LINE SERVICE IDENTIFICATION
SYMBOL 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 SREAM 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
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无污染排放 OD OILY DRAIN
油污
EXHAUST AND VENT SYSTEMS
AV 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 SYSTEMS
BR BINARY REFRIGERANT 二元制冷
PR PROPYLENE REFRIGERANT
2
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 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
AND SERVICE 3
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 SOR
EW 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 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
WITH COOLER 4
LINES
MAIN 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 CONNECTION
CLEAN 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
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NORMALLY CLOSED 正常情况下关闭
NORMALLY OPEN 正常情况下打开 FIGURE B B 图
REVERSIBLE BLIND 8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-STRAINER T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 CONNECTION 软管接口
SAMPLE 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
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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 NUMBER 管线号
PROCESS SECTION AREA(MAY BE SINGLE DIGIT) 工艺区
LINE SERVICE SYMBOL 管线符号说明 LINE SIZE 管线尺寸
VALVES
GATE 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
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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 VALVE R型阀
T-TYPE GLOBE VALVE T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 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
CONNECTION 8
乙烯
H - DPG HYDROGENATION 汽油加氢
U - UTILITY & OFF SITE
公用工程
PIPING SPECIALTY ITEMS AND MISCELLANEOUS 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
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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 ELEVATED
PUMP 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 CANNED
PUMP (PFD ONLY ALL TYPES) 泵
LIQUID RING VACUUM PUMP 水环式真空泵
COMPRESSOR 压缩机
SINGLE STAGE RECIPROCATING
MULTI-STAGE RECIPROCATING
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CENTRIFUGAL 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
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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 EXCHANGER
AIR 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 EXCHANGER
DRAWING IDENTIFICATION 图形说明
REVISION NO. 修订号
DRAWING NO. 图号
AREA NO. 区号
JOB NO. 工号
DRAWING SIZE
VESSELS AND FURNACES 容器和炉子
FLOATING ROOF TANK 浮顶罐
CONE ROOF TANK WITH INTERNAL COIL
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带内盘管锥型顶罐 COLUMN 柱型
PACKING
INTERNAL BAFFLE
VORTEX BREAKER 旋风分离器
CABIN TYPE HEATER WITH EXTERNAL CROSS-OVERS
HORIZONAL 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 TRACING
F FULL HEAT CONSERVATION
H NORMAL HEAT CONSERVATION 一般保温
M DUAL SERVICE INSULATION
P PERSONNEL PROTECTION
防护人员
S SPECIAL 特殊的
T STEAM TRACING
V ACOUSTICAL 听力的
BREAK OF RESPONSIBILITY
SYMBOL FOR LOCATION OF TIE-IN POINT CONNECTED
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U 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 AREA
D DPG AREA
C4 C4 HYDRO AREA
D(W) DPG AREA AND THROUGH THE TIE-IN POINT(W) ON THE RACK
C4(U) C4 HYDRO AREA AND THROUGH THE TIE-IN POINT(U) ON THE RACK
E(W) EXISTING AREA AND THROUGH TIE-IN POINT(W) ON THE RACK
E(X) EXISTING AREA AND THROUGH TIE-IN POINT(X) ON THE RACK
GENERAL NOTES
1. FOR INSTRUMENTATION SYMBOLS SEE DWG NO.0005B 仪表符号参阅图DWG NO.0005B
2. FLOW DIAGRAMS ARE DIAGRAMATIC ONLY 。 ROUTING OF PIPELINES MUST BE INVESTIGATED FOR VENTING OF HIGH POINTS OF PIPING AND DRAINING OF LOW POINTS OF PIPING AND EQUIPMENT . THESE POINTS ARE NOT NORMALLY SHOWN ON P&I FLOW DIAGRAM
3. THE CONTROL VALVE ASSEMBLY WILL HAVE A 3/4＂ DRAIN VALVE LOCATED ON THE UPSTREAM SIDE OF THE CONTROL VALVE
在调节阀的上游应有一个3/4英寸的就地排放阀。 .
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4. VESSEL INTERNALS, FURNACE COILS , HEADERS, AND
MANIFOLDS ARE SHOWN TO THE EXTENT REQUIRED FOR CLARITY. 容器内部、炉管等在必要的地方标明。
5. ALLOWANCE IS TO BE MADE FOR TEMPORARY STRAINERS IN SUCTION LINES OF ALL PUMPS AND COMPRESSOR 1 1/2＂ AND LARGER . ＂Y＂TYPE STRAINERS ARE TO BE PROVIDED IN SUCTION LINES 1 1/2＂ AND SMALLER..
