仪表PID图例符号

注：1.“供选用”的字母，指的是在个别设计中多次使用，而上表中未予规定其含意。

使用时该字母含义需在具体工程的设计图例中作出规定，第一位字母表示一种含意，而作为后继字母则表示另一种含意。

例如，字母N作为第一位字母时，含意可为应力；而作为后继字母时，含意可为示波器。

2.“未分类”的字母X，上表中未予规定其含意，适用于在一个设计中仅一次或有限的几次使用，它在不同地点作为第一位字母或作为后继字母均可有任何含意。

例如，XR-1可以是应力记录，XX-2则可以是应力示波器，但是要求在仪表圆圈之外注明“未分类”字母X的含意。

3.后继字母的确切含意，根据实际需要可以有不同的解释。

例如，I可以是指示仪、指示或指示的；T可以是变送器、变送、变送的。

4.被测变量的任何第一位字母若与修饰字母D(差)、F（比）、M（瞬间）、K（变化速率）、Q（积算或累计）中任何一个组合在一起，则表示另外一种含意的被测变量。

因此应把被测变量的字母与修饰字母的组合视为一体来看待。

例如，TDI和TI分别为温差指示和温度指示，这些修饰字母仅在特定情况下使用。

5.分析变量的字母A，包括表未予规定的分析项目。

当有必要表明具体的分析项目时，仪表圆圈中仍写A，一般在圆圈外右上方写出具体的分析项目。

例如分析CO2含量，应在圆圈外标注CO2，而不能用CO2代替圆圈内的字母A。

6.第一位字母的U表示多变量，用来表示代替多个变量的字母结合。

7.后继字母U表示多功能，用来表示代替多个功能的字母结合。

8.修饰字母S表示安全，仅用于紧急保护的检测仪表或检测元件及最终控制元件。

例如，PSV表示非常状态下起保护作用的压力卸放阀或切断阀。

亦可用于事故压力条件下进行安全保护的阀门，而爆破膜则用PSE 来标识（此符号不表示专业分工，仅用来说明符号的使用）。

9.后继字母G表示用于对过程检测观察而无标度的仪表，例如视镜、电视监视器等。

10.后继字母I适用于可读出模拟量或数字被测值的场合，就手动操作器而言，它可用于标度盘或设定值的指示。

LINE SERVICE IDENTIFICATIONSYMBOL SERVICE符号帮助AIR SYSTEMS空气系统IA INSTRUMENT AIR仪表风PA PLANT AIR工厂风DA 烧焦空气STEAM AND CONDENSATE SYSTEMS蒸汽和凝液系统HC HIGH PRESSURE CONDENSATE高压蒸汽凝液MC MEDIUM PRESSURE CONDENSATE中压蒸汽凝液LC LOW PRESSURE CONDENSATE低压蒸汽凝液SC SURFACE CONDENSATE表面凝液DS DILUTION STEAM稀释蒸汽HS HIGH PRESSURE STEAM高压蒸汽MS MEDIUM PRESSURE STEAM中压蒸汽LS SUPERHEATED LOW PRESSURE STEAM过热低压蒸汽PS SATURATED LOW PRESSURE STEAM饱和低压蒸汽SHS SUPER HIGH PRESSURE STEAM超高压蒸汽DRAIN SYSTEMS排放系统CD CHEMICAL DRAIN化污LD LIQUID DRAIN液体排放ND NON-CONTAMINATED POLLUTION DRAIN无污染排放OD OILY DRAIN油污EXHAUST AND VENT SYSTEMSA V ATMOSPHERIC VENT (NOT FROM PSV)通大气（不从安全阀）SV SAFETY V ALVE TO ATMOSPHERE安全伐排大气FLARE SYSTEMS火炬系统DF DRY FLARE干火炬WF WET FLARE湿火炬GAS SYSTEMS气体系统FG FUEL GAS燃料气HG HYDROGEN氢气NG NITROGEN氮气SPECIAL LIQUID SYSTEMS特殊液体系统CL CAUSTIC腐蚀性QO QUENCH OIL急冷油SO SEAL OIL密封油WO WASHING OIL冲洗油（压缩机）PROCESS SERVICE (NORMAL)P PROCESS工艺REFRIGERANT SYSTEMSBR BINARY REFRIGERANT二元制冷PR PROPYLENE REFRIGERANT丙烯冷剂WATER SYSTEMS水系统BFW BOILER FEED WATER锅炉给水FW FIRE WATER消防水IW INTERMEDIATE WATER二次水CWR COOLING WATER RETURN冷却水回水CWS COOLING WATER SUPPLY冷却水PW POLISHED WATER工艺水QW QUENCH WATER急冷水UW UTILITY WATER工业水WW WASTE WA TER废水MISCELLANEOUS ABBREVIATION AND SERVICE SYMBOLS 各种缩写和符号A AIR MOTOR空气马达ACC ACCESSIBLE可接近的ATM ATMOSPHERE大气BL BATTERY LIMIT界区BTS BUBBLE TIGHT SHUT-OFF缓慢紧密切断BV BY VENDOR由供应商提供CONN CONNECTION连接CSC CAR SEAL CLOSED关闭锁定CSO CAR SEAL OPEN打开锁定DEC DETAIL ENGINEERING CONTRACTOR 工程承包商详细资料EOR END OF RUN运行结束SOREW EYEWASH洗眼FLG FLANGE法兰LC LOCKED CLOSED锁定关闭LO LOCKED