PID流程圖圖例注解：交流接觸器：觸點(diǎn)表達(dá)方式：NC:normalclose正常狀態(tài)關(guān)常閉觸點(diǎn)NO:normalopen正常狀態(tài)開常開觸點(diǎn)閥門定位器：觸點(diǎn)表達(dá)方式：（重要出現(xiàn)在電氣原理圖中)TSO:力矩開關(guān)常開觸點(diǎn):torqueswitchopenTSC：力矩開關(guān)常閉觸點(diǎn)：torqueswitchcloseLSO:行程開關(guān):locationalswitchopenLSC：行程開關(guān)：locationalswitchcloseLSF:閃光開關(guān)：locationalswitchflas閥門定位器：PID圖紙中閥門附近標(biāo)的符號(hào):（重要出現(xiàn)在PID圖紙上)FC：faultcolse故障時(shí)閥門關(guān)閉FO：faultopen故障時(shí)閥門打開TSO:tightshutoff

緊急迫斷閥GSO:controlvalvewithlimitswitchfullopen(閥門全開位置反饋，后臺(tái)顯示并統(tǒng)計(jì))GSC：controlvalvewithlimitswitchfullclose(閥門全關(guān)位置反饋，后臺(tái)顯示并統(tǒng)計(jì)）GCO：屬于GSC與GSO的合并(閥門全開/全關(guān)位置反饋）ZSC:positionswitchclose閥門全關(guān)批示(后臺(tái)統(tǒng)計(jì)并顯示）ZSO:positionswitchopen閥門全開批示（后臺(tái)統(tǒng)計(jì)并顯示)LC：locationalclose閥門現(xiàn)場關(guān)閉批示(現(xiàn)場批示，不遠(yuǎn)傳。）LO:locationalopen閥門現(xiàn)場啟動(dòng)批示(現(xiàn)場批示，不遠(yuǎn)傳.）CSC:carsealclose表達(dá)安全閥:鉛封關(guān)（未經(jīng)允許嚴(yán)禁啟動(dòng)閥門,鉛封狀態(tài)為關(guān)閉）CSO：carsealopen表達(dá)安全閥：鉛封開（未經(jīng)允許嚴(yán)禁關(guān)閉閥門，安全閥鉛封狀態(tài)為啟動(dòng))控制符號(hào)PID圖紙正菱形+US:聯(lián)鎖開關(guān)控制,此級(jí)別的聯(lián)鎖在DCS系統(tǒng)中實(shí)現(xiàn)UZ:聯(lián)鎖開關(guān)控制,此級(jí)別的聯(lián)鎖在ESD系統(tǒng)中實(shí)現(xiàn)（SIS系統(tǒng))KS：開關(guān)量次序控制此控制在DCS系統(tǒng)中實(shí)現(xiàn)測量符號(hào)PID圖紙溫度測量符號(hào)：TI:temperatureinstruction溫度批示（帶現(xiàn)場批示,溫度傳感器)TT:temperaturetransmitter溫度變送器（輸出4-20mA,不帶溫度批示)TG：temperaturegauge溫度現(xiàn)場儀表（就地儀表gauge測量)TE：temperatureelement溫度元件（不帶現(xiàn)場批示，TE涉及TC和RTD，屬于一次儀表）TS：temperatureswitch溫度開關(guān)TIA：temperatureinstructionalarm接點(diǎn)溫度表TW：thermal-well溫度保護(hù)管TIT：temperatureindicatortransmitter溫度變送器（輸出4-20mA，帶溫度批示,屬于二次儀表）TC：thermalcouple熱電偶RTD:resistancetemperaturedetector熱電阻TD：temperaturedifference溫差壓力、壓差測量符號(hào):PG:pressuregauge壓力PT：pressuretransmitter壓力變送器PS:pressureswitch壓力開關(guān)PDI：pressuredifferenceinstruction壓差批示(變送器）PSV：pressuresetupvalue壓力PISA：pressureinstructionsetupalarm壓力批示并設(shè)定報(bào)警值（上限/下限）PDIS：pressuredifferenceinstructionsetupPD：pressuredifference壓差PDIAZ：pressuredifferenceinstructionalarm(壓差批示報(bào)警，進(jìn)入SIS系統(tǒng)）PI：pressureinstruction壓力批示PIT:pressureindicatortransmitter壓力批示變送PIA:pressureindicatoralarm壓力批示報(bào)警物位測量符號(hào):LI:levelinstruction液位批示LT:leveltransmitter液位變送器LG:levelgauge液位現(xiàn)場批示LISZA：levelindicatorsetupalarm液位批示并設(shè)定報(bào)警值（上限、下限)；進(jìn)入SIS系統(tǒng)。流量測量符號(hào):FG：flowgauge現(xiàn)場流量顯示FI：flowinstruction流量批示FT:flowtransmitter流量變送器FE：flowelement流量測量元件FV:flowvalve流量執(zhí)行元件（流量調(diào)節(jié)閥）FR：flowrecord流量統(tǒng)計(jì)FQ:flowFRC:flowrecordcontrol流量統(tǒng)計(jì)調(diào)節(jié)FIC：flowindicatorcontrol流量批示調(diào)節(jié)FICS：flowindicatorcontrol流量批示調(diào)節(jié)聯(lián)鎖FRSA：flowrecordsetupalarm流量統(tǒng)計(jì)設(shè)立上限、下限報(bào)警值FFIC:流量計(jì)算控制FIYA：在線分析儀表符號(hào)：AT：analyticaltransmitter分析變送器AI:analyticalinstruction分析顯示F。位移類儀表符號(hào):SICYA:speedindicatorcontrol速度顯示控制聯(lián)鎖報(bào)警ST:speedtransmitter振動(dòng)/位移變送器監(jiān)控儀表流程圖慣用圖例符號(hào)：圓形:現(xiàn)場安裝單臺(tái)常規(guī)儀表圓形+一條直線：控制室安裝單臺(tái)常規(guī)儀表圓形+兩條直線：現(xiàn)場盤裝單臺(tái)常規(guī)儀表正方形+圓形：現(xiàn)場安裝、DCS儀表正方形+圓形+一條直線:控制室安裝、DCS儀表正方形+圓形+兩條直線：現(xiàn)場盤裝、DCS儀表正方形+正菱形：現(xiàn)場安裝，可編程邏輯控件正方形+正菱形+一條直線：控制室安裝、可編程邏輯控件正八邊形：現(xiàn)場安裝、計(jì)算機(jī)功效正八邊形+一條直線:控制室安裝、計(jì)算機(jī)功效正八邊形+兩條直線：現(xiàn)場盤柜安裝、計(jì)算機(jī)功效正菱形+I/位號(hào):聯(lián)鎖系統(tǒng)圖符號(hào)(I:interlock)正菱形+P+箭頭線：儀表吹掃符號(hào)(P：purge）正菱形+R：復(fù)位裝置圖符號(hào)（R：reset）注:控制室安裝：不是真正意義上的安裝,而是指其含有遠(yuǎn)傳功效,其測量成果在后臺(tái)顯示、運(yùn)算、統(tǒng)計(jì)、設(shè)定上下限報(bào)警值及控制等功效.儀表能源的字母組合標(biāo)志：AS:airsupply空氣氣源IA：instrumentair儀表空氣ES：electricsupply電源GS:gassupply氣源HS:hydraulicsupply液壓源NS：niteogensupply氮?dú)庠碨S：steamsupply蒸汽源WS：watersupply水源PNS：purgeniteogensupply吹掃氮?dú)庠碈WS：coolwatersuppl