为方便仪表工在查阅P&ID图时正确识别P&ID图中的管线符号、仪表符号及图例，昌晖仪表整理了P&ID图例及符号中英文对照供大家使用，希望对你有所帮助。

1、LINE SYMBOLS AND LEGEND管线符号及图例


PIPE LINE工艺物料管线及公用工程物料管线


JACKETED PIPE LINE带夹套管线


PIPE LINE (UNDER GROUND-BURIED)埋地管线


STEAM TRACED OR ELECTRIC TRACED PIPE LINE蒸汽伴热或电伴热管线


SLOPED PIPE LINE坡度管线


FLOW DIRECTION物料流向


CONNECTED BRANCH管线分支(连接管线)


NON-CONNECTED管线断线(不连接)


CONTINUATION OF PIPE LINE管线断线(不连接)
BEYOND THE PIPE OR EQUIPMENT


CONTINUATION OF THE PIPE LINE
BETWEEN SEPARATE
P&ID DRAWNGS管线图纸接续标志


BATTERY LIMITS OF PLANT装置界区线


EQUIPMENT LINE设备及机械线


BOUNDARY OF SCOPE(VENDOR)供货商范围


REDUCER异径管


SPECIAL REDUCER特殊异径管


FLANGED CONNECTION法兰连接


FLANGED SPOOL PIECE法兰连接短管


SPECIAL SPOOL PIECE特殊短节


ENDED WITH BLIND FLANGE盲板


ENDED WITH WELDED CAP管帽


ENDED WITH PLUG阀端带丝堵


HOSE CONNECTION软管接头


SPRAY NOZZLE喷头


HOLED PIPE SPRAY HEADER喷淋管线


CHANGE OF PIPING CLASS DESIGNATION(CLASS BREAK)管线等级分界


SEWER漏斗


GROUND OR PAVING SURFACE地面


CHEMICAL CHARGE(MANUAL)物料加入(手工)


SUCTION FILTER吸入过滤器


SIGHT GLASS安装于设备上视镜(DIRECTLY MOUNTED ON EQUIPMENT)


GATE VALVE(NORMALLY OPEN) 闸阀(开)


GATE VALVE(NORMALLY CLOSE)闸阀(关)


GLOBE VALVE(NORMALLY OPEN)截止阀(开)


GLOBE VALVE(NORMALLY CLOSE)截止阀(关)


BALL VALVE(NORMALLY OPEN)球阀(开)


BALL VALVE(NORMALLY CLOSE)球阀(关)


BUTTERFLY VALVE蝶阀


NEEDLE VALVE针形阀


CHECK VALVE止回阀


DAMPER调节风门

SAFETY VALVE OR REUIEF VALVE安全阀


RUPTURE DISC爆破片


BREATHER VALVE呼吸阀


3-WAY VALVE三通阀


FOOT VALVE底阀


CAR SEALED CLOSE VALVE铅封阀(关)


CAR SEALED OPEN VALVE铅封阀(开)


STRAINER(T-TYPE)T型过滤器


STRAINER(Y-TYPE)Y型过滤器

TEMPORARY STRAINER临时过滤器


QUICK COUPLING(MALE)快速接头(外螺纹)


QUICK COUPLING(FEMALE)快速接头(内螺纹)


SPACER AND BLANKS盲板
NORMAL OPEN
NORMAL CLOSE


SPECTACLE BLIND 8字盲板
NORMAL OPEN
NORMAL CLOSE


SIGHT GLASS管道视镜


DRAIN TRAP排污或空气疏水器

STEAM TRAP蒸汽疏水器


FLAME ARRESTER阻火器


SILENCER(IN-LINE TYPE)在线消音器


EXPANSION BELLOWS波纹管，软连接或膨胀节


SAMPLING CONNECTION取样点


STATIC MIXER静态混合器


CONTROL VALVE(SELF ACTUATED)自力式调节阀


CONTROL VALVE BODY(GLOBE TYPE)控制阀(截止阀)

CONTROL VALVE BODY(BUTTERFLY TYPE)控制阀(蝶阀)


CONTROL VALVE BODY(BALL TYPE)控制阀(球阀)


RESTRICTION ORIFICE限流孔板


ROTARY FEEDER旋转加料器


DIVERTER VALVE换向阀


SLIDE GATE VALVE／KNIFE GATE VALVE滑板阀


FEEDING SHOE在线喷射器(加料室)

BLOWER罗茨风机


COMPRESSOR压缩机


HEAT EXCHANGER换热器


IN-LINE FILTER(GUARD FILTER)在线过滤器

CENTRIFUGAL FAN风扇(离心风机)


CENTRIFUGAL PUMP离心泵

2、FLUID物料代号
P：PROCESS 工艺物料(包括聚合物)
V：VENT OR FLARE 排气、排空成火炬气
LS：LOW PRESSURE STEAM 低压蒸汽
MS：MEDIUM PRESSURE STEAM中压蒸汽
HS：MEDIUM PRESSURE STEAM高压蒸汽
SC：STEAM CONDENSATE 蒸汽凝液
CWS：COOLING WATER SUPPLY 冷却水供水
CWR：COOLING WATER RETURN 冷却水回水
HWS：HOT WATER SUPPLY 热水供水
HWR：HOT WATER RETURN热水回水
DW：DEMINERALIZED WATER脱盐水
PW：FRESH WATER 新鲜水，工艺水
FW：FIRE FIGHTING WATER 消防水
PA：PLANT AIR 工厂空气
IA：INSTRUMENT AIR仪表空气
N：NITROGEN,PURGE NITROGEN氮气，冲洗氮气
Nd：PROCESS NITROGEN 工艺氮气，输送氮气
A：CONVEYING AIR,PURGE AIR输送空气，冲洗空气
W：WASH WATER冲洗水
WW：WASTE WATER废水

