October 1998

Process Industry PracticesPiping

PIP PNG00002Abbreviated Piping Terms and Acronyms

PURPOSE AND USE OF PROCESS INDUSTRY PRACTICES

In an effort to minimize the cost of process industry facilities, this Practice hasbeen prepared from the technical requirements in the existing standards of majorindustrial users, contractors, or standards organizations. By harmonizing thesetechnical requirements into a single set of Practices, administrative, application, andengineering costs to both the purchaser and the manufacturer should be reduced. Whilethis Practice is expected to incorporate the majority of requirements of most users,individual applications may involve requirements that will be appended to and takeprecedence over this Practice. Determinations concerning fitness for purpose andparticular matters or application of the Practice to particular project or engineeringsituations should not be made solely on information contained in these materials. Theuse of trade names from time to time should not be viewed as an expression ofpreference but rather recognized as normal usage in the trade. Other brands having thesame specifications are equally correct and may be substituted for those named. Allpractices or guidelines are intended to be consistent with applicable laws andregulations including OSHA requirements. To the extent these practices or guidelinesshould conflict with OSHA or other applicable laws or regulations, such laws orregulations must be followed. Consult an appropriate professional before applying oracting on any material contained in or suggested by the Practice.

Process Industry Practices (PIP), Construction Industry Institute, The University ofTexas at Austin, 3208 Red River Street, Suite 300, Austin, Texas 78705. PIPmember companies may copy this practice for their internal use.

Not printed with state funds.

October 1998

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Process Industry PracticesPiping

PIP PNG00002Abbreviated Piping Terms and Acronyms

Table of Contents

1. Introduction ...............................21.1 Purpose.............................................21.2 Scope ................................................2

2. General.......................................23. Abbreviated Piping Terms

and Acronyms ...........................3

PIP PNG00002 October 1998Abbreviated Piping Terms and Acronyms

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1. Introduction

1.1 PurposeThe purpose of this Practice is to provide a system for identifying abbreviated pipingterms and acronyms used in Process Industry Practices (PIP) piping documents.

1.2 ScopeThis Practice establishes the definitions and interpretations for all piping-relatedabbreviations and acronyms used in PIP piping documents and drawings.Abbreviations for technical societies, codes, standards, etc. are not included.

2. General

2.1 Certain abbreviations and interpretations are unique to a particular discipline orcontext in which they are used. The abbreviations listed in this Practice areconsidered piping-related and may be used in piping documents and drawingswithout further definition in those documents or drawings.

2.2 Abbreviations not listed in this document must be spelled out or defined in thedocument/drawing in which they are used. Other abbreviations may be defined asdescribed in Section 2.3.

2.3 When first used in the text of a document/drawing, other terms to be abbreviatedshall be spelled out and followed by the abbreviation in parentheses, e.g.,arrangement (ARRGT). Thereafter, the abbreviation alone may be used in thatdocument/drawing.

2.4 To determine the appropriate abbreviation for a piping term or the interpretation of apiping abbreviation used in a PIP piping document, refer to this Practice.

2.5 In cases where an abbreviation listed in this Practice conflicts with otherinterpretations or where multiple interpretations exist, the abbreviations andinterpretations of this Practice shall apply.

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3. Abbreviated Piping Terms and Acronyms

Abbrevi-ation

Description Abbrevi-ation

Description

AARH Arithmetic Average Roughness Height EA EachAL Aluminum EB Extended BonnetATM Atmosphere EC Eddy Current Testing (Examination)AVG Average ECC EccentricB&S Bell & Spigot EFW Electric Fusion WeldedBB Bolted Bonnet EL ElevationBBE Bevel Both Ends ELL ElbowBC Bolt Circle ELLIP EllipticalBD Blow Down EOL ElboletBE Beveled End EPDM Ethylene-Propylene-Diene Terpolymer / EP RubberBF Blind Flange EQ EqualBL Battery Limit ERW Electric Resistance WeldedBLD Blind F FahrenheitBLE Bevel Large End F-F Face to FaceBOE Bevel One End FBE Flange Both EndsBOM Bill of Material FCAW Flux Cored Arc WeldingBOP Bottom of Pipe FEP Perfluoro (Ethylene-Propylene) CopolymerBR Bronze FF Flat FaceBSE Bevel Small End FFW Field Fit WeldBTM Bottom FIG FigureBW Butt Weld FIN FinishC Centigrade; Celsius FLE Flange Large EndC-C Center to Center FLEX FlexibleCA Corrosion Allowance FLG FlangeCALC Calculated FMU Fitting Make UpCI Cast Iron FNPT Female National (Taper) Pipe ThreadsCL Centerline FOB Flat on BottomCM Centimeter FOE Flange One EndCONC Concentric FOF Face of FlangeCONN Connection FOT Flat on TopCPLG Coupling FP Full PortCPVC Chlorinated Polyvinyl Chloride FRP Fiberglass Reinforced PlasticCR Chromium FS Forged SteelCS Carbon Steel FSE Flange Small EndCU Copper FT Foot; FeetCWO Chain Wheel Operator FTG FittingCWP Cold Working Pressure FV Full VacuumDEG Degree FW Field WeldD/P Differential Pressure G GramDI Ductile Iron GA GaugeDIA Diameter GALV GalvanizedDIM Dimension GBE Groove Both EndsDIN Deutsche Indistrie Normen GE Groove EndDN Diameter Nominal (Metric) GJ Ground JointDP Design Pressure GLE Groove Large EndDRN Drain GMAW Gas Metal Arc WeldingDT Design Temperature GO Gear OperatorDWG Drawing GOE Groove One End