在所有泵、压缩机的吸入管线上均装有1 1/2＂或更大的临时过滤器，＂Y＂型过滤器则被装在1 1/2＂或更小的管线上。
6. ＇TO ATM AT SAFE LOCATION＇MEANS 3000mm ABOVE ANY
PLATFORM OR STAIRWAY WITHIN AN 8000mm RADIUS.
7. 9mm WEEP HOLE SHALL BE PROVIDED IN LOW POINTS OF
RELIEF VALVE DISCHARGES VENTING TO ATMOSPHERE. 在排大气阀的低点有一个9mm的孔来排出液体。
8. BATTERY LIMIT OR ROOT VALVES ARE NOT NECESSARILY SHOWN
ON PROCESS P&IDS. THESE SHOWN BE SHOWN AS REQUIRED ON DISTRIBUTION AND/OR UTILITY P&IDS DURING DETAILED DESIGN. 界区阀和根部阀在工艺流程图中不一定有，但在公用工程的P&IDS图中会有详细资料。
9. PUMP SEAL FLUSHES AND COOLING DETAILS TO BE PROVIDED
BY DETAILED ENGINEERING CONTRACTOR. FOR SPECIAL REQUIREMENTS, SEE PUMP DATA SHEETS OR SCHEDULES. 泵的密封和冷却系统由工程承包商提供，有特殊要求请查看泵的曲线和表。
10. ALL ELEVATIONS SHOWN ARE PRELIMINARY, ELEVATIONS ARE TO
BE FINALIZED DURING DETAILED ENGINEERING, TOWER AND DRUM ELEVATIONS ARE BASED ON REBOILER HYDRAULICS OR PUMP NPSH REQUIRENENTS.
11. BLOCK VALVES FOR ALL INSTRUMENTS SUCH AS
PLPGLI AND LG ARE NOT INDICATED AND THESE BLOCK VALVES
ARE 3/4＂, IF NOT INDICATED.
12. RUNNING SIGNALS FOR ALL MOTOR ARE NOT INDICATED. 所有的马达运行信号不被显示。
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LINE DESIGATIONS
CONNECTION TO PROCESS, MECHANICAL LINE OR INSTRUMENT INPUT
CAPILLARY TUBING (FILLED SYSTEM)
PNEUMATIC SIGNAL
ELECTRICAL SIGNAL OR
SOFTWARE SIGNAL
HYDRAULIC (LIQOID) SIGNAL
ELECTROMAGNETIC OR SONIC SIGNAL
(INCLUDING RADIO WAVES, NUCLEAR RADIATION,HEAT AND LIGHT)
INSTRUMENT AIR SUPPLY
INSTRUMENT LINE PURGE **-PURGE MEDIUM
(LINE SERVICE IDENTIFICATION OR AS NOTED)
TEMPERATURE INSTRUMENTS
SINGLE THERMOCOUPLE, RTD,
GAUGE OR WELL,
*** - RTD (IF RESISTANCE
TEMPERATURE DETECTOR)
DUPLEX THERMOCOUPLE IN ONE WELL
MULTI-ELEMENT THERMOCOUPLE FOR DIFFERENT ELEVATIONS OR ZONES
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(INDICATE FIRST AND LAST TAG
NUMBERS OR TAG NUMBER SUFFIXES)
TEMPERATURE REGULATOR 温度调节阀
PRESSURE INSTRUMENTS 压力调节器
CONTROLLING SIDE
PRESSURE REDUCING REGULATOR-SELF-CONTAINED
PRESSURE REGULATOR WITH EXTERNAL PRESSURE TAP
DEFFERENTIAL PRESSURE REDUCING WITH EXTERNAL AND PRESSURE TAPS
SAFETY RELIEF VALVE
PRESSURE AND VACUUM SAFETY
RELIEF VALVE
PILOT OPERATED SAFETY RELIEF VALVE
RELIEVING MANHOLE COVER
PRESSURE OR VACUUM RELIEF
SET PRESS 设定压力
PRESSURE RELIEF RUPTURE DISK
VACUUM RELIEF RUPTURE DISK
FLOW INSTRUMENTS 流量计
EXTERNAL 17
ORIFICE PLATE OR RESTRICTION ORIFICE 孔板或限流孔
ORIFICE PLATE IN QUICK CHANGE FITTING
VENTURL FLOW TUBE OR FLOW NOZZLE 文丘里流量计或喷嘴
INSERTION TYPE FLOW INSTRUMENT 插入型流量计 FLUME
WEIR
ROATMETER 转子流量计
FLOW STRAIGHTENING VANES
EXTERNAL TYPE FLOW INSTRUMENT SPECIFY TYPE
OUTSIDE BUBBLE
IN-LINE FLOW INSTRUMENT