OPEN锁定打开NC NORMALLY CLOSED正常情况下关闭NNF NORMALLY NO FLOW正常情况下无流量NO NORMALLY OPEN正常情况下打开S SAMPLE CONNECTION取样点SC SAMPLE CONNECTION WITH COOLER 连接冷却器的取样点SOR START OF RUN开始运行SR STRAINER过滤器SS SAFETY SHOWER安全喷淋T LINE DRIP TRAP疏水器TSO TIGHT SHUT OFF密闭切断UC UTILITY CONNECTION公用工程接口LINESMAIN LINE主线SECONDARY LINE副线UNDERGROUND OR BURY地下或隐藏ELECTRICALLY TRACED电缆线SPECIAL TRACED特殊管线STEAM TRACED蒸汽伴热JACKETED夹套PACKAGED EQUIP BOUNDARY成套设备分界线BATTERY LIMIT BOUNDARY界区分界线FUTURE未来MATERIAL SPEC BREAK材料规格分界点DESIGN BREAK设计分界点BELOW GROUND LINE RISING ABOVE GRADE 地管伸出点BREAK OF REPONSIBILITY责任分界点MISCELLANEOUS ITEMS各种细节ROD OUT CONNECTIONCLEAN OUT CONNECTION (FLUSHING)清理接口（冲洗）REMOV ABLE SPOOL可拆除短管NOZZLE OR PIPE WITH BLIND FLANGE 带盲法兰的喷嘴或管线SPACER FOR BLIND盲管位置NORMALLY CLOSED正常情况下关闭NORMALLY OPEN正常情况下打开FIGURE BB 图REVERSIBLE BLIND8字盲板ORIFICE SWAGE孔板INSULATED FLANGED JOINT保温法兰连接PIPE CAP (WELDED)管帽（焊接）PIPE CAP (SCREWED)管帽（法兰）REDUCER变径管T-STRAINERT型过滤器PERMANENT Y-STRAINER (WITH V ALVE) 带阀门Y型过滤器TEMPORARY STRAINER临时过滤器HOSE CONNECTIONSAMPLE CONNECTION取样口**-SERVICE SYMBOL符号说明SEQUENCE NUMBER序列号OPEN DRAIN HUB敞口集液器MATERIAL BALANCE STREAM NUMBER 物流号CONTINUTY ARROW延续箭头INITIAL FEED初始进料GRADE等级TRENCH地沟LINE IDENTIFICATION管线说明INSULATION CODE保温代码MATERIAL SPECIFICATION材质BRANCH IDENTIFIER分支标识SEQUENCE NUMBERPROCESS SECTION AREA(MAY BE SINGLE DIGIT) 工艺区LINE SERVICE SYMBOL管线符号说明LINE SIZE管线尺寸V ALVESGATE V ALVE闸阀BUTTERFLY V ALVE蝶阀DIAPHRAGM V ALVE隔膜阀GLOBE V ALVE球阀NEEDLE V ALVE针型阀PLUG V ALVE截止阀BALL V ALVE球阀CHECK V ALVE止逆阀STOP CHECK V ALVE(BOILER NON-RETURN V ALVE) 带手轮止逆阀THREE 0R FOUR V ALVE三通或四通阀MULTI PORT PLUG多向切断阀ANGLE V ALVE角阀DUAL TANDEM BLOWNDOWN V ALVES两段排污阀RAN TYPE V ALVER型阀T-TYPE GLOBE V ALVET型球阀AUTOMATIC RECIRCULATION V ALVE自动再循环阀INTERLOCKED V ALVES(MECHANICAL LINK))机械联动阀QUICK OPENING OR CLOSING V ALVE快速开关阀V ALVE WITH BODY CA VITY RELIEF OR BODY BLEED CONNECTION带有排放阀的阀门DAMPER挡板APPROPRIATE ABBREVIATION合适的缩写SLIDE GATE V ALVE滑动闸阀EQUIPMENT IDENTIFACATION设备符号SUPPLIED WITH VENDOR EQUIPMENT供应商提供的设备SPARE(A,B,C,ETC USED IF PARALLEL UNITS)同一设备的编号SEQUENCE NUMBER序列号AREA NUMBER区号EQUIPMENT CODE OF ACCOUNT设备代码UNIT DESIGNATION单元名称E – ETHYLENE乙烯H - DPG HYDROGENATION汽油加氢U - UTILITY & OFF SITE公用工程PIPING SPECIALTY ITEMS ANDMISCELLANEOUS EQUIPMENT特殊管项和各种设备ALL PIPING SPECIALTY ITEMS ARE IDENTIFIED所有特殊管线有以下注明SEQUENCE NUMBER ( NUMBERED IN SAME WAY AS INSTRUMENT )序列号（与仪表排序相同）EXHAUST HEAD负呀总管ATOMPHERIC VENT WITH WEATHER CAP防雨放空管DUPLEX STRAINER相同的过滤器PERMANENT