AAAirAABCAssociated Air Balance AssociationAACEAmerican Association of Cost EngineersAARHArithmetic Average RoughnessAASHTOAmerican Association of State Highway and TransporA/CAir ConditionerA/DAnalog/DigitalA/GAbove GroundABPRAnimal ByproductsABSAcylonitrile Butadiene StyreneABSAmerican Bureau of ShippingABWRAdvanced Boiling Water ReactorACAlternating CurrentACAsphalt ConcreteACARPAustralian Coal Association Research ProgramACCUAir Cooled Condensing UnitACIAmerican Concrete InstituteACSAmerican Construction SocietyACTAutomatic Custody TransferADAcid DrainADAnaerobic DigestionADCAverage Daily ConsumptionADIPAmino Di IsopropanolADMArrow Diagram MethodADRAluminium Dome RoofAEDCAward Engineering/Design ContractAFBMAAnti Friction Bearing Manufacturers AssociationAFCAutomatic Frequency ControlAFFFAqueous Film Forming FoamAFNORAssociation Francaise de NormalisationAFRAverage Flow RateAGAAmerican Gas AssociationAGCAssociated General ContractorsAGCAutomatic Generation ControlAGMAAmerican Gear Manufacturers AssociationAHAcid HydrocarbonAHArabian HeavyAHUAir Handling UnitAIArtificial IntelligenceAIHAAmerican Industial Hygiene AssociationAISCAmerican Institute of Steel ConstructionAISIAmerican Iron and Steel InstituteALAluminiumALArabian LightALARAAs Low As Reasonably AchievableALARPAs Low as Reasonably PracticableALEAbnormal Level EarthquakeALPArticulated Loading PlatformALSAccidental Limit StateAMAmplitude ModulationAMArabian MediumAMHActual ManhourAMRSAdvanced Mobile Radio SystemANPAcid Neutralisation PitANSIAmerican National Standards InstituteAOFAbsolute Open FlowAOVAir Operated ValveAPCSApproved Protective Coating SystemAPDAutomated Piping DesignAPIAmerican Petroleum InstituteAPSApplications SoftwareASAcid SewerASBAsymmetrical BeamASCEAmerican Society of Civil EngineersASCIIAmerican Standard Code for Information InterchangeASDAllowable Stress DesignASHRAEAmerican Society of Heating, Ventilation and Air CASMEAmerican Society of Mechanical EngineersASPAluminium Steel PolyethyleneASTMAmerican Society for Testing and MaterialsATBAll Trunks BusyATFAlternative Transport FuelsATMAtmosphericATMAtmosphereAUPAverage Unit PriceAUTAutomated Ultrasonic TestingAVBAtmospheric Vacuum BreakerAVGAverageAWAcid WasteAWEAAmerican Wind Energy AssociationAWGAmerican Wire GaugeAWOAdditional Work OrderAWPAAmerican Wood Preservers AssociationAWSAmerican Welding SocietyAWWAAmerican Water Works Association

BB&SBell and SpigotB.C.D.Bolt Circle DiameterBBBolted BonnetBBDBoiler Blow DownBBEBevel Both EndsBCBolted CoverBCBolt CircleBCSABritish Constructional Steelwork AssociationBDBolt DownBDRBlast Design RequirementBDTBulk Data TransferBEBeveled EndBEASTBuilding Evaluation and Screening ToolBEDDBasic Engineering Design DataBEEBundesverband Erneuerbare EnergieBEPBreak Even ProductionBEVBreak Even ValueBFBlind FlangeBFDBlock Flow DiagramBFPBackflow PreventionBFWBoiler Feed WaterBHBoreholeBICSIBuilding Industry Consulting Services InternationaBIOXBiological OxidationBLBattery LimitBLDBlindBLDGBuildingBLEBevel Large EndBLEVEBoiling Liquid Expanding Vapor ExplosionBMBending MomentBMSBurner Management SystemBOBuild, OperateBOBBottom of BarrelBODBarrels per Operating DayBODBiochemical Oxygen DemandBOEBevel One EndBOFBottom of FoundationBOMBill of MaterialBOOBuild, Own, OperateBOOTBuild, Own, Operate, TransferBOPBottom of PipeBOPBalance of PlantBOPBlow Out PreventerBOPDBarrels of Oil Per DayBOSBalance of SystemBOTBuild, Operate, TransferBPCDBarrels per Calender DayBPDBarrels Per DayBPSBytes per SecondBRBronzeBRABuilding Risk AssessmentBSBritish StandardsBSBritish SteelBSBio SludgeBSDBuilding Standards DivisionBSEBevel Small EndBSIBritish Standards InstitutionBSTBaker-Strehlow-TangBTMBottomBTMBuoyant Turret MooringBTUBritish Thermal UnitBUBusiness UnitBWButt WeldBWEABritish Wind Energy AssociationBWPDBarrels of Water per Day

