為方便儀表工在查閱P&ID圖時正確識別P&ID圖中的管線符號、儀表符號及圖例，昌暉儀表整理了P&ID圖例及符號中英文對照供大家使用，希望對你有所幫助。

1、LINE SYMBOLS AND LEGEND管線符號及圖例


PIPE LINE工藝物料管線及公用工程物料管線


JACKETED PIPE LINE帶夾套管線


PIPE LINE (UNDER GROUND-BURIED)埋地管線


STEAM TRACED OR ELECTRIC TRACED PIPE LINE蒸汽伴熱或電伴熱管線


SLOPED PIPE LINE坡度管線


FLOW DIRECTION物料流向


CONNECTED BRANCH管線分支(連接管線)


NON-CONNECTED管線斷線(不連接)


CONTINUATION OF PIPE LINE管線斷線(不連接)
BEYOND THE PIPE OR EQUIPMENT


CONTINUATION OF THE PIPE LINE
BETWEEN SEPARATE
P&ID DRAWNGS管線圖紙接續標志


BATTERY LIMITS OF PLANT裝置界區線


EQUIPMENT LINE設備及機械線


BOUNDARY OF SCOPE(VENDOR)供貨商范圍


REDUCER異徑管


SPECIAL REDUCER特殊異徑管


FLANGED CONNECTION法蘭連接


FLANGED SPOOL PIECE法蘭連接短管


SPECIAL SPOOL PIECE特殊短節


ENDED WITH BLIND FLANGE盲板


ENDED WITH WELDED CAP管帽


ENDED WITH PLUG閥端帶絲堵


HOSE CONNECTION軟管接頭


SPRAY NOZZLE噴頭


HOLED PIPE SPRAY HEADER噴淋管線


CHANGE OF PIPING CLASS DESIGNATION(CLASS BREAK)管線等級分界


SEWER漏斗


GROUND OR PAVING SURFACE地面


CHEMICAL CHARGE(MANUAL)物料加入(手工)


SUCTION FILTER吸入過濾器


SIGHT GLASS安裝于設備上視鏡(DIRECTLY MOUNTED ON EQUIPMENT)


GATE VALVE(NORMALLY OPEN) 閘閥(開)


GATE VALVE(NORMALLY CLOSE)閘閥(關)


GLOBE VALVE(NORMALLY OPEN)截止閥(開)


GLOBE VALVE(NORMALLY CLOSE)截止閥(關)


BALL VALVE(NORMALLY OPEN)球閥(開)


BALL VALVE(NORMALLY CLOSE)球閥(關)


BUTTERFLY VALVE蝶閥


NEEDLE VALVE針形閥


CHECK VALVE止回閥


DAMPER調節風門

SAFETY VALVE OR REUIEF VALVE安全閥


RUPTURE DISC爆破片


BREATHER VALVE呼吸閥


3-WAY VALVE三通閥


FOOT VALVE底閥


CAR SEALED CLOSE VALVE鉛封閥(關)


CAR SEALED OPEN VALVE鉛封閥(開)


STRAINER(T-TYPE)T型過濾器


STRAINER(Y-TYPE)Y型過濾器

TEMPORARY STRAINER臨時過濾器


QUICK COUPLING(MALE)快速接頭(外螺紋)


QUICK COUPLING(FEMALE)快速接頭(內螺紋)


SPACER AND BLANKS盲板
NORMAL OPEN
NORMAL CLOSE


SPECTACLE BLIND 8字盲板
NORMAL OPEN
NORMAL CLOSE


SIGHT GLASS管道視鏡


DRAIN TRAP排污或空氣疏水器

STEAM TRAP蒸汽疏水器


FLAME ARRESTER阻火器


SILENCER(IN-LINE TYPE)在線消音器


EXPANSION BELLOWS波紋管，軟連接或膨脹節


SAMPLING CONNECTION取樣點


STATIC MIXER靜態混合器


CONTROL VALVE(SELF ACTUATED)自力式調節閥


CONTROL VALVE BODY(GLOBE TYPE)控制閥(截止閥)

CONTROL VALVE BODY(BUTTERFLY TYPE)控制閥(蝶閥)


CONTROL VALVE BODY(BALL TYPE)控制閥(球閥)


RESTRICTION ORIFICE限流孔板


ROTARY FEEDER旋轉加料器


DIVERTER VALVE換向閥


SLIDE GATE VALVE／KNIFE GATE VALVE滑板閥


FEEDING SHOE在線噴射器(加料室)