BASKET STRAINER提篮式过滤器FLEXIBLE HOSE金属软管EXPANSION JOINT膨胀节INLINE MIXERS OR VENTURI TYPE DESUPER HEATER 内嵌式混合器或文丘里型混合器SILENCER消音器EJECTOR OR EDUCTOR喷射器FILTER过滤器FILTER WITH HOOD带罩过滤器CONDENSATE TRAP (NON-PROCESS)凝液疏水器FIRE PROTECTION消防FIRE HYDRANT消防炮FIRE HYDRANT WITH MONITOR带监视器的消防栓FIRE HYDRANT WITH PUPPER CONNECTION消防栓HOSE HOUSE消防箱V ALVE WITH INDICATOR POST 带指示的阀MONITOR监视器EM IF ELEV ATEDPUMP泵CENTRIFUGAL离心泵METERING OR RECIPROCATING 计量泵或往复式泵ROTARY {GEAR ,SCREW }齿轮泵VERTICAL SUMP PUMP立式污水泵VERTICAL CANNEDPUMP (PFD ONLY ALL TYPES) 泵LIQUID RING V ACUUM PUMP 水环式真空泵COMPRESSOR压缩机SINGLE STAGE RECIPROCATINGMULTI-STAGE RECIPROCATINGCENTRIFUGAL离心式ROTARY旋转式BLOWER FAN鼓风机BLOWER (PFD ONLY ALL TYPES) 鼓风机COMPRESSOR (PFD ONLY)压缩机SCREW螺杆式DRIVER驱动装置ELECTRIC MOTOR电动马达DIESEL ENGINE .ETC柴油发动机APPROPRIATE ABBREVIATION相应的缩写A AIR空气D DIESEL柴油H HYDRAULIC水力的M ELECTRIC电气的STEAM TURBINE蒸汽涡轮EXPANDER扩大室HEAT EXCHANGER换热器SHELL AND TUBE HEAT EXCHANGER管壳式换热器HORIZONTAL SHELL AND TUBE HEAT EXCHANGER 水平式管壳式换热器VERTICAL SHELL AND TUBE HEAT EXCHANGER垂直式管壳式换热器SINGEL SECTION DOUBLE PIPE EXCHANGERTWO SECTION DOUBLE PIPE EXCHANGERAIR COOLER空冷器AIR COOLER (PFD ONLY)空冷器KETTLE TYPE REBOILER OR STEAM GENERATOR KETTLE TYPE EXCHANGER (PFD ONLY)GRAPHITE BLOCK TYPE EXCHANGER PLATE EXCHANGERDRAWING IDENTIFICATION图形说明REVISION NO.修订号DRAWING NO.图号AREA NO.区号JOB NO.工号DRAWING SIZEVESSELS AND FURNACES容器和炉子FLOATING ROOF TANK浮顶罐CONE ROOF TANK WITH INTERNAL COIL 带内盘管锥型顶罐COLUMN柱型PACKINGINTERNAL BAFFLEVORTEX BREAKER旋风分离器CABIN TYPE HEATER WITH EXTERNAL CROSS-OVERSHORIZONAL TYPE HEATER WITH INTERNAL CROSSOVERS 内部有交叉的水平加热管VESSEL ELEV ATIONS离地面高度INSULATION CODE保温代码D ANTI-SWEAT INSULATION防水保温E ELECTRICAL TRACINGF FULL HEAT CONSERV ATIONH NORMAL HEAT CONSERV ATION一般保温M DUAL SERVICE INSULATIONP PERSONNEL PROTECTION防护人员S SPECIAL特殊的T STEAM TRACINGV ACOUSTICAL听力的BREAK OF RESPONSIBILITYSYMBOL FOR LOCATION OF TIE-IN POINT CONNECTEDU NEW ETHYLENE STORAGE AREA乙烯新区的V OSBL (ON NORTH SIDE RACK)W OSBL (ON MAIN RACK IN FRONT OF NEW HEATER)X OSBL (ON SOUTH SIDE RACK)Y OSBL (COOLING WATER)E EXISTING AREAD DPG AREAC4 C4 HYDRO AREAD(W) DPG AREA AND THROUGH THE TIE-IN POINT(W) ON THE RACKC4(U) C4 HYDRO AREA AND THROUGH THE TIE-IN POINT(U) ON THE RACKE(W) EXISTING AREA AND THROUGH TIE-IN POINT(W) ON THE RACKE(X) EXISTING AREA AND THROUGH TIE-IN POINT(X) ONTHE RACKGENERAL NOTES1. FOR INSTRUMENTATION SYMBOLS SEE DWG仪表符号参阅图DWG2. FLOW DIAGRAMS ARE DIAGRAMATIC ONLY 。