CCCentigrade; CelsiusCChemicalC&IControls and InstrumentationC/RConstruction/RepairC/RChange RequestCACausticCACongested AreaCACorrosion AllowanceCADComputer Aided DesignCADDComputer Aided Drafting and DesignCAEComputer Aided EngineeringCALCCalculatedCALMCaternary Anchor Leg MooringCAMCongested Area ModellingCAMACentralised Automatic Message AccountingCAN/CSACanadian StandardsCAOCertified Acceptance by OperationsCAPEXCapital ExpenditureCAREConservation Accreditation Register for EngineersCASCaustic SewerCATCatalystCBControl BuildingCBCatch BasinCBCCoupled Bonding ConductorCBMCoal Bed MethaneCBNGCoal Bed Natural GasCBRCalifornia Bearing RatioCBSControllable Bent SubC-CCentre to CentreCCCComodity Classification CodeCCEICommon Class Expansion IndicesCCIRInternational Radio Consulative CommitteeCCISCommon Channel Interoffice SignallingCCNCatalog Classification NumberCCOCurrent Cost OutlookCCPSCentre for Chemical Process SafetyCCSComputer and Communication ServicesCCSCompressor Control SystemCCSCarbon Capture and StorageCCTVClosed Circuit TelevisionCDChemical DrainCDClosed DrainCDCCentral Dispatch CenterCDRCritical Design ReviewCDSCentral Dispatch SystemCEMAConveyor Equipment Manufacturers AssociationCFPCapital Facilities PlanCFPEChief Fire Prevention EngineerCFRCode of Federal RegulationsCGACompressed Gas AssociationCGTCombustion Gas TurbineCGTGCombined Gas Turbine GeneratorCGTGCombustion Gas Turbine GeneratorCHSCircular Hollow SectionCICast IronCIFCost, Insurance, FreightCIFCommunity and Industrial FacilityCIRIAConstruction Industry Research and Information AssCISContract Information SystemCISHECChemical Industry Safety, Health and EnvironmentalCJConstruction JointCJContraction JointCLCentre LineCMCentimeterCMConstruction ManagerCMTConstruction Management TeamCMUConcrete Masonry UnitsCMAACrane Manufacturers Association of AmericaCNCComputer Numerically ControlledCNPPCountry Nuclear Power ProfilesCOChange OrderCOClean OutCOCContinuously Oily/Chemical ContaminatedCOGENCombined GenerationCOLColumnCOLACost of Living AllowanceCOMAHControl Of Major Accident HazardsCOMFARComputer Model for Feasibility Analysis and ReportCONCConcentricCONNConnectionCOTCharacter Orientated TerminalCOTSCommercial Off The ShelfCPFCentral Processing FacilityCPLGCouplingCPTCone Penetration TestCPUCentral Processing UnitCPVCChlorinated Polyvinyl ChlorideCRComputed RadiographyCRChromiumCRSCentresCRSIConcrete Reinforcing Steel InstituteCRTCathode Ray TubeCSChemical SewerCSConstruction StartCSCarbon SteelCSACanadian Standards AssociationCSIRCentre of Scientific and Industrial ResearchCSOCar Sealed OpenCSPConcrete Surface ProfileCSPConcentrated Solar PowerCSUDConstruction Start Up DateCSWClean Surface WaterCSWClean Storm WaterCTCoiled TubingCTICooling Tower InstituteCTOPCracked Tip Opening DisplacementCTSConstruction Technical SupportCUCopperCWChilled WaterCWCoated and WrappedCWOChain Wheel OperatorCWPCold Working PressureCWPContractors Work PlanCWRContinuous Welded RailCWRCooling Water ReturnCWSCooling Water Supply

DD&BDesign and BuildD/CDirect ChargeD/PDifferential PressureD-ADigital to AnalogDAFDissolved Air FlotationDASDDirect Access Storage DeviceDAVData Above VoicedBDecibelDBDesign, BuildDBDuct BankdBADecibels using the A-weighted scaleDBMDesign Basis MemorandomDBODesign, Build, OperateDBOTDesign, Build, Operate, TransferDBSPDesign Base Scoping PaperDCDirect CurrentDCCDisaster Control CentreDCLMDirect Charge List of MaterialsDCSDistributed Control SystemDDCDirect Digital ControllerDDDDirect Distance DialDEADi Ethanol AmineDEGDegreeDELDirect Exchange LineDEMADiesel Engineers Manufacturers AssociationDFTDry Film ThicknessDFWDeaerator Feed WaterDGADi Glycol AmineDIDuctile IronDIADiameterDIDDirect Inward DiallingDIFDynamic Increase FactorDIMDimensionDINDeutche Industrie Normen (German Standard)DMDe-MineralisationDMSDynamic Pile MonitoringDMWDemineralised WaterDNDiameter Nominal (Metric)DOBISDortmunder BibliothekssystemDODDirect Onward DiallingDOEDepartment of EnergyDOTDepartment of TransportationDOXDirect Overhead ExpenseDPData ProcessingDPDesign PressureDPDynamic PositionedDPDial PulseDPCDestination Point CodeDPDTDouble Pole Double ThrowDPSRData Processing Service RequestDRNDrainDRPDistribution Requirement PlanningDSDownspoutDSDiscipline SuperintendentDSData StoreDSDrilling SitesDSCDye Solar CellsDSIDigital Speech InterpretationDSWDistilled WaterDTDesign TemperatureDTDuct TrimsDTDRDial Tone Delay RecorderDTEDrill Through EquipmentDUVData Under VoiceDVDDedicated Voice DispatchDWDrinking WaterDWFDry Weather FlowDWGDrawingDWTDead Weight TonnesDWVDrain, Waste, Vent