3、EQUIPMENT ABBREVIATIONS设备代号
TK：SILO，BIN 料仓 
E：COOLER,HEAT EXCHANGER冷却器、换热器类
R：REACTOR反应器类
K：TANK槽，罐类
P：PUMP泵类
C：BLOWER,COMPRESSOR,FAN压缩机，鼓风机类
RF：ROTARY VALVE旋转阀
HV：DIVERTER VALVE换向阀
SV：SLIDE VALVE滑板阀 
F：GUARD FILTER,BAG FILTER过滤器
Y：ELUTRIATOR,CYCLONE淘洗器，旋风分离器
MP：FEEDING SHOE在线喷射器(加料室)
X：OTHER EQUIPMENT其它设备

4、EQUIPMENT NUMBERING设备位号
举例：C-8001A/B/C......
[C]：EQUIPMENT CLASSIFICATION设备类型代号
[80]：UNIT IDENTIFICATION单元号
[01]：EQUIPMENT NUMBER设备顺序号
[A/B/C]：INDICATES SPARED/PARALLEL DUTY并联及备用

5、INSULATION LEGEND保温代号
HC：HEAT CONSERVATION INSULATION保温
ST：STEAM TRACING INSULATION蒸汽伴热
HWT：HOT WATER TRACING INSULATION热水伴热
ET：ELECTRIC TRACING INSULATION电伴热
C：REFRIGERATION INSULATION保冷
PP：PERSONNEL PROTECTION INSULATION人身防护
NC：mACOUSTIC INSULATION隔音


H：HEAT CONSERVATION INSULATION保温
C：REFRIGERATION INSULATION保冷
P：PERSONNEL PROTECTION人身防护
N：ACOUSTIC INSULATION隔音
E：ELECTRIC TRACING INSULATION电伴热

6、GENERAL NOTE说明
①SAFETY RELIEF DEVICE COMMENTS:
DISCHARGE PIPING FROM SAFETY RELIEF DEVICE SHALL BE DESIGNED TO WITHSTAND FORCES CREATED DURING DISCHARGE.
ROUTE DISCHARGE LINE TO A SAFE LOCATION.FOR LINES DIRECTED UPWARD TO THE ATMOSPHERE,DISCHARGE 3.5 METERS MINIMUM ABOVE NEAREST OPERATING LEVEL,AND PROVIDED A 9.5 mm WEEP HOLE AT THE LOW POINT.
THE USE OF REDUCED PORT VALVES ON THE INLET SIDE OF SAFETY RELIEF DEVICE IS TO BE AVOIDED.FULL PORT VALVES ARE RECOMMENDED.
VALVES IN THE INLET AND OUTLET PIPING TO BE CAR SEALED OPEN(CSO) UNLESS OTHERWISE NOTED.
安全泄放阀建议：
安全泄放阀，出口管要考虑泄放时产生的推力。
出口管垂直向上排放至安全位置，排放口高度至少距最近操作平台3.5m以上。管子低点开9.5mm泪孔。
安全泄放阀入口端避免使用缩径阀，建议使用全通径阀。
安全阀进出口阀应铅封开，除非另有说明。

 ②UNLESS OTHERWISE NOTED,THE FOLLOWING COMMENTS APPLY TO ALL VENTS AND DRAINS:
VALVES ARE TO FOLLOW THE ASSOCIATED PIPING OR EQUIPMENT VALVE AND PIPING SPECIFICATION.OPEN END VALVES ASSOCIATED WITH PIPING ARE TO BE 3/4”OR LINE SIZE,WHICHEVER IS SMALLER.OPEN END VALVES ASSOCIATED WITH EQUIPMENT ARE TO BE NOZZLE SIZE.OPEN END VALVES ARE TO BE EQUIPPED WITH PLUGS OR BLIND FLANGES THAT ARE CHAINED TO THEVALVE BODY.
除非说明，下列建议适用于所有放空或导净阀：放空阀和导净阀的等级应与主管道或设备一致，阀门的尺寸为3/4”或者等于管线尺寸，取其小者，与设备相接的阀门与管接口尺寸一致，阀门要装上丝堵或者法兰盖。

③UNLESS OTHERWISE NOTED,ALL PROCESS VALVES USED AS INSTRUMENT TAKEOFFS FROM.PIPING,DESIGNATED AS GV OR BV,SHOULD BE:
-1/2"IF THE PROCESS LINE IS.1/2”
-3/4"IF THE PROCESS LINE IS 3/4”OR GREATER
除非说明，所有仪表从工艺管引出，切断阀使用闸阀或球阀：
1/2”：工艺管1/2”
3/4”：工艺管≥3/4

7、INSTRUMENTATION仪表图例符号
P&ID图中的仪表图例及符号是仪表工应知应会知识，为此昌晖仪表在文章《轻松看懂P&ID图中的仪表图例符号》专门介绍。
 
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