LINE SERVICE IDENTIFICATIONSYMBOL SERVICE符号帮助AIR SYSTEMS空气系统IA INSTRUMENT AIR仪表风PA PLANT AIR工厂风DA 烧焦空气STEAM AND CONDENSATE SYSTEMS蒸汽和凝液系统HC HIGH PRESSURE CONDENSATE高压蒸汽凝液MC MEDIUM PRESSURE CONDENSATE中压蒸汽凝液LC LOW PRESSURE CONDENSATE低压蒸汽凝液SC SURFACE CONDENSATE表面凝液DS DILUTION STEAM稀释蒸汽HS HIGH PRESSURE STEAM高压蒸汽MS MEDIUM PRESSURE STEAM中压蒸汽LS SUPERHEATED LOW PRESSURE STEAM过热低压蒸汽PS SATURATED LOW PRESSURE STEAM饱和低压蒸汽SHS SUPER HIGH PRESSURE STEAM超高压蒸汽DRAIN SYSTEMS排放系统CD CHEMICAL DRAIN化污LD LIQUID DRAIN液体排放ND NON-CONTAMINATED POLLUTION DRAIN无污染排放OD OILY DRAIN油污EXHAUST AND VENT SYSTEMSAV ATMOSPHERIC VENT (NOT FROM PSV) 通大气（不从安全阀）SV SAFETY VALVE TO ATMOSPHERE安全伐排大气FLARE SYSTEMS火炬系统DF DRY FLARE干火炬WF WET FLARE湿火炬GAS SYSTEMS气体系统FG FUEL GAS燃料气HG HYDROGEN氢气NG NITROGEN氮气SPECIAL LIQUID SYSTEMS特殊液体系统CL CAUSTIC腐蚀性QO QUENCH OIL急冷油SO SEAL OIL密封油WO WASHING OIL冲洗油（压缩机）PROCESS SERVICE (NORMAL)P PROCESS工艺REFRIGERANT SYSTEMSBR BINARY REFRIGERANT二元制冷PR PROPYLENE REFRIGERANT丙烯冷剂WATER SYSTEMS水系统BFW BOILER FEED WATER锅炉给水FW FIRE WATER消防水IW INTERMEDIATE WATER二次水CWR COOLING WATER RETURN冷却水回水CWS COOLING WATER SUPPLY冷却水PW POLISHED WATER工艺水QW QUENCH WATER急冷水UW UTILITY WATER工业水WW WASTE WATER废水MISCELLANEOUS ABBREVIATION AND SERVICE SYMBOLS 各种缩写和符号A AIR MOTOR空气马达ACC ACCESSIBLE可接近的ATM ATMOSPHERE大气BL BATTERY LIMIT界区BTS BUBBLE TIGHT SHUT-OFF缓慢紧密切断BV BY VENDOR由供应商提供CONN CONNECTION连接CSC CAR SEAL CLOSED关闭锁定CSO CAR SEAL OPEN打开锁定DEC DETAIL ENGINEERING CONTRACTOR工程承包商详细资料EOR END OF RUN运行结束SOREW EYEWASH洗眼FLG FLANGE法兰LC LOCKED CLOSED锁定关闭LO LOCKED OPEN锁定打开NC NORMALLY CLOSED正常情况下关闭NNF NORMALLY NO FLOW正常情况下无流量NO NORMALLY OPEN正常情况下打开S SAMPLE CONNECTION取样点SC SAMPLE CONNECTION WITH COOLER连接冷却器的取样点SOR START OF RUN开始运行SR STRAINER过滤器SS SAFETY SHOWER安全喷淋T LINE DRIP TRAP疏水器TSO TIGHT SHUT OFF密闭切断UC UTILITY CONNECTION公用工程接口LINESMAIN LINE主线SECONDARY LINE副线UNDERGROUND OR BURY地下或隐藏ELECTRICALLY TRACED电缆线SPECIAL TRACED特殊管线STEAM TRACED蒸汽伴热JACKETED夹套PACKAGED EQUIP BOUNDARY成套设备分界线BATTERY LIMIT BOUNDARY界区分界线FUTURE未来MATERIAL SPEC BREAK材料规格分界点DESIGN BREAK设计分界点BELOW GROUND LINE RISING ABOVE GRADE 地管伸出点BREAK OF REPONSIBILITY责任分界点MISCELLANEOUS ITEMS各种细节ROD OUT CONNECTIONCLEAN OUT CONNECTION (FLUSHING)清理接口（冲洗）REMOVABLE SPOOL可拆除短管NOZZLE OR PIPE WITH BLIND FLANGE 带盲法兰的喷嘴或管线SPACER FOR BLIND盲管位置NORMALLY CLOSED正常情况下关闭NORMALLY OPEN正常情况下打开FIGURE BB 图REVERSIBLE BLIND8字盲板ORIFICE SWAGE孔板INSULATED FLANGED JOINT保温法兰连接PIPE CAP (WELDED)管帽（焊接）PIPE CAP (SCREWED)管帽（法兰）REDUCER变径管T-STRAINERT型过滤器PERMANENT Y-STRAINER (WITH VALVE) 带阀门Y型过滤器TEMPORARY STRAINER临时过滤器HOSE CONNECTIONSAMPLE CONNECTION取样口**-SERVICE SYMBOL符号说明SEQUENCE NUMBER序列号OPEN DRAIN HUB敞口集液器MATERIAL BALANCE STREAM NUMBER 物流号CONTINUTY ARROW延续箭头INITIAL FEED初始进料GRADE等级TRENCH地沟LINE IDENTIFICATION管线说明INSULATION CODE保温代码MATERIAL SPECIFICATION材质BRANCH IDENTIFIER分支标识SEQUENCE NUMBERPROCESS SECTION AREA(MAY BE SINGLE DIGIT) 工艺区LINE SERVICE SYMBOL管线符号说明LINE SIZE管线尺寸VALVESGATE VALVE闸阀BUTTERFLY VALVE蝶阀DIAPHRAGM VALVE隔膜阀GLOBE VALVE球阀NEEDLE VALVE针型阀PLUG VALVE截止阀BALL VALVE球阀CHECK VALVE止逆阀STOP CHECK VALVE(BOILER NON-RETURN VALVE) 带手轮止逆阀THREE 0R FOUR VALVE三通或四通阀MULTI PORT PLUG多向切断阀ANGLE VALVE角阀DUAL TANDEM BLOWNDOWN VALVES两段排污阀RAN TYPE VALVER型阀T-TYPE GLOBE VALVET型球阀AUTOMATIC