BLOWER羅茨風機


COMPRESSOR壓縮機


HEAT EXCHANGER換熱器


IN-LINE FILTER(GUARD FILTER)在線過濾器

CENTRIFUGAL FAN風扇(離心風機)


CENTRIFUGAL PUMP離心泵

2、FLUID物料代號
P：PROCESS 工藝物料(包括聚合物)
V：VENT OR FLARE 排氣、排空成火炬氣
LS：LOW PRESSURE STEAM 低壓蒸汽
MS：MEDIUM PRESSURE STEAM中壓蒸汽
HS：MEDIUM PRESSURE STEAM高壓蒸汽
SC：STEAM CONDENSATE 蒸汽凝液
CWS：COOLING WATER SUPPLY 冷卻水供水
CWR：COOLING WATER RETURN 冷卻水回水
HWS：HOT WATER SUPPLY 熱水供水
HWR：HOT WATER RETURN熱水回水
DW：DEMINERALIZED WATER脫鹽水
PW：FRESH WATER 新鮮水，工藝水
FW：FIRE FIGHTING WATER 消防水
PA：PLANT AIR 工廠空氣
IA：INSTRUMENT AIR儀表空氣
N：NITROGEN,PURGE NITROGEN氮氣，沖洗氮氣
Nd：PROCESS NITROGEN 工藝氮氣，輸送氮氣
A：CONVEYING AIR,PURGE AIR輸送空氣，沖洗空氣
W：WASH WATER沖洗水
WW：WASTE WATER廢水

3、EQUIPMENT ABBREVIATIONS設備代號
TK：SILO，BIN 料倉 
E：COOLER,HEAT EXCHANGER冷卻器、換熱器類
R：REACTOR反應器類
K：TANK槽，罐類
P：PUMP泵類
C：BLOWER,COMPRESSOR,FAN壓縮機，鼓風機類
RF：ROTARY VALVE旋轉閥
HV：DIVERTER VALVE換向閥
SV：SLIDE VALVE滑板閥 
F：GUARD FILTER,BAG FILTER過濾器
Y：ELUTRIATOR,CYCLONE淘洗器，旋風分離器
MP：FEEDING SHOE在線噴射器(加料室)
X：OTHER EQUIPMENT其它設備

4、EQUIPMENT NUMBERING設備位號
舉例：C-8001A/B/C......
[C]：EQUIPMENT CLASSIFICATION設備類型代號
[80]：UNIT IDENTIFICATION單元號
[01]：EQUIPMENT NUMBER設備順序號
[A/B/C]：INDICATES SPARED/PARALLEL DUTY并聯及備用

5、INSULATION LEGEND保溫代號
HC：HEAT CONSERVATION INSULATION保溫
ST：STEAM TRACING INSULATION蒸汽伴熱
HWT：HOT WATER TRACING INSULATION熱水伴熱
ET：ELECTRIC TRACING INSULATION電伴熱
C：REFRIGERATION INSULATION保冷
PP：PERSONNEL PROTECTION INSULATION人身防護
NC：mACOUSTIC INSULATION隔音


H：HEAT CONSERVATION INSULATION保溫
C：REFRIGERATION INSULATION保冷
P：PERSONNEL PROTECTION人身防護
N：ACOUSTIC INSULATION隔音
E：ELECTRIC TRACING INSULATION電伴熱

6、GENERAL NOTE說明
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.
安全泄放閥建議：
安全泄放閥，出口管要考慮泄放時產生的推力。
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臺3.5m以上。管子低點開9.5mm淚孔。
安全泄放閥入口端避免使用縮徑閥，建議使用全通徑閥。
安全閥進出口閥應鉛封開，除非另有說明。

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.
除非說明，下列建議適用于所有放空或導凈閥：放空閥和導凈閥的等級應與主管道或設備一致，閥門的尺寸為3/4”或者等于管線尺寸，取其小者，與設備相接的閥門與管接口尺寸一致，閥門要裝上絲堵或者法蘭蓋。

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
除非說明，所有儀表從工藝管引出，切斷閥使用閘閥或球閥：
1/2”：工藝管1/2”
3/4”：工藝管≥3/4

7、INSTRUMENTATION儀表圖例符號
P&ID圖中的儀表圖例及符號是儀表工應知應會知識，為此昌暉儀表在文章《輕松看懂P&ID圖中的儀表圖例符號》專門介紹。
 
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