reference purposes, including the letters NPS and dimensionless numbers indirectly related to the physical size of the hole or the outside diameter of the end connection, as appropriate. The dimensionless dimension identification numbers following the NPS do not represent measurable values and are not used for calculation purposes unless otherwise specified in ASME B16.34.