RECIRCULATION VALVE自动再循环阀INTERLOCKED VALVES(MECHANICAL LINK))机械联动阀QUICK OPENING OR CLOSING VALVE快速开关阀VALVE WITH BODY CAVITY RELIEF OR BODY BLEED CONNECTION 带有排放阀的阀门DAMPER挡板APPROPRIATE ABBREVIATION合适的缩写SLIDE GATE VALVE滑动闸阀EQUIPMENT IDENTIFACATION设备符号SUPPLIED WITH VENDOR EQUIPMENT供应商提供的设备SPARE(A,B,C,ETC USED IF PARALLEL UNITS)同一设备的编号SEQUENCE NUMBER序列号AREA NUMBER区号EQUIPMENT CODE OF ACCOUNT设备代码UNIT DESIGNATION单元名称E – ETHYLENE乙烯H - DPG HYDROGENATION汽油加氢U - UTILITY & OFF SITE公用工程PIPING SPECIALTY ITEMS ANDMISCELLANEOUS EQUIPMENT特殊管项和各种设备ALL PIPING SPECIALTY ITEMS ARE IDENTIFIED所有特殊管线有以下注明SEQUENCE NUMBER ( NUMBERED IN SAME WAY AS INSTRUMENT ) 序列号（与仪表排序相同）EXHAUST HEAD负呀总管ATOMPHERIC VENT WITH WEATHER CAP防雨放空管DUPLEX STRAINER相同的过滤器PERMANENT BASKET STRAINER提篮式过滤器FLEXIBLE HOSE金属软管EXPANSION JOINT膨胀节INLINE MIXERS OR VENTURI TYPE DESUPER HEATER 内嵌式混合器或文丘里型混合器SILENCER消音器EJECTOR OR EDUCTOR喷射器FILTER过滤器FILTER WITH HOOD带罩过滤器CONDENSATE TRAP (NON-PROCESS)凝液疏水器FIRE PROTECTION消防FIRE HYDRANT消防炮FIRE HYDRANT WITH MONITOR带监视器的消防栓FIRE HYDRANT WITH PUPPER CONNECTION消防栓HOSE HOUSE消防箱VALVE WITH INDICATOR POST 带指示的阀MONITOR监视器EM IF ELEVATEDPUMP泵CENTRIFUGAL离心泵METERING OR RECIPROCATING 计量泵或往复式泵ROTARY {GEAR ,SCREW }齿轮泵VERTICAL SUMP PUMP立式污水泵VERTICAL CANNEDPUMP (PFD ONLY ALL TYPES) 泵LIQUID RING VACUUM PUMP 水环式真空泵COMPRESSOR压缩机SINGLE STAGE RECIPROCATINGMULTI-STAGE RECIPROCATINGCENTRIFUGAL离心式ROTARY旋转式BLOWER FAN鼓风机BLOWER (PFD ONLY ALL TYPES) 鼓风机COMPRESSOR (PFD ONLY)压缩机SCREW螺杆式DRIVER驱动装置ELECTRIC MOTOR电动马达DIESEL ENGINE .ETC柴油发动机APPROPRIATE ABBREVIATION相应的缩写A AIR空气D DIESEL柴油H HYDRAULIC水力的M ELECTRIC电气的STEAM TURBINE蒸汽涡轮EXPANDER扩大室HEAT EXCHANGER换热器SHELL AND TUBE HEAT EXCHANGER管壳式换热器HORIZONTAL SHELL AND TUBE HEAT EXCHANGER 水平式管壳式换热器VERTICAL SHELL AND TUBE HEAT EXCHANGER 垂直式管壳式换热器SINGEL SECTION DOUBLE PIPE EXCHANGER TWO SECTION DOUBLE PIPE EXCHANGERAIR COOLER空冷器AIR COOLER (PFD ONLY)空冷器KETTLE TYPE REBOILER OR STEAM GENERATOR KETTLE TYPE EXCHANGER (PFD ONLY) GRAPHITE BLOCK TYPE EXCHANGERPLATE EXCHANGERDRAWING IDENTIFICATION图形说明REVISION NO.修订号DRAWING NO.图号AREA NO.区号JOB NO.工号DRAWING SIZEVESSELS AND FURNACES容器和炉子FLOATING ROOF TANK浮顶罐CONE ROOF TANK WITH INTERNAL COIL 带内盘管锥型顶罐COLUMN柱型PACKINGINTERNAL BAFFLEVORTEX BREAKER旋风分离器CABIN TYPE HEATER WITH EXTERNAL CROSS-OVERSHORIZONAL TYPE HEATER WITH INTERNAL CROSSOVERS 内部有交叉的水平加热管VESSEL ELEVATIONS离地面高度INSULATION CODE保温代码D ANTI-SWEAT INSULATION防水保温E ELECTRICAL TRACINGF FULL HEAT CONSERVATIONH NORMAL HEAT CONSERVATION一般保温M DUAL SERVICE INSULATIONP PERSONNEL PROTECTION防护人员S SPECIAL特殊的T STEAM TRACINGV ACOUSTICAL听力的BREAK OF RESPONSIBILITYSYMBOL FOR LOCATION OF TIE-IN POINT CONNECTEDU NEW ETHYLENE STORAGE AREA乙烯新区的V OSBL (ON NORTH SIDE RACK)W OSBL (ON MAIN RACK IN FRONT OF NEW HEATER)X OSBL (ON SOUTH SIDE RACK)Y OSBL (COOLING WATER)E EXISTING AREAD DPG AREAC4 C4 HYDRO AREAD(W) DPG AREA AND THROUGH THE TIE-IN POINT(W) ON THE RACKC4(U) C4 HYDRO AREA AND THROUGH THE TIE-IN POINT(U) ON THE RACKE(W) EXISTING AREA AND THROUGH TIE-IN POINT(W) ON THE RACKE(X) EXISTING AREA AND THROUGH TIE-IN POINT(X) ON THE RACK GENERAL NOTES1. FOR INSTRUMENTATION SYMBOLS SEE DWG NO.0005B仪表符号参阅图DWG NO.0005B2. FLOW DIAGRAMS ARE DIAGRAMATIC ONLY 。

