MVME187-033B输入输出模块
API推荐规程591，工艺阀门评定程序API推荐规程621，金属闸阀、截止阀和止回阀的修复ASME B16.11 1，承插焊和螺纹锻造管件ASME B16.34，法兰、螺纹和焊接端阀门MSS SP-45 2，旁通和排水连接MSS SP-55，阀门钢铸件质量标准，法兰、管件和其他管道部件-表面不规则性的目视评估方法MSS SP-91，阀门手动操作指南3术语和定义在本文件中，以下定义适用。3.1后座试验用于验证阀杆或轴至阀盖密封（后座）泄漏的压力试验。3.2等级用于指定阀门或管道部件的压力温度额定值的无量纲数。3.3关闭试验用于确认阀门关闭机构泄漏的压力试验。3.4冷工作压力CWP环境温度下的额定压力。3.5公称直径DN管道系统中使用的部件常用的字母数字尺寸名称，用于参考目的，包括字母DN和与孔的物理尺寸或端部连接的外径间接相关的无量纲数字（视情况而定）。DN后面的无量纲数不代表可测量值，
除非ASME B16.34中有规定，否则不用于计算目的。DN的使用适用于带有PN名称的钢阀门。1 ASME International，3 Park Avenue，New York，New York 10016-5990，www.ASME.org。2阀门和配件行业制造商标准化协会，股份有限公司，127 Park Street，NE，Vienna，Virginia，22180-4602，www.mss-hq.com。版权所有美国石油学会由IHS根据API许可证提供，许可证持有人=阿尔伯塔大学/5966844001，用户=sam，albert未经IHS许可，不得复制或联网，不得转售，2013年6月28日16:13:35 MDT VALVE INSPECTION AND TESTING 3 3.6双截断和泄放阀阀，具有两个阀座表面，当处于关闭位置时，当阀座表面之间的空腔通过设置在体腔中的排放连接件排出时，阻止来自两个阀端的流动。3.7公称管道尺寸NPS管道系统中使用的部件常用的字母数字尺寸名称，用于参考目的，包括字母NPS和与孔的物理尺寸或端部连接的外径间接相关的无量纲数字（视情况而定）。NPS后面的无量纲尺寸识别号不代表可测量值，除非ASME B16.34中另有规定，否则不用于计算目的。
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.