EEExhaust SteamE&IElectrical and InstrumentationE&PExploration and ProductionEAEachEAGEEuropean Association of Geoscientists and EngineerEBExtended BonnetECEurocodeECEddy Current Testing (Examination)ECCEccentricECDEnergy Conversion DeviceECLEstablished Column LineEDHElectrical Duct HeaterEDMEngineering Department ManualEDMSElectronic Document Management SystemEDPElectronic Data ProcessingEEMUAEngineering Equipment and Material Users AssociatiEFEntrance FacilityEFEvaluation FactorEFDEngineering Flow DiagramsEFRTExternal Floating Roof TankEFWElectric Fusion WeldedEHFExtra High FrequencyEIEnd ItemEIAEmergency Instrument AirEIAElectronic Industries AssociationEIAEnvironmental Impact AnalysisEISEquipment Inspection ScheduleEIVEmergency Isolation ValveEJExpansion JointELElevationELEExtreme Level EarthquakeELFEXTEqual Level Far End Cross TalkELLElbowELLIPEllipticalELSBMExposed Location Single Buoy MooringEMCElectromagnetic CompatibilityEMDElectric Motor DriveEMIElectromagnetic InterferenceEMTElectrical Metallic TubingEOLElboletEOTElectric Overhead TravellingEPCEngineering, Procurement, ConstructionEPCMEngineering, Procurement, Construction ManagementEPDMEthylene-Propylene-Diene Terpolymer / EP RubberEPICEngineering, Procurement, Installation and CommisEQEqualERExpenditure RequestEREquipment RoomERCExpenditure Request CompletionERLEcho Return LossERMEnvironmental Resource ManagementERPGEmergency Response Planning GuidelinesERWElectric Resistance WeldedESDEmergency ShutdownESDUEngineering Sciences Data UnitESLEstablished Site LevelESOEngineering Service OrganisationESOEngineering Service OrderESPEngineering Study ProgramETAEstimated Time of ArrivalETBEEthyl Tertiary Butyl EtherETPRExtended Thermal Plastic RubberETSEmissions Trading SchemeEWEye WashEWAExtra Work AuthorisationEWHElectric Water HeaterEWOEngineering Work Order

FFFahrenheitF/LFlowlineFABFabricateFAOFood and Agriculture Organisation of the United NaFATFactory Acceptance TestFBEFusion Bonded EpoxyFBEFlange Both EndsFBHPFlowing Bottom Hole PressureFCAWFlux Cored Arc WeldingFCCField Control CoordinatorFCCFluid Cat CrackerFCOFloor Clean OutFDFloor DrainFDDynamic ForceFDMFrequency Division MultiplexingFDNFoundationFDSFire Detection SystemFEFinite ElementsFEAFinite Element AnalysisFED STDFederal StandardFEEDFront End Engineering DesignFEMFinite Elements ModellingFEPPerfluoro (Ethylene-Propylene) CopolymerFESFlywheel Energy StorageFFFirst FlushFFFinished FloorFFFoundation FieldbusFFFlat FaceF-FFace to FaceFFLFinished Floor LevelFFPFirst Flush PondFFSFitness For ServiceFFWField Fillet WeldFGFuel GasFGHHigh Pressure Fuel GasFGLFinished Ground LevelFGLLow Pressure Fuel GasFGRSFlare Gas Recovery SystemFIIndicating Flow MeterFIGFigureFINFinishFLEFlexible Large EndFLEXFlexibleFLGFlangeFLOFlushing OilFLPFloating Loading PlatformFMFactory MutualFMFrequency ModulationFMRField Material RequisitionFMUFitting Make UpFNPTFemale National (Taper) Pipe ThreadsFOFuel OilFOBFlat on BottomFOEFlange One EndFOFFace of FlangeFOTFiber Optic TransmissionFOTFlat on TopFPFull PortFPEFair Price EstimateFPSFloating Production SystemFPSOFloating Production Storage and OffloadingFPUFloating Point UnitFR&PForm, Rebar and PourFREDFire Release Explosion DispersionFRLFinished Road LevelFRPFibreglass Reinforced PlasticFRPFibre Reinforced PlasticFSFinished SurfaceFSFeasibility StudyFSForged SteelFSFlow SwitchFSFactor of SafetyFSEFlange Small EndFSOFloating Storage and OffloadingFTFoot, FeetFTGFittingFTSPMFixed Tower Single Point MooringFVFull VacuumFWFillet WeldFWFire WaterFWHPFlowing Well Head PressureFWHTFlowing Well Head TemperatureFAAFederal Aviation Administration