PID常用图例符号PID（Process & Instrumentation Diagram）是一种用于表示工业过程中的管道线路、设备和仪表的示意图。

在PID图中，常常使用一些特定的符号来表示不同的元件和设备。

本文将介绍PID常用图例符号，并解释其含义。

1. 管道符号：- 直线段表示直线管道；- 弯曲线表示弯曲的管道；- 双线段表示双重管道，通常用于高压系统；- 箭头表示流向。

2. 过程设备符号：- 圆形代表压力容器，如储罐或反应器；- 正方形代表加热设备，如加热炉或锅炉；- 水平线代表换热器，用于传递热量；- 垂直线代表塔，用于分离混合物；- 棒状代表过滤器，用于过滤固体颗粒。

3. 仪表符号：- 圆圈代表传感器或探测器；- 正方形代表仪表，如温度计或压力计；- 倒三角形代表控制器，如调节阀或电机。

4. 操作符号：- 正方形代表手动操作，由人工完成；- 圆圈代表自动操作，由自动化控制系统完成。

5. 电气符号：- 直线代表电线或电缆；- 圆圈代表连接点或节点；- 箭头代表电流的流动方向。

通过使用这些常见的PID图例符号，工程师可以快速准确地理解和分析一个工业过程的流程和元件。

PID图的清晰和准确性对于工程设计和操作非常重要，因此保持符号的一致和正确使用是至关重要的。

需要注意的是，PID符号也可以根据具体的工程需求进行个性化的修改和扩展。

不同行业和不同的工艺过程可能会使用自定义的符号，以满足特定的要求。

总结：本文介绍了PID常用图例符号，包括管道符号、过程设备符号、仪表符号、操作符号和电气符号。

通过正确使用这些符号，工程师可以轻松理解和分析工业过程的流程和元件。

符号的使用保持一致性和准确性对于工程设计和操作至关重要。

希望本文对读者在理解和应用PID图方面有所帮助。

LINE SERVICE IDENTIFICATIONSYMBOL SERVICE符号帮助AIR SYSTEMS空气系统IA INSTRUMENT AIR仪表风PA PLANT AIR工厂风DA 烧焦空气STEAM AND CONDENSATE SYSTEMS蒸汽和凝液系统HC HIGH PRESSURE CONDENSATE高压蒸汽凝液MC MEDIUM PRESSURE CONDENSATE中压蒸汽凝液LC LOW PRESSURE CONDENSATE低压蒸汽凝液SC SURFACE CONDENSATE表面凝液DS DILUTION STEAM稀释蒸汽HS HIGH PRESSURE STEAM高压蒸汽MS MEDIUM PRESSURE STEAM中压蒸汽LS SUPERHEATED LOW PRESSURE STEAM过热低压蒸汽PS SATURATED LOW PRESSURE STEAM饱和低压蒸汽SHS SUPER HIGH PRESSURE STEAM超高压蒸汽DRAIN SYSTEMS排放系统CD CHEMICAL DRAIN化污LD LIQUID DRAIN液体排放ND NON-CONTAMINATED POLLUTION DRAIN无污染排放OD OILY DRAIN油污EXHAUST AND VENT SYSTEMSAV ATMOSPHERIC VENT (NOT FROM PSV) 通大气（不从安全阀）SV SAFETY VALVE TO ATMOSPHERE安全伐排大气FLARE SYSTEMS火炬系统DF DRY FLARE干火炬WF WET FLARE湿火炬GAS SYSTEMS气体系统FG FUEL GAS燃料气HG HYDROGEN氢气NG NITROGEN氮气SPECIAL LIQUID SYSTEMS特殊液体系统CL CAUSTIC腐蚀性QO QUENCH OIL急冷油SO SEAL OIL密封油WO WASHING OIL冲洗油（压缩机）PROCESS SERVICE (NORMAL)P PROCESS工艺REFRIGERANT SYSTEMSBR BINARY REFRIGERANT二元制冷PR PROPYLENE REFRIGERANT丙烯冷剂WATER SYSTEMS水系统BFW BOILER FEED WATER锅炉给水FW FIRE WATER消防水IW INTERMEDIATE WATER二次水CWR COOLING WATER RETURN冷却水回水CWS COOLING WATER SUPPLY冷却水PW POLISHED WATER工艺水QW QUENCH WATER急冷水UW UTILITY WATER工业水WW WASTE WATER废水MISCELLANEOUS ABBREVIATION AND SERVICE SYMBOLS 各种缩写和符号A AIR MOTOR空气马达ACC ACCESSIBLE可接近的ATM ATMOSPHERE大气BL BATTERY LIMIT界区BTS BUBBLE TIGHT SHUT-OFF缓慢紧密切断BV BY VENDOR由供应商提供CONN CONNECTION连接CSC CAR SEAL CLOSED关闭锁定CSO CAR SEAL OPEN打开锁定DEC DETAIL ENGINEERING CONTRACTOR工程承包商详细资料EOR END OF RUN运行结束SOREW EYEWASH洗眼FLG FLANGE法兰LC LOCKED CLOSED锁定关闭LO LOCKED OPEN锁定打开NC NORMALLY CLOSED正常情况下关闭NNF NORMALLY NO FLOW正常情况下无流量NO NORMALLY