SPECIFY TYPE
OUTSIDE BUBBLE
LEVEL INSTRUMENTS 液位计
EXTERNAL LEVEL INSTRUMENT 外部液位计（玻璃板、浮筒式）
INTERNAL FLOAT TYPE LEVEL INSTRUMENT 浮筒式液位计
BUBBLE TYPE LEVEL INSTRUMENT
RADIATION OR SONIC LEVEL INSTRUMENT
FLOAT AND TAPE TYPE LEVEL INDICATOR OR TRANSMITTER STORAGE TANKS
OTHER LEVEL INSTRUMENTS SPECIFY TYPE OUTSIDE BUBBLE
FOR 18
LEVEL REGULATOR WITH MECHANICAL LINKAGE
CONTROL VALVES
GLOBE VALVE 球阀 ANGLE 角阀
BUTTERFLY 蝶型
BALL. PLUG OR DISC 球、塞子、圆盘
DIAPHRAGM（SAUNDERS） 隔膜
OTHER （SPECIFY NEXT TO SYMBOL） 其他的（在下一个符号中详细说明） THREE WAY GLOBE 三通球型调节阀
FOUR WAY VALVE 四通调节阀
ACTUATORS
SPRING AND DIAPHRAGM 弹簧和隔膜
DIFFERENTIAL DIAPHRAGM 微分隔膜
PISTON TYPE - SINGLE ACTING
PISTON TYPE - DOUBLE ACTING
ELECTRIC MOTOR 电动马达 SOLENOID 螺线管
ELECTRO-HYDRAULIC
GAS MOTOR 气动马达
MANUAL HANDWHEEL 手轮
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ACCESSORIES
SIDE MOUNTED HANDWHEEL
MANUAL RESET
REMOTE RESET
ADDITIONAL INFORMATION
BODY SIDE 阀体尺寸
BTS BUBBLE TIGHT SHUT-OFF
TSO TIGHT SHUT-OFF
AIR FAILURE POSITION
FO FAIL OPEN 故障时打开 FC FAIL CLOSE 故障时关闭
FL(O) FAIL LOCKED(LAST POSITION) VALVE OPENS ON DECREASING CONTROL SIGNAL
FL(C)) FAIL LOCKED(LAST POSITION) VALVE CLOSES ON DECREASING CONTROL SIGNAL
SPLIT RANGE DESIGNATION
A FIRST VALVE TO RESPOND TO INCREASING CONTROL SIGNAL
B SECOND VALVE TO RESPOND TO INCREASING CONTROL SIGNAL
MISCELLANEOUS ITEMS 各种
INLINE INSTRUMENTS
20
在线仪表
FLAME ARRESTOR
CONTINUOUS DRAINER
OPTIONAL VENT LINE
EXCESS FLOW VALVE
PROCESS STEAM TRAP
ANALYZER
ANALYTICAL COMPONENT OR PHYSICAL PROPERTY
PURGING DETAIL
DIAPHRAGM SEALS
PIPED CONNECTION
FLUSH MOUNTED
TRACING
CONVENTIONAL INSTRUMENTATION
DIGITAL INSTRUMENTATION
PUSHBOTTON , SWITCHES & LIGHTS
INDICATING LIGHT
PUSHBOTTON
PUSHBOTTON WITH LIGHT
SWITCH
SWITCH WITH LIGHT(LIGHT INCLUDED FOR EACH FUNCTION)
HIGH/LOW OPEN/CLOSE
PUSHBUTTON 21
LIGHT DESIGNATION
MEASURED VARIABLE
FUNCTION
BYP BY PASS
HOA HAND/OFF//AUTOMATIC
O/C OPEN/CLOSE
RESET
S/S START/STOP
TRIP TRIP
NOTES
1. FOR PIPING AND EQUIPMENT SYMBOLS , SEE DWG 000054
2. THE INSTRUMENTATION REPRESENTATION ON P&I FLOW DIAGRAMS,
IN GENERAL , CONSISTS OF A SINGLE OR SEVERAL BALOONS SUFFICIENT FOR FUNCTIONAL DEFINATION, COMPLEX OR UNUASUAL LOOPS ARE DIPECTED WITH INDIVIDUAL COMPONENT BALOONS AS REQUIRED FOR CLARITY.
3. ALL CONTROL ROOM INSTRUMENTS ARE LOCATED IN THE CENTRAL CONTROL ROOM UNLESS OTHERWISE NOTES.
4. NEEDLE VALVE AND CHECK VALVE ARE INTEGRAL PART OF
ROTAMETER.
5. AN INSTRUMENT NUMBER WITH AN X SUFFIX OR AN X IN
PLACE OF THE LOOP NO. DENOTES THE INSTRUMENT IS FURNISHED AS PART OF AN EQUIPMENT PACKAGE.
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PID图例符号介绍