GGGramGAGeneral ArrangementGAGaugeGALVGalvanisedGASMOGulf Arab Standards and Measurement OrganizationGBEGroove Both EndsGCGas CromatographGEGroove EndGEAGeothermal Energy AssociationGESCGeneral Engineering Services ContractGFRPGlass Fibre Reinforced PlasticGGGart GasGHGGreen House GasGIGeneral InstructionGIMGlobal Interface MeetingGIPGas Injection PlantGJGround JointGLEGroove Large EndGMAWGas Metal Arc WeldingGMPGuaranteed Maximum PriceGOGear OperatorGOEGroove One EndGOMGulf of MexicoGORGas Oil RatioGOSGrade of ServiceGOSPGas Oil Seperation PlantGPFGeneral Planning ForecastgpmGallons per MinuteGPSGlobal Positioning SystemGRGradeGRNDGround(ed)GRPGlass Reinforced PlasticGSGravity SewerGSEGroove Small EndGSIGeological Strength IndexGSKTGasketGSPDGeneral Service Plant DepreciationGSPRGeneral Service Potential RiseGSSGravity Sewer SystemGSVGross Standard VolumeGTAWGas Tungsten Arc WeldingGTEGeneral Telephone and ElectronicsGT-MHRGas Turbine Modular Helium ReactorGWRGuided Wave Radar

HHHorizontalHHydrogenH2SHydrogen SulphideHAZHeat Affected ZoneHAZIDHazard IdentificationHAZOPHazard and Operability StudyHBHose BibbHBHardness Brinell ScaleHCLHydrochloric AcidHCRHybrid Catenary RiserHDHeadHDHeavy DensityHDHolding DownHDBHydrostatic Design BasisHDPEHigh Density PolyethyleneHDRHeaderHEHeat ExchangerHEXHexagonalHFHard FacedHFHigh FrequencyHIHydraulic Institute StandardHICHydrogen Induced CrackingHIPSHigh Integrity Protection SystemHKHardness Knoop ScaleHLTHeap Leach TrialHMIHuman Machine InterfaceHOHigh OrderHOHydraulic OilHOVHydraulic Operated ValveHPHigh PressureHPHigh PointHPFSHigh Point Finished SurfaceHPGHyperion Power GenerationHPPHigh Point PavingHPPTHigh Pressure Production TrapHPTTHigh Pressure Test TrapHPAASHigh Pressure Air Assist SystemHRHuman ResourcesHR15NHardness Rockwell 15N ScaleHRBHardness Rockwell B ScaleHRCHardness Rockwell C ScaleHRSGHeat Recovery Steam GeneratorHSEHealth Safety & EnvironmentHSFGHigh Strength Friction GripHSGHydrogen Sulphide GasHTHeat TreatmentHUHumidifierHVHigh VoltageHVHardness Vickers ScaleHVACHeating Ventilation Air ConditioningHVLHighly Volatile LiquidHWHand WheelHzHertz

II&CInstrumentation and ControlsI/OInput/OutputIAInstrument AirIALAInternational Association of Lighthouse AuthoritieIAMGInternational Association for Mathematical GeologyIAPMOInternational Association of Plumbing and MechaniIASSInterantional Association for Shell and Spacial StIBBMIron Body Bronze MountedIBCInternational Building CodeIBNInstitute Beige de NormalisationIBPSIntermediate Booster Pump StationICIntermediate Cross ConnectICDInterface Control DocumentICDInflow Control DevicesICEInstitution of Civil EngineersICEAInsulated Cable Engineers AssociationICPRInterantional Concrete Repair InstituteICVInflow Control ValveIDInside DiameterIDInch DiameterIDAInternational Development AssociationIECInternational Electrotechnical CommisionIEEEInstitute of Electrical and Electronics EngineersIFInertial FilterIFIntermediate FrequencyIFBIssue for BidIFCInternational Fire CodeIFCIssued For ConstructionIFRInternal Floating RoofIGCCIntegrated Gasification Combined CycleILInvert LevelILDInstrument Loop DiagramILOInternational Labour OrganisationIMIntermodulationIMCInternational Mechanical CodeIMOInternational Maritime OraganizationIMSInformation Management SystemIMTSImproved Mobile Telephone SystemINInchINSInsulationINT.InternalINTIBIndustrial and Technological Information BankIPInterface PointIPCInternational Plumbing CodeIPPTIntermediate Pressure Production TrapIPSIntermediate Pump StationIPTIInternational Petroleum Technology InstituteIRIndustrial RelationsIRInfraredIRECInterstate Renewable Energy CouncilIRHDInternational Rubber HardnessIRISInternational Reactor Innovative and SecureIRMInspection, Repair and MaintenanceIRRInternal Rate of ReturnISAInstrument Society of AmericaISAInternational Society for Measurement and ControlISBLInside Battery LimitsISDInstrument Segment DiagramISFIndustrial Support FacilitiesISLTIndian Spring Low TideISNRSInside Screw Non Rising StemISOIsometric DrawingISOInternational Standards OrganizationISOInternational System StandardISRSInside Screw Rising StemISSInstrument Specificaton SheetISTRUCTEInstitution of Structural EngineersITInformation TechnologyITBInvitation to BidITCSImpact Tested Carbon SteelITPInspection and Test PlansITSIndirect Tensile StrengthIWAIndividual Work Area

