Piping and Valve Abbreviations A-20 Alloy 20 Stainless Steel ADAPT Adapter AL Aluminum AR1 Arrangement No. 1 (Multi-Port Valves) ASB Asbestos B7 Alloy Bolt - Identification Symbol BB Bolted Bonnet BBE Beveled Both Ends BDY Body BE Beveled End BFW Beveled For Welding or Boiler Feed Water BLE Beveled Large End BOE Beveled One End I see BR-I BR Red Brass BR-I Brass to Iron Seats BRZ Bronze BS Bellows Seal BSE Beveled Small End BTD Bolted BTFLY Butterfly BW Butt Weld CA Corrosion Allowance CAT Category CD Cadmium CEM LND Cement Lined CI Cast Iron CL Class (ANSI) CLASS Classification COMP Composition (Gaskets) or Compression (Tubing) CONC Concentric CONN Connection (Piping) or Connector (Tubing) CPLG Coupling CPVC Chlorinated Polyvinyl Chloride CR Chrominum (as in 12 Cr) CS Carbon Steel CS/LT Carbon Steel Low Temperature CTE Coal-Tar Enamel CU Copper DEG Degree DFT Dry Film Thickness (Coatings) DI Ductile Iron DRKG Drinking DWG Drawing ECC Eccentric EFW Electric Fusion Welded ELL Elbow EP Extruded Plastic (OCT Preferred) ERW Electric Resistance Welded F Fahrenheit F/D Faced and Drilled FBE Fusion Bonded Epoxy FEM Female FF Flat Face (also PF) (Material) FLG Flange FLGD Flanged FOE Female One End FP Full Port FPS Feet Per Second FRE Fiberglass Reinforced Epoxy FRP Fiberglass Reinforced Plastic FS Fire Safe GALV Galvanized GASK Gasket GO Gear Operator (or Gear Manual Actuator) GRAPH Graphite GRNWD Greenwood GS Grease Seal HC Hydrocarbon HD Head HDPE High Density Polyethylene HEX Hexagon IBBT Iron Body, Brass Trim ID Inside Diameter IN. Inch INR RNG Inner Ring INSTR Instrument IS Inside Screw ISUB Inside Screw Union Bonnet JKTD Jacketed JT Joint LB Pound LFT Lift LJ Lap Joint LND Lined LPG Liquified Petroleum Gas LR Long Radius LT Low Temperature (Piping) MACH Machine MAX Maximum MF Male-Female MI Malleable Iron MIN Minimum MOE Male One End MON Monel NIPL Nipple (Piping) NOM Nominal NPS Nominal Pipe Size NPT National Pipe Taper (Pipe Threads) NRS Non Rising Stem OCT Octagonal ORIF Orifice ORJ Octagonal Ring Joint (FLG Face) ORJ Octagonal/Oval Ring Gasket OS & Y Outside Screw and Yoke PAT Pattern PB Polybutylene PBE Plain Both Ends PE Plain End (Piping) Polyethylene PF Plain Face (Also FF) PLE Plain Large End PLTD Plated POE Plain One End PP Polypropylene PSE Plain Small End PSIG Pounds Per Square Inch Gauge PVC Polyvinylchloride PVDF Polyvinylidene Fluoride RECL Reclaimed RED Reducer or Reducing REG Regular RF Raised Face RJ Ring Joint RP Reduced Port RS Rising Stem RUB Rubber SCH Schedule SCRD Screwed (Threaded) SG Small Groove SHRT Short SHT Sheet (Gaskets) SMLS Seamless SMT Small Tongue SO Slip-On SOM Somastic SPCL Special Spiral Wound (Gasket Style) SR Short Radius SS Stainless Steel ST & G Small Tongue and Groove STD WT Standard Weight STEL Stellite STL Steel STRT Straight SW Socketweld (Fitting-end Conn.) SWG Swage (Piping) SWNG Swing T & C Threaded and Coupled TBE Threaded Both Ends TBG Tubing TE Threaded Ends TEF Teflon TEMP Temperature TLE Threaded Large End TOE Threaded One End TR Trim TSE Threaded Small End UB Union Bonnet UTIL Utilities VLV Valve VP Vapor Pressure W Wall (as in .049w) W/ With W/2 With Two WAF Wafer (Valve Type) WAF-L Wafer-Lug (Valve Type) WELD Welded WN Weldneck WND Wound WROT Wrought WT Weight XS or XH Extra Strong Wall Thickness XXS or XXH Double Extra Strong Wall Thickness Y Y-Pattern (Valves)