OPEN正常情况下打开S SAMPLE CONNECTION取样点SC SAMPLE CONNECTION WITH COOLER连接冷却器的取样点SOR START OF RUN开始运行SR STRAINER过滤器SS SAFETY SHOWER安全喷淋T LINE DRIP TRAP疏水器TSO TIGHT SHUT OFF密闭切断UC UTILITY CONNECTION公用工程接口LINESMAIN LINE主线SECONDARY LINE副线UNDERGROUND OR BURY地下或隐藏ELECTRICALLY TRACED电缆线SPECIAL TRACED特殊管线STEAM TRACED蒸汽伴热JACKETED夹套PACKAGED EQUIP BOUNDARY成套设备分界线BATTERY LIMIT BOUNDARY界区分界线FUTURE未来MATERIAL SPEC BREAK材料规格分界点DESIGN BREAK设计分界点BELOW GROUND LINE RISING ABOVE GRADE 地管伸出点BREAK OF REPONSIBILITY责任分界点MISCELLANEOUS ITEMS各种细节ROD OUT CONNECTIONCLEAN OUT CONNECTION (FLUSHING)清理接口（冲洗）REMOVABLE SPOOL可拆除短管NOZZLE OR PIPE WITH BLIND FLANGE 带盲法兰的喷嘴或管线SPACER FOR BLIND盲管位置NORMALLY CLOSED正常情况下关闭NORMALLY OPEN正常情况下打开FIGURE BB 图REVERSIBLE BLIND8字盲板ORIFICE SWAGE孔板INSULATED FLANGED JOINT保温法兰连接PIPE CAP (WELDED)管帽（焊接）PIPE CAP (SCREWED)管帽（法兰）REDUCER变径管T-STRAINERT型过滤器PERMANENT Y-STRAINER (WITH VALVE) 带阀门Y型过滤器TEMPORARY STRAINER临时过滤器HOSE CONNECTIONSAMPLE CONNECTION取样口**-SERVICE SYMBOL符号说明SEQUENCE NUMBER序列号OPEN DRAIN HUB敞口集液器MATERIAL BALANCE STREAM NUMBER 物流号CONTINUTY ARROW延续箭头INITIAL FEED初始进料GRADE等级TRENCH地沟LINE IDENTIFICATION管线说明INSULATION CODE保温代码MATERIAL SPECIFICATION材质BRANCH IDENTIFIER分支标识SEQUENCE NUMBERPROCESS SECTION AREA(MAY BE SINGLE DIGIT) 工艺区LINE SERVICE SYMBOL管线符号说明LINE SIZE管线尺寸VALVESGATE VALVE闸阀BUTTERFLY VALVE蝶阀DIAPHRAGM VALVE隔膜阀GLOBE VALVE球阀NEEDLE VALVE针型阀PLUG VALVE截止阀BALL VALVE球阀CHECK VALVE止逆阀STOP CHECK VALVE(BOILER NON-RETURN VALVE) 带手轮止逆阀THREE 0R FOUR VALVE三通或四通阀MULTI PORT PLUG多向切断阀ANGLE VALVE角阀DUAL TANDEM BLOWNDOWN VALVES两段排污阀RAN TYPE VALVER型阀T-TYPE GLOBE VALVET型球阀AUTOMATIC RECIRCULATION VALVE自动再循环阀INTERLOCKED VALVES(MECHANICAL LINK))机械联动阀QUICK OPENING OR CLOSING VALVE快速开关阀VALVE WITH BODY CAVITY RELIEF OR BODY BLEED CONNECTION 带有排放阀的阀门DAMPER挡板APPROPRIATE ABBREVIATION合适的缩写SLIDE GATE VALVE滑动闸阀EQUIPMENT IDENTIFACATION设备符号SUPPLIED WITH VENDOR EQUIPMENT供应商提供的设备SPARE(A,B,C,ETC USED IF PARALLEL UNITS)同一设备的编号SEQUENCE NUMBER序列号AREA NUMBER区号EQUIPMENT CODE OF ACCOUNT设备代码UNIT DESIGNATION单元名称E – ETHYLENE乙烯H - DPG HYDROGENATION汽油加氢U - UTILITY & OFF SITE公用工程PIPING SPECIALTY ITEMS ANDMISCELLANEOUS EQUIPMENT特殊管项和各种设备ALL PIPING SPECIALTY ITEMS ARE IDENTIFIED所有特殊管线有以下注明SEQUENCE NUMBER ( NUMBERED IN SAME WAY AS INSTRUMENT ) 序列号（与仪表排序相同）EXHAUST HEAD负呀总管ATOMPHERIC VENT WITH WEATHER CAP防雨放空管DUPLEX STRAINER相同的过滤器PERMANENT BASKET STRAINER提篮式过滤器FLEXIBLE HOSE金属软管EXPANSION