JJDAJoint Development AgreementJEJoint EfficiencyJISJapanese Standards AssociationJVJoint Venture

KKCSKilled Carbon SteelKGKilogramKOKnock OutKPAKilopascals

LLLengthL/MList of MaterialsLANLocal Area NetworkLATLowest Astronomical TideLCCLife Cycle CostLCDLiquid Crystal DisplayLDFLay Down in FieldLDPELow Density PolyethyleneLEDLight Emitting DiodeLELLower Explosive LimitLFCPLocal Fire Control PanelLFLLower Flammable LimitLIBISLeuvens Integraal Bibliotheek SystemLJLap JointLLPLast Landed PriceLMTDLog Mean Temperature DifferenceLNGLiquified Natural GasLOLube OilLOBLimited Open BookLODMATLowest One Day Mean Atmospheric TemperatureLPLow PressureLPCPDLitres Per Capita Per DayLPDLoss Prevention DepartmentLPDCPDLitres Per Dental Chair Per DayLPDTLow Pressure Degassing TankLPFSLow Point Finished SurfaceLPGLiquified Petroleum Gas (Propane and Butane)LPGLiquified Petroleum GasLPHPDLitres Per House Per DayLPPLow Point PavingLPPTLow Pressure Production TrapLPSMPDLitres Per Capita Square Meter DayLPTLiquid Penetrant TestLPTLow PointLRLong RadiusLRFDLoad and Resistance Factor DesignLSLump SumLSLifting StationLS/PMLump-sum Procure/BuildLSPBLumpsum, Procure, BuildLSTKLumpsum TurnkeyLTLead TimeLTELong Tangent ElbowLUPLand Use PermitLVLow VoltageLVLLevelLWNLong Welding Neck

MMMeterM/EMechanical/ElectricalmAMilliampereMACsMoves, adds, changesMAGMetal Active Gas WeldingMATICSMaterial Inventory Control SystemMAWPMaximum Allowable Working PressureMAXMaximumMBCDThousand barrels per Calender DayMBDThousandd Barrels per DayMBODThousand barrels per Operating DayMCMain Cross ConnectMCCMechanical Completion CertificateMCTMulti Cable TransitMDMeasured DepthMDEAMethyl-di-ethynol amineMDMTMinimum Design Metal TemperatureMDOFMulti Degree of FreedomMEMethanolMEManufacturing EngineeringMEAMono Ethanol AmineMESGMaximum Experimental Safe GapMFMeter FactorMFAPMembrane Filtration Affinity PurificationMFCLMaterial Flow Control ListMFGManufacturerMFSMaximum Flooding SurfacesMHMan HoleMHAMotor Head AssemblyMIMalleable IronMICMinimum Ignition CurrentMICAMaterials Investment Control AnalystMIGMetal Inert Gas WeldingMINMinimumMISCMiscellaneousMJMovement JointMJMechanical JointMMAManual Metal Arc WeldingMMIMan Machine InterfaceMMSMinerals Management ServiceMMscfdMillion standard cubic feet per dayMNPTMale National (Taper) Pipe ThreadsMOMolybdenumMOMist OilMODMinistry of DefenceMODUMobile Offshore Drilling UnitMOPUMobile Offshore Production UnitsMOSAICMaterials on Order Status Analysis Information andMOTMinistry of TransportMOUMobile Offshore UnitMOUMemorandom of UnderstandingMOVMotor Operated ValveMPMagnetic Particle TestingMPFMMultiphase Flow MeterMPMSManual of Petroleum MeasurementMPPManpower Projection PlanMPTAMechanical Power Transmission AssociationMRMaterial RequisitionMRCMaximum Reservoir ContactMRFManpower Requirements ForecastMROMaintenance Repair OperationsMSMild SteelMSCMaximum Sustained CapacityMSCMetering Supervisory ComputerMSDMaterial Selection DiagramMSDSMaterial Safety Data SheetMSEMaterial System EnhancementsMSISMaterial Supply Information SystemsMSLMean Sea LevelMSOMaterial Supply OrganisationMSSManufacturers Standardization SocietyMTMagnetic Particle Testing (Exam)MTBEMethyl Tertiary Butyl EtherMTBFMean Time Between FailuresMTLMaterialMTOMaterial Take OffMTRMaterial Test ReportMTSMaterial Teleprocessing SystemMWMegawattMWGroundwater Monitoring WellMWMicrowaveMWOMaintenance Work OrderMWPMajor Work PhaseMxFMale by Female