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Abbrevi-ation

Description Abbrevi-ation

Description

GR Grade MIN MinimumGRND Ground(ed) MISC MiscellaneousGRP Glass Reinforced Plastic MJ Mechanical JointGSE Groove Small End MNPT Male National (Taper) Pipe ThreadsGSKT Gasket MO MolybdenumGTAW Gas Tungsten Arc Welding MT Magnetic Particle Testing (Examination)H Horizontal MTL MaterialHAZ Heat Affected Zone MTO Material Take OffHB Hardness Brinell Scale MTR Material Test ReportHD Head N/A Not ApplicableHDPE High Density Polyethylene NBR Nitrile-Butadiene/Nitrile or BunaN RubberHDR Header NI NickelHEX Hexagonal NIPP NippleHF Hard Faced NPS Nominal Pipe SizeHK Hardness Knoop Scale NPT National (Taper) Pipe ThreadHP High Pressure NRS Non-Rising StemHPT High Point NTS Not To ScaleHR15N Hardness Rockwell 15N Scale OD Outside DiameterHRB Hardness Rockwell B Scale ORIF OrificeHRC Hardness Rockwell C Scale OS&Y Outside Screw & YokeHT Heat Treatment OSBL Outside Battery LimitsHV Hardness Vickers Scale P&ID Piping and Instrumentation DiagramHW Handwheel P-T Pressure TemperatureIBBM Iron Body Bronze Mounted PARA ParagraphID Inside Diameter PAW Plasma Arc WeldingIN Inch PBE Plain Both EndsINS Insulation PE Polyethylene; Plain EndISBL Inside Battery Limits PFA Perfluoro (Alkoxyalkane) copolymerISO Isometric Drawing PIV Post Indicator ValveISRS Inside Screw Rising Stem PL PlateITCS Impact Tested Carbon Steel PLE Plain Large EndJE Joint Efficiency PO Pushed OnKCS Killed Carbon Steel POE Plain One EndKG Kilogram POS Point of SupportKPA Kilopascals (Pressure = psig x 6.895) PP PolypropyleneLDPE Low Density Polyethylene PPB Parts Per BillionLJ Lap Joint PPM Parts Per MillionLP Low Pressure PRESS PressureLPG Liquefied Petroleum Gas PS Pipe SupportLPT Low Point PSE Plain Small EndLR Long Radius PSI Pounds per Square InchLTE Long Tangent Elbow PSIA Pounds per Square Inch AbsoluteLWN Long Welding Neck PSIG Pounds per Square Inch GaugeM Meter PT Liquid Penetrant Testing (Examination)MxF Male by Female PTFE PolytetrafluoroethyleneMAWP Maximum Allowable Working Pressure PVC Polyvinyl ChlorideMAX Maximum PVDC Polyvinylidene ChlorideMDMT Minimum Design Metal Temperature PVDF Polyvinylidene FluorideMFG Manufacturer PWHT Postweld Heat TreatmentMI Malleable Iron RA Roughness Average (Replaced AARH)

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Abbrevi-ation

Description Abbrevi-ation

Description

RAD Radius T-T Tangent to TangentRAT Rating T/SW Threaded by SocketweldRED Reducer; Reducing TAN TangentREF Reference TBE Thread Both EndsREINF Reinforced TEMP TemperatureREPAD Reinforcing Pad TFE TetrafluoroethyleneREQD Required THK ThickREV Revision THRD Thread; ThreadedRF Raised Face TI TitaniumRJ Ring Joint TLE Thread Large EndRP Reduced Port TOC Top of ConcreteRPO Restrained Push On TOE Thread One EndRS Rising Stem TOG Top of GroutRT Radiographic Testing (Examination) TOL ThredoletRTFE Reinforced TFE TOP Top of PipeRTP Reinforced Thermosetting Plastic TOS Top of Steel; Top of SupportRTR Reinforced Thermoset Resin TSE Thread Small EndSAW Submerged Arc Welding TW ThermowellSCH Schedule TYP TypicalSDR Standard Dimensional Ratio UB Union BonnetSG Specific Gravity UG UndergroundSI Silicon UNC Unified National Coarse ThreadSMAW Shielded Metal Arc Welding UNF Unified National Fine ThreadSMLS Seamless UNS Unified Numbering SystemSO Slip On UT Ultrasonic Testing (Examination)SOCW Socket Weld (see SW) V VerticalSOL Sockolet V/D Vents and DrainsSP-WD Spiral Wound VT Visual Testing (Examination)SPA Spacer W/ WithSPEC Specification W/O WithoutSQ Square WB Welded BonnetSR Short Radius WE Weld EndSS Stainless Steel WN Weld NeckST Seat WOG Water, Oil & GasSTD Standard WOL WeldoletSTL Steel WP Working PointSTM Steam WPS Weld Procedure SpecificationSVC Service WT Wall ThicknessSW Socket Weld (preferred) WWP Working Water PressureSWG Swage XS Extra StrongT&C Threaded and Coupled XXS Double Extra StrongT&G Tongue and Groove