JOINT膨胀节INLINE MIXERS OR VENTURI TYPE DESUPER HEATER 内嵌式混合器或文丘里型混合器SILENCER消音器EJECTOR OR EDUCTOR喷射器FILTER过滤器FILTER WITH HOOD带罩过滤器CONDENSATE TRAP (NON-PROCESS)凝液疏水器FIRE PROTECTION消防FIRE HYDRANT消防炮FIRE HYDRANT WITH MONITOR带监视器的消防栓FIRE HYDRANT WITH PUPPER CONNECTION消防栓HOSE HOUSE消防箱VALVE WITH INDICATOR POST 带指示的阀MONITOR监视器EM IF ELEVATEDPUMP泵CENTRIFUGAL离心泵METERING OR RECIPROCATING 计量泵或往复式泵ROTARY {GEAR ,SCREW }齿轮泵VERTICAL SUMP PUMP立式污水泵VERTICAL CANNEDPUMP (PFD ONLY ALL TYPES) 泵LIQUID RING VACUUM PUMP 水环式真空泵COMPRESSOR压缩机SINGLE STAGE RECIPROCATINGMULTI-STAGE RECIPROCATINGCENTRIFUGAL离心式ROTARY旋转式BLOWER FAN鼓风机BLOWER (PFD ONLY ALL TYPES) 鼓风机COMPRESSOR (PFD ONLY)压缩机SCREW螺杆式DRIVER驱动装置ELECTRIC MOTOR电动马达DIESEL ENGINE .ETC柴油发动机APPROPRIATE ABBREVIATION相应的缩写A AIR空气D DIESEL柴油H HYDRAULIC水力的M ELECTRIC电气的STEAM TURBINE蒸汽涡轮EXPANDER扩大室HEAT EXCHANGER换热器SHELL AND TUBE HEAT EXCHANGER管壳式换热器HORIZONTAL SHELL AND TUBE HEAT EXCHANGER 水平式管壳式换热器VERTICAL SHELL AND TUBE HEAT EXCHANGER 垂直式管壳式换热器SINGEL SECTION DOUBLE PIPE EXCHANGER TWO SECTION DOUBLE PIPE EXCHANGERAIR COOLER空冷器AIR COOLER (PFD ONLY)空冷器KETTLE TYPE REBOILER OR STEAM GENERATOR KETTLE TYPE EXCHANGER (PFD ONLY) GRAPHITE BLOCK TYPE EXCHANGERPLATE EXCHANGERDRAWING IDENTIFICATION图形说明REVISION NO.修订号DRAWING NO.图号AREA NO.区号JOB NO.工号DRAWING SIZEVESSELS AND FURNACES容器和炉子FLOATING ROOF TANK浮顶罐CONE ROOF TANK WITH INTERNAL COIL 带内盘管锥型顶罐COLUMN柱型PACKINGINTERNAL BAFFLEVORTEX BREAKER旋风分离器CABIN TYPE HEATER WITH EXTERNAL CROSS-OVERSHORIZONAL TYPE HEATER WITH INTERNAL CROSSOVERS 内部有交叉的水平加热管VESSEL ELEVATIONS离地面高度INSULATION CODE保温代码D ANTI-SWEAT INSULATION防水保温E ELECTRICAL TRACINGF FULL HEAT CONSERVATIONH NORMAL HEAT CONSERVATION一般保温M DUAL SERVICE INSULATIONP PERSONNEL PROTECTION防护人员S SPECIAL特殊的T STEAM TRACINGV ACOUSTICAL听力的BREAK OF RESPONSIBILITYSYMBOL FOR LOCATION OF TIE-IN POINT CONNECTEDU NEW ETHYLENE STORAGE AREA乙烯新区的V OSBL (ON NORTH SIDE RACK)W OSBL (ON MAIN RACK IN FRONT OF NEW HEATER)X OSBL (ON SOUTH SIDE RACK)Y OSBL (COOLING WATER)E EXISTING AREAD DPG AREAC4 C4 HYDRO AREAD(W) DPG AREA AND THROUGH THE TIE-IN POINT(W) ON THE RACKC4(U) C4 HYDRO AREA AND THROUGH THE TIE-IN POINT(U) ON THE RACKE(W) EXISTING AREA AND THROUGH TIE-IN POINT(W) ON THE RACKE(X) EXISTING AREA AND THROUGH TIE-IN POINT(X) ON THE RACK GENERAL NOTES1. FOR INSTRUMENTATION SYMBOLS SEE DWG NO.0005B仪表符号参阅图DWG NO.0005B2. FLOW DIAGRAMS ARE DIAGRAMATIC ONLY 。