NNNitrogenN/ANot ApplicableNACENational Association of Corrosion EngineersNBRNitrile-Butadiene/Nitrile of BunaN RubberNCCINon Contradictory Complimentary InformationNCRNon Conformance ReportNCUNational Currency UnitNDENon Destructive ExaminationNDENet Direct ExpenditureNECNational Electrical CodeNEINuclear Energy InstituteNEMANational Electrical Manufacturers AssociationNESCNational Electric Safety CodeNEXTNear End Cross TalkNFPANational Fire Protection AssociationNGNatural GasNG-BUENon Gaussian Best Unbiased EstimateNGLNatural Gas LiquidsNGLCNatural Gas Liquids CentreNHANational Hydrogen AssociationNINickelNIPPNippleNIRNear InfraredNMCNetwork Maintenance CentreNOABLNational Wind Speed DatabaseNOCNational Oil CompanyNOCCNetworks Operations Control CentreNOCCNetwork Operations Control CentreNPLNeutral Pressure LevelNPSNominal Pipe SizeNPSHNet Positive Suction HeadNPSHANet Positive Suction Head AvailableNPSHRNet Positive Suction Head RequiredNPTNational (Taper) Pipe ThreadNPVNet Present ValueNPVRNet Present Value RatioNRCNuclear Regulatory CommissionNRSNon-Rising SternNRTLNationally Recognised Testing LaboratoryNSFNational Sanitation FoundationNSSSNational Structural Steelwork SpecificationNTSNot to Scale

OO&GOil and GasO&ROverhaul and RepairOATOperational Availability TestOBEOpen Book EstimateOCIMFOil Companies International Marine ForumOCMAOil Companies Materials AssociationODOutside DiameterOGOEADOil and Gas Operations Exploration Applications DiOHOn Hand QuantityOHSOccupational Health and SafetyOIOOperational Investment OverheadOOOn Order QuantityOPECOrganisation of the Petroleum Exporting CountriesOPEXOperating ExpenditureORGANIGRAMOrganisational DiagramORIFOrificeOSOn StreamOSOppurtunity StudyOSOily SludgeOS&YOutside Screw and YokeOSBLOutside Battery LimitsOSHAOccupational Safety and Health AdministrationOSIOnstream InspectionOSPOil Supply Planning and SchedulingOTOrienting ToolOTKOil TankOTMOverturning MomentsOWOily WaterOWPOily Waste-Water PondOWPUOily Water Pre-seperator UnitOWSOily Water SewerOWSJOpen Web Steel Joist

PPOil and Oil ProductsP&ICPurchasing and Inventory ControlP&IDsProcess and Instrument DiagramsP/EPlanning EngineerP/EProject EngineerP/LPipe LinePAProcess AirPARAParagraphPATISPurchasing and Traffic Information SystemPAWPlasma Arc WeldingPBProcess BlockPBEPlain Both EndsPBMRPebble Bed Modular ReactorPCAPortland Cement AssociationPCBPrinted Circuit BoardPCCPowder Control CentrePCCIPower Capital Costs IndexPCIPrecast/Prestressed Concrete InstitutePCLProject Construction LeaderPCOSProject Completion SystemPCPTPiezocone PenetrometerPCSProject Completion SchedulePCSProcess Control SystemPDCPeak Daily ConsumptionPDMPrecedence Diagram MethodPDMSPetroleum Database Management SystemPDPPlasma Display PanelPDRPreliminary Design ReviewPDSPlant Design SystemPEPond EffluentPEPlain EndPEPolyethylenePELFEXTPower Sum Equal Level Far End Cross TalkPEMProject Execution ManualPEPProject Execution PlanPERTProgram Evaluation and Review TechniquesPESPower and Energy SocietyPESPotential Explosion SitePETROMINPetroleum and MineralPFPeak FactorPFAPerfluoro (Alkoxyalkane) CopolymerPFCParallel Flange ChannelPFCPredicted Final CostPFDProcess Flow DiagramPFRPeak Flow RatePGPurge GasPGAPeak Ground AccelerationPHCPeak Hourly ConsumptionP-IPressure ImpulsePIBProcess Interface BuildingPICIndicating Pressure ControllerPIPProcess Industry PractisePIPPipe in PipePIVPost Indicator ValvePLPlatePLCPower Line CarrierPLCProgrammable Logic ControllerPLEPlain Large EndPMProject ManagerPM&CProject Management and ConstructionPMCProject Management ConsultantPMCProject Management ContractPMIPositive Material IdentificationPMSDProject Materials Supply DepartmentPMSOProject Material Services OrganisationPMTProject Management TeamPOPushed OnPOPump OutPOPurchase OrderPOCPotentially Oil/Chemical ContaminatedPOEPlain One EndPOMPipeline Operations ModulePOOHPulled Out of HolePOSPoint of SupportPPProject ProposalPPPolypropylenePPBParts per BillionPPIPlastics Pipe InstitutePPMParts per MillionPRPurchase RequisitionPRPressure ReducerPRPipe RackPRE-FATPre-Factory Acceptance TestPRESSPressurePSPumping StationPSPipe SupportPSPressure SewerPSPrefeasibility StudyPSBPressure Seal BonnetPSEPlain Small EndPSEPlanning/Scheduling EngineerPSHAProbibalistic Seismic Hazard AnalysisPSIPounds per Square InchPSIAPounds per Square Inch AbsolutePSIAPounds per Square Inch AtmosphericPSIGPounds per Square Inch GaugePSNEXTPower Sum Near End Cross TalkPTPercolation TestPTLiquid Penetrant Testing (Exam)PTPump TrimsP-TPressure TemperaturePTAPurchasing Traffic and AccountingPTFEPoly Tetra Fluoro EthylenePTSPipe Tracking SystemPVPhotovoltaicPVCPoly Vinyl ChloridePVDPlant Vertical DatumPVDCPolyvinylidene ChloridePVDFPolyvinylidene FluoridepWPico WattPWPotable WaterPWProcess WaterPWACPresent Worth of Annual ChargesPWHTPost Weld Heat TreatmentPWIPower Water InjectionPZVPressure Safety Relief Valve

