. . . .Miscellaneous Miscellaneous：混杂的，各种各样的 Designation Designation：名称，称呼；任命，选派s 代号图例一览COR: Center of Range 量程中心DA: Aeration Aeration：通风，吹气 Point Using Air 空气吹扫点DG: Aeration Point Using Gas 瓦斯吹扫点DN: Aeration Point Using Nitrogen 氮气吹扫点DS: Aeration Point Using Steam 蒸汽吹扫点INS: Insulate 隔热LCV: Steam Trap-Ball float type 浮球式蒸汽疏水阀PSE: Rupture Disc Assembly 爆破片PTP: Pipe tap Plugged 丝堵PWHT: Post weld Heat Treat 焊后热处理RO: Restriction Orifice 限流孔板SN: Sample Number 采样点VB: Vortex Vortex：漩涡，涡流 Breaker 防涡流挡板WISI: Winterize Winterize：为过冬做准备 With Heat Trace Between Spacer and Insulation 伴热XCV: Steam Trap All Traps other than Ball float type 非浮球式蒸汽疏水阀Base Line 基线Drain funnel with water seal control or optional closed drain system with closed venting to an emission Emission：发出散发（辐射）排放 control device per US EPA Regulations.带水封控制的漏斗或可选按照美国EPA标准制造的带密闭排放至排放设备的密闭排放系统。PSV: Pressure Relief System 安全阀Free draining requirement denotes Non-pocketed, gravity flow line with indicated direction of flow.自流要求无袋形，是按照指定方向流动的重力流。Spectacle Spectacle：壮观的场面或情境；眼镜 blind 八字盲板Y type Strainer Y型过滤器T type Strainer T型过滤器Basket type Strainer 篮式过滤器Letters on strainers Designate 过滤器上字母含义XN: Type 316 stainless steel internals in compliance with NACE MR0103 按照NACE MR0103标准的316不锈钢内部件General line style designations一般线型含义Primary piping主要管线Secondary piping次要管线Piping and equipment shown on other P and I diagrams其他PID图上的管线和设备Future piping and equipment预留管线和设备Heat trace and insulate to main temperature as indicated in degrees Fahrenheit Fahrenheit：华氏温度的 or Centigrade维持指定温度的伴热线Distribute Control Shared Display Symbols DCS符号含义Shared display device with limited access to adjustments 屏幕显示，调节权限受限Shared display indicator, controller, or other device with operator access to adjustments 屏幕显示、指示、控制，有操作员调节权限。Software alarms with shared display device * is measured variable 屏幕指示报警*是测量变量。Critical software alarm * is measured variable 紧急软报警Critical shutdown alarm 紧急停车报警Logic system with limited access to adjustment具有调节权限的逻辑系统Function Identification Identification：定义，辨别，鉴定函数定义Refer to list below for identification参照下列定义General instrument symbols一般仪表符号instrument located in field就地安装仪表instrument mount Mount：安装，设置ed on local panel就地盘面安装仪表instrument mounted on console Console：控制台，仪表板 or panel Panel：面板，仪表板盘面或台面安装仪表instrument mounted on rack Rack：架子，支架 or behind panel盘后或台内安装仪表instrument with dual function (or services)双重功能仪表管道式安装流量计 diaphragm Diaphragm：隔膜，膜片；光圈调节器 seal膜片密封orifice plate孔板prefabricate Prefabricate：预设，预装d meter run预装的流量计导管Furnish Furnish：陈设，布置；提供ed with prefabricated meter run where specified与有要求的预装流量计导管配套Function Identification of InstrumentsFirst letter首字母Subsequent letters后继字母Measured variable被测变量Modifier修饰词Readout信息显示Output输出AAnalysis分析Alarm报警BBurner flame喷嘴火焰CCompensated补偿Control控制DDifferential差EPrimary element基本元件FFlow流量Ratio(fraction)比率（分数）GGlass, gauge视镜，仪表HHand(manual)手动ICurrent电流Indicate指示JPower功率Scan扫描KTime rate of change变化速率Control station控制站LLevel液位Light灯OOrifice孔板PPressure, vacuum压力真空Point(test conn)点（检测连接）QQuantity数量Integrate, totalize积算，累积RRecord记录SSpeed, frequency速度，频率Safety安全Switch开关TTemperature温度Transmitter变送器UMultivariable多变量VVibration震动Valve阀WWeight重量Well套管XSkin表面YRelay, compute继电器，计算ZPosition位置Instrument line symbols 仪表线代号capillary tubing(filled system)毛细管（充满式系统）electric binary signal(on-off)电动二进制信号线（开关）electric signal电信号线electromagnetic or sonic signal电磁或声信号线hydraulic signal液压信号线pneumatic signal气压信号线process connection or mechanical link过程连接或机械连接线software link系统内部软连接宁可累死在路上，也不能闲死在家里！宁可去碰壁，也不能面壁。是狼就要练好牙，是羊就要练好腿。什么是奋斗？奋斗就是每天很难，可一年一年却越来越容易。不奋斗就是每天都很容易，可一年一年越来越难。能干的人，不在情绪上计较，只在做事上认真；无能的人！不在做事上认真，只在情绪上计较。拼一个春夏秋冬！赢一个无悔人生！早安！献给所有努力的人.学习参考