Know and Understand Your Piping System Prepared by USEFUL PIPING ABBREVIATIONS (1/3) A A A AL ANSI API ASSY ASTM Alarm Anchor Aluminum American National Standards Institute American Petroleum Institute Assembly American Society for Testing and Materials B B BB BBE BC BD BE BF BL BLDG BLE BOP B&S BSE BV BW Beveled Bolted Bonnet Bevel Both Ends Bolt Circle Blow Down Beveled End(s) Blind Flange Battery Limits Building Bevel Large End Bottom of Pipe Bell and Spigot Bevel Small End Ball Valve Butt-weld C CHKV CI CL COL COLS CONC COND CONN CORR CPLG CS CS CTRLV CWR CWS Check Valve Cast Iron Clearance Column Columns Concentric Condensate Connection Corrosion Coupling Carbon Steel Cast Steel Control Valve Cooling Water Return Cooling Water Supply D DA DF DIA DIM DISCH DR DW DWG DRWN Directional Anchor Drain Funnel Diameter Dimension Discharge Drain Dummy Weld Drawing Drawn E E ECC EL ELL ELEV EQUIP ERW EXCH EXIST East Eccentric Elevation Elbow Elevation Equipment Electric Resistance Welded Exchanger Existing F FBO FDN FE F/F FF FF FI FIC FIG FLR FL FOB FOT FR FRC FS FS FT FW Furnished By Others Foundation Flow Element Face-to-Face Flat Face Full Face Flow Indicator Flow Indicating Controller Figure Floor Flange Flat on Bottom Flat on Top Flow Recorder Flow Recording Controller Field Support Forged Steel Foot Field Weld G G GAL GALV GPH GPM GR GaV GIV Gauge Gallon(s) Galvanized Gallons Per Hour Gallons Per Minute Grade Gate Valve Globe Valve H HCV HDR HIC HLL HOR HP HR HTR HVAC HVY HYD Hand Control Valve Header Hand Indicating Controller High Liquid Level Horizontal High Pressure Hanger Rod Heater Heating, Ventilating, and Air Conditioning Heavy Hydraulic I IA IA IC ID IDD IET IGT IH IN INS INST INV IPS IS ISA ISO ISO IST Instrument Air Insulation (Anti-sweat) Insulation (Cold) Inside Diameter Inside Depth of Dish Electric Trace Glycol Trace Insulation (Heat Conservation) Inch(es) Insulate or Insulation Instrument(ation) Invert Elevation Iron Pipe Size Insulation Safety Instrumentation Society of America International Organization for Standardization Isometric Steam Trace Know and Understand Your Piping System Prepared by USEFUL PIPING ABBREVIATIONS (2/3) J JCT JS JT Junction Jack Screw Joint L L LA LAH LAL LBS LC LC LG LG LI LIC LLL LN LO LP LPG LPT LR LR LRC LS Level Level Alarm Level Alarm-High Level Alarm-Low Pounds Level Controller Lock Closed Level Gauge Level Glass Level Indicator Level Indicating Controller Low Liquid Level Line Lock Open Low Pressure Liquefied Petroleum Gas Low Point Level Recorder Long Radius Level Recording Controller Level Switch M mm M M&F MATL MAX MECH MFG MFR MI MIN MIN MISC MK MW MW millimeter Meter Male and Female Material Maximum Mechanical Manufacturing Manufacturer Malleable Iron Minimum Minute Miscellaneous Piece Mark Manway Miter Weld N N NC NEC NEG NIP NLL NO NO NOM NOZZ NPS NPSH NPT NTS North Normally Closed National Electric Code Negative Nipple Normal Liquid Level Normally Open Number Nominal Nozzle Nominal Pipe Size Net Positive Suction Head National Pipe Thread Not to Scale O OAL OD Overall Length Outside Diameter OH OPP OS&Y OVHD OWS Open Hearth Opposite Outside Screw and Yoke Overhead Oily Water Sewer P PA PA PC PCV PdRC PE PI PI PIC P&ID PLE PO POE POS PP PR PRC PS PSE PSI PSIA PSIG PSV PT Pipe Anchor Pressure Alarm Pressure Controller Pressure Control Valve Pressure Differential Recording Controller Plain End Point of Intersection Pressure Indicator Pressure Indicating Controller Piping and Instrument Diagram Plain Large End Pump Out Plain One End Positive Personnel Protection Pressure Recorder Pressure Recording Controller Pipe Support Plain Small End Pounds Per Square Inch Pounds Per Square Inch Absolute Pounds Per Square Inch Gage Pressure Safety Valve Point Q QTY QUAD QUAD Quantity Quadrant Quadruple R R REC’D RED REF REINF REQ’D REV REV RF RJ RPM RS RTJ Radius Received Reducer Reference Reinforce Required Reverse Revision Raised Face Ring-Type Joint Rotations Per Minute Rising Stem Ring Type Joint S S SC SCH SCRD SECT SH SMLS SO SO SOL SP South Sample Connection Schedule Screwed Section (SHT) Sheet Seamless Slip On Steam Out Sock-o-let Set Point Know and Understand Your Piping System Prepared by USEFUL PIPING ABBREVIATIONS (3/3) SP SPEC SQ SR STD STL STM SUCT SUPT SW SWG SWP SYS GR Specific Gravity Specification Square Short Radius Standard Steel Steam Suction Support Socket-Weld Swage Standard Working Pressure System T T TA Tan TBE TC TCV TE TEMP T&C T&G THRD TI TIC TLE TOC TOG TOL TOS TR TRC TSE T/T TW TW TYP Steam Trap Temperature Alarm Tangent Thread Both Ends Temperature Controller Temperature Control Valve Threaded End Temperature Thread and Coupled Tongue and Groove Thread Temperature Indicator Temperature Indicating Controller Thread Large End Top of Concrete Top of Grout Thread-o-let Top of Steel Temperature Recorder Temperature Recording Controller Thread Small End Tangent to Tangent Temperature Well Thermowell Typical U UA US Utility Air Utility Station V VA VA VB VC VERT VF VOL VS Valve Vent to Atmosphere Vortex Breaker Vitrified Clay Vertical Vent to Flare Volume Vent to Stack W w/ W WB WE WLD WN WOG WOL with West Welded Bonnet Weld End Weld Weld Neck Water, Oil, Gas Weld-o-let WT Weight X XH XS XXH XXS Extra Heavy Extra Strong Double Extra Heavy Double Extra Strong