QQQuantityQAQuality AssuranceQAQuality AssessmentQAMQuality Assurance ManualQCQuality ControlQCRQuality Control RecordQRQualification RecordQRQuotation RequestQSQuantity Surveyor

RRRefrigerantsR&DResearch and DevelopmentR/PRequest for PurchaseRARoughness AverageRADRadiusRAMRandom Access MemoryRATRatingRCReimbursable CostRCReinforced ConcreteRCARequired Corrective ActionRCDDRegistered Communications Distribution DesignRCPReinforced Concrete PipeRCSRemote Console SoftwareRCSRemote Computer SystemRCSCReservoir Characterisation and Simulation ConferenRERenewable EnergyREARural Electric AdministrationREDReducer; ReducingREFReferenceREINFReinforcedREPRenewable Energy PlantREPADReinforcing PadREQDRequiredRERRupture Explosion RadiusREVRevisionRFRaised FaceRFIRadio Frequency InterferenceRFIRequest for InspectionRFQRequest for QuotationRFSUReady for Start UpRGRough GradeRHSRectangular Hollow SectionRIHRun In HoleRJRing JointRLRelief LineRLCCold Relief LineRLWWarm Relief LineRMRRock Mass RatingRORenewables ObligationROReverse OsmosisROMRead Only MemoryROTVRemotely Operated Towed VehicleROVRemotely Operated VehicleRPReduced PortRPMRevolutions per MinuteRPORestrained Push OnRSRising StemRSAResponsible Standardisation Agency RepresentativeRSCRadiation Safety CommitteeRSCRReeled Steel Catenary RiserRSORadiation Safety OfficerRTRadiographic Testing (Exam)RTDResistance Temperature DetectorRTFEReinforced TFERTFORenewable Transport Fuel ObligationRTMRiser Turret MooringRTPReinforced Thermosetting PlasticRTRPGlass Fibre Reinforced Thermotsetting Resin PipeRTSAReal Time Security AnalysisRTURemote Terminal UnitsRVLRestricted Vendor ListRWRaw WaterRWORain Water Outlet

SSASulphuric AcidSALMSingle Anchor Leg MooringSALSSingle Anchor Leg StorageSASOSaudi Arabian Standards OrganisationSATSite Acceptance TestSAWSubmerged Arc WeldingSBSSingle Buoy StorageSBSStyrene-Butadiene-StyreneSCSteam CondensateSCSub-ContractSCSanitary CodeSCASpent CausticSCADASupervisory Control And Data AcquisitionSCHScheduleSCISteel Construction InstituteSCPCSingle Channel Per CarrierSCSStructured Cabling SystemSDStorm DrainSDSanitary DrainageSDDSystem Design DocumentSDISteel Deck InstituteSDOFSingle Degree of FreedomSDRStandard Dimensional RatioSEIStructural Engineering InstituteSFSulphurSGSpecific GravitySGSShell Global SolutionsSHFSuper High FrequencySHSSquare Hollow SectionSISiliconSISystem InternationaleSIFStrength Increase FactorSIHSatelite Instrument HouseSILSafety Integrity LevelSISSupplier Information SystemSISSwedish Standards InstitutionSISSafety Instruction SheetSJISteel Joist InstituteSLRSSeismic Load Resisting SystemSMAWShielded Metal Arc WeldingSMESSuperconducting Magnetic Energy StorageSMFSystems Management FacilitySMHStandard ManhourSMLSSeamlessSMMStandard Method of MeasurementSMSSeafloor Massive SulphideSMYSSpecified Minimum Yield StrengthSOSlip OnSOSeal OilSOCSafe Operation CommitteeSOESequence of EventsSOLSockoletSOLASInternational Convention for Safety of Life at SeaSOWSour WaterSOWScope of WorkSPASpacerSPCStored Program ControlSPDTSingle Pole Double ThrowSPESociety of Petroleum EngineersSPESenior Project EngineerSPECSpecificationSPMSingle Point MooringSPMBSingle Point Mooring BuoysSPMTSelf Propelled Modular TransportSPOSlop OilSPPCRSteam Power Plant Control RoomSP-WDSpiral WoundSQSquareSRSewer (Storm)SRShort RadiusSRCSeismic Risk CategorySRDSoil Resistance to DrivingSROSenior Reactor OperatorSRSSafety Requirements SpecificationSSStainless SteelSSDSecurity and Safety DirectiveSSDSafety ShutdownSSLStructural Slab LevelSSPCSociety of Protective CoatingsSSPCSteel Structure Painting CouncilSSSVSubsurface Safety ValveSSVSurface Safety ValveSTSeatSTDStandardSTGSteam Turbine GeneratorSTLSteelSTMSteamSTOStock Oil TankSTPSolar Thermal PowerSTSStandard Telephone SystemSTUShock Transmission UnitsSUDStart Up DateSVCServiceSWSalt WaterSWSocket WeldSWASingle Wire ArmouredSWCCSaline Water Conversion CorporationSWDSalt Water DisposalSWGSwageSWLStatic Water LevelSWLSafe Working LoadSWMHSanitary Water ManholeSWSSanitary Waste SewerSWSSanitary Water SewerSWWSanitary Waste WaterSYM.Symmetrical

