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物料代号物料代号用于管道编号，分为工艺物料代号及化学品、辅助物料和公用物料代号两类。1、工艺物料代号编写代号英文中文词义PProcessstream工艺物料（通用代号）PGProcessgas工艺气体PLProcessliquid工艺液体PSProcesssolid工艺固体2、化学品、辅助物料和公用物料代号缩写代号英文中文词义AAir气ACAcid酸、酸液ACGAcidi1ygas酸性气体ACLAcidi1yliquid酸性液体ACSAcidi1ysewage酸性污水ADAdditive添加剂AMAmmonia氨AMGGaseousammonia氨气（作制冷剂）AMLLiquidammonia液氨（作制冷剂）AMWAmmoniawater氨水BDB1owdown排污BRBrine盐卤水BWBOi1erfeedwater锅炉给水Csteamycondensate水蒸汽凝液CACaustic碱，碱液CAGCausticgas碱性气体CALCausticliquid碱性液体CASCausticsewage碱性污水CATCata1yst催化剂CHWChilledwater冷冻冷水（指0℃以上）CLChlorine氯CMChemicals化学品CNSCleansewage清净下水COCoolingoil冷油（冷却油）COOCarbondioxide二氧化碳CRSContaminatedrainandsewage污染下水（指污染的雨水、冲洗水、放净水、排水）SWChilledsaltwater冷冻盐水（指0℃以下）CTMCTMCoolingtransfermaterial冷载体CWCoolingwater冷却水CWRCoolingwaterreturn冷却水口水CWSCoolingwatersupp1y冷却水供水DAWDealkalizedwater脱碱水（用于除盐水系统）DEWDemineralizedwater除盐水（脱盐水）DRDrain排水、排液DWDomesticwater生活用水、饮用水EAExhaustair排出空气EREthane（orethylene）refrigerant乙烷（或乙烯）冷冻剂EsExhauststeam排出蒸汽FFlareexhaust火炬排放气FGFuelgas燃料气FLGFluegas烟道气FLWFiltratedwater过滤水FOFueloil燃料油FOSFoamingsolution泡沫液FRFreonrefrigerant氟里昂冷冻剂FTFusedsalt熔盐FWFirewater消防水GOGlandoil填料油GWGassedwater加气水、溶气水HHydrogen氢气HAHydrochloricacid盐酸HCHighpressurecondensate高压蒸汽凝液HOHeatingoi！热油、加热油、热载油HSHighpressuresteam高压蒸汽HTMHeattransfermaterial热载体HWHotwater热水HWRHotwaterreturn热水回水（用于采暖、加热、空调等）HWSHotwatersupp1y热水给水（用于采暖、加热、空调等）HYLHydraulicliquid液压液体HYOHydraulicoil液压油HYWHydraulicwater液压水IAInstrumentair仪表空气ICWIntermediatecoolingwater冷却水二次用水IDWIndustrialanddomesticwater生产和生活用水IGInertGas惰性气体ISIndustrialsewage生产污水（泛指工艺过程产生的污水）IWIndustrialwater生产用水LCLowpressurecondensate低压蒸汽凝液LDLiquiddrain排液（泛指工艺排液）LOLubricatingoil润滑油LSLowpressuresteam低压蒸汽MCMediumpressurecondensate中压蒸汽凝液MRMethanerefrigerant甲烷冷冻剂MSMediumpressuresteam中压蒸汽NNitrogen氮气NGNatura1gas天然气OLOil油（泛指除原料外的油）OSOi1ysewage含油污水OXOxygen氧气PAP1antair工厂空气PRPropane（orpropylene）refrigerant丙烷（或丙烯)冷冻剂PWPolishedwater精制水RRefrigerant冷冻剂、冷媒、制冷剂RAWRawwater原水RCSRainwaterandcleansewa雨水及清净下水(指清净的雨水、冲洗水、放净水、排水)RWRawwater雨水SSteam蒸汽SASulfuricacid硫酸SEWSeawater海水SFWSoftwater软水（软化水）SLSealingliquid密封液SOSealingoil密封油SSSanitarysewage生活污水SUSludge，slurry污泥、泥浆SWSealingwater密封水TWTreatedwastewater处理后的废（污）水VEVacuumexhaust真空排放气VGVentGas放（排）空气体WWater水jWACwasteacid废酸WCAwastecaustic废碱WGwastegas废气WLWasteliquid废液WOwasteoil废油WSWastesolid废渣废水（各种污水统称）