TT&CThreaded and CoupledT&GTongue and GrooveT&ITesting and InspectionT/CThermocoupleT/SWThreaded by SocketweldTANTangentTAPTrans Arabian PipelineTBBTelecommunications Bonding BackboneTBBIBCTelecommunications Bonding Backbone InterconnectinTBEThread Both EndsTBETechnical Bid EvaluationsTBMTunnel Boring MachineTDTotal DepthTDMTime Division MultiplexingTDMATime Division Multiple AccessTDMMTelecommunications Distribution Methods ManualTDSTotal Dissolved SolidsTEDFLOWFlow of Inspection and TestsTEGTri Ethylene GlycolTEGThermo-Electric GeneratorTELTetraethylleadTEMATubular Exchangers Manufacturers AssociationTEMPTemperatureTERTelecommunications Equipment RoomTFETetrafluoroethyleneTFLThrough Flow LineTFSTotal Field SupplyTHKThickTHRDThread, ThreadedTITitaniumTIGTungsten Inert Gas WeldingTKLSTurnkey LumpsumTLTrunk LineTLCTotal Landed CostTLEThread Large EndTLPTension Leg PlatformTLPTension Leg ProductionTLTTotal Lead TimeTMGTrans Mercator GridTMGBTelecommunications Main Grounding BusbarTMLTetramethylleadTMSTerminal Management SystemTOCTop of ConcreteTOEThread One EndTOGTop of GroutTOLThredoletTOPTop of PipeTOSTop of SteelTOSTop of SupportTOSTop of SlabTPTechnical ProposalTPTrial PitTPGThermo-Powered GeneratorTPVTrap Prime ValveTPWTempered WaterTQMTechnical Query MemorandomTRTelecommunications RoomTSEThread Small EndTSERTelecommunications Service EntranceTSUTechnical Support UnitTSYMTower Soft Yoke MooringT-TTangent to TangentTWTreated WaterTWThermowellsTYPTypical

UUUnitsU.N.OUnless Noted OtherwiseUAUtility AirUAVUnmanned Aerial VehicleUBUnion BonnetUBUniversal BeamUBCUniform Building CodeUCUniversal ColumnUCSUlitimate Compressive StrengthUDMUnified Dispersion ModelUELUpper Explosive LimitUFCUniform Fire CodeUFDUtility Flow DiagramUFLUpper Flammable LimitUGUndergroundUGSUnderground ServicesUHFUltra High FrequencyUHMWUltra High Molecular WeightULUnderwriter LaboratoriesULSUltimate Limit StateUMCUniform Mechanical CodeUNCUnified National Coarse ThreadUNDPUnited Nations Development ProgrammeUNEPUnited Nations Environment ProgrammeUNFUnified National Fine ThreadUNIDOUnited Nations Industrial Development OrganisationUNSUnified Numbering SystemUPSUninterruptable Power SupplyUSCGUnited States Coast GuardUSFBUltra Shallow Floor BeamUTUltrasonic Testing (Exam)UTMUniversal Transverse MercatorUVUltra VioletUWUtility Water

VVVerticalV/DVents and DrainsVACVolts Alternating CurrentVBValve BoxVCEVapour Cloud ExplosionVDCVolts Direct CurrentVFRVerification Finding ReportVGVent GasVHFVery High FrequencyVLCCVery Large Crude CarrierVODValves Operating DiagramVPVent PipeVPCVolts Per CellVTVisual Testing (Exam)VTVessel TrimVTRVent through Roof

WWWeightWWaterW/WithW/CWater Cement RatioW/OWithoutWARMWeekly Automatic Requisition of MaterialWBWelded BonnetWBSWork Breakdown StructureWCWater ColumnWCHWet Crude HandlingWDMWork Discussion MemorandomWEWeld EndWFTWet Film ThicknessWIPWork In ProgressWIPWater Injection PlantWIPWater Injection PumpWIPSWater Injection Pump StationWISPSWater Injection Supply Pump StationWMWaste ManagementWMSWork Management SystemWNWeld NeckWOWork OrderWOGWater, Oil, & GasWOLWeldoletWOSEPWater Oil SeperationWPWorking PointWPSWelding Proceedure SpecificationWRWeather ResistantWRCWelding Research CouncilWTWall ThicknessWT&HWater Tap and HoseWTPWater Treatment PlantWWWaste WaterWWPWorking Water Pressure

XXSExtra StrongXXSDouble Extra Strong