Oil and Gas Acronyms You Should Know

Oil and Gas Acronyms You Should Know

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Every Piping Designer has encountered an acronym that was new to them.  Next, you're looking for acronym's on the internet, and the various internet acronym websites just aren't finding your oil and gas industry specific acronym.  We've all been there many times, so let me save you some hassle, and give you most of the terms in one location:

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

A

  • ABS (Absolute Pressure)
  • AC (Air to Close)
  • AC (Air Conditioner)
  • AC (Alternating Current)
  • A/G (Above Ground)
  • AO (Air to Open)
  • A/S (Air Supply)
  • ATM (Atmosphere)

B

  • BBE (Bevel Both Ends)
  • BBL (Barrel)
  • BD (Blowdown)
  • BDV (Blowdown Valve)
  • BL (Battery Limit)
  • BLE (Bevel Large End)
  • BOE (Bevel One End)
  • BOF (Bottom of Face of Flange)
  • BOM (Bill of Material)
  • BOP (Bottom of Pipe)
  • BOT (Bottom of Tray)
  • BPCS (Basic Plant Control System)
  • BSE (Bevel Small End)
  • BTU (British Thermal Unit)

C

  • CAP (Capacity)
  • CC (Corrosion Coupon)
  • CFM (Cubic Feet per Minute)
  • CHD (Closed Hydrocarbon Drain)
  • CHO (Chain Operated)
  • CGD (Closed Glycol Drain)
  • C/L (Centerline)
  • CO (Clean Out)
  • CO (Chain Operated)
  • CONC (Concentric)
  • CONN (Connection)
  • CS (Carbon Steel)
  • CSC (Car Seal Closed)
  • CSO (Car Seal Open)
  • CWP (Construction Work Package)

D

  • DBB (Double Block & Bleed)
  • DBM (Design Basis Memoranda)
  • DIA (Diameter)
  • D/P (Differential Pressure)
  • DP (Design Pressure)
  • DT (Design Temperature)
  • DWG (Drawing)

E

  • ECC (Eccentric)
  • EL (Elevation)
  • ELL (Elbow)
  • EOL (Elbow-let)
  • EOP (End of Pipe)
  • EPC (Engineering, Procurement and Construction)
  • EPCC (Engineering, Procurement, Construction and Commissioning)
  • EPCM (Engineering, Procurement and Construction Management)
  • ESD (Emergency Shutdown)
  • ESDV (Emergency Shutdown Valve)
  • EWP (Engineered Work Package)
  • ET (Electrically Traced)

F

  • F2F (Face to Face)
  • F&G (Fire & Gas)
  • FC (Fail Close)
  • FEED (Front End Engineering & Design)
  • FF (Flat Face)
  • F/F (Face to Face)
  • F/G (Fuel Gas)
  • FI (Fail Indeterminate)
  • FL (Fail in Last Position)
  • FLG (Flange)
  • FNPT (Female Nominal Pipe Threads)
  • FO (Fail Open)
  • FOB (Flat on Bottom)
  • FOF (Face of Flange)
  • FOT (Flat on Top)
  • FP (Full Port)
  • FS (Forged Steel)
  • FV (Full Vacuum)

G

  • GA (General Arrangement)
  • GO (Gear Operated)
  • GPM (Gallons Per Minute)
  • GR (Grade)
  • GT (Glycol Traced)

H

  • HLL (High Liquid Level)
  • HOA (Hand Off Automatic)
  • HP (High Pressure)
  • HPV (Hight Point Vent)

I

  • I (Interlock)
  • I/A (Instrument Air)
  • ID (Inside Diameter)
  • IFA (Issued for Approval)
  • IFB (Issued for Bid)
  • IFC (Issued for Construction)
  • IFD (Issued for Design)
  • IFH (Issued for Hazop)
  • IFI (Issued for Information)
  • IFR (Issued for Review)
  • I/G (Instrument Gas)
  • I/P (Current / Pressure Transducer)
  • ISO (Isometric)

L

  • LC (Locked Closed)
  • LEL (Lower Explosive Limit)
  • LLH (Liquid Level High)
  • LLHH  (Liquid Level High High)
  • LLL (Liquid Level Low)
  • LLLL (Liquid Level Low Low)
  • LO (Locked Open)
  • LP (Low Pressure)
  • LPD (Low Point Drain)
  • LPM (Litres Per Minute)
  • LR (Long Radius)

M

  • MMSCFD (Million Standard Cubic Feet per Day)
  • MNPT (Male Nominal Pipe Threads)
  • MTO (Material Take Off)
  • MW (Manway)

N

  • NC (Normally Closed)
  • NLL (Normal Liquid Level)
  • NNF (Normally No Flow)
  • NO (Normally Open)
  • NPS (Nominal Pipe Size)
  • NPT (Nominal Pipe Thread)

O

  • OD (Outside Diameter)
  • OOS (Out of Service)
  • O/S (Outside Building)
  • O/H (Overhead)

P

  • PBE (Plain Both Ends)
  • PFD (Process Flow Diagram)
  • PG (Purge Connection)
  • pH (Acid Concentration)
  • PID / P&ID (Piping and Instrumentation Diagram)
  • PLC (Programmable Logic Controller)
  • PLE (Plain Large End)
  • PLN (Plot Plan)
  • PO (Pump Out)
  • POE (Plain One End)
  • PP or PIP (Piping Plan)
  • PSE (Plain Small End)
  • PSV (Pressure Safety Valve)
  • PWHT (Post Weld Heat Treated)

Q

  • Q (Totalizing)

R

  • RED (Reducer)
  • REF (Reference)
  • RF (Raised Face)
  • RFWN (Raised Face Welded Neck)
  • RFI (Request for Information)
  • RSP (Removable Spool Piece)
  • RT (Reducing Tee)
  • RTJ (Ring Type Joint)

S

  • S (Straight Thru - Diaphram Valve)
  • SC (Sample Connection)
  • SD (Shutdown - Individual Equipment)
  • SMLS (Seamless)
  • SOL (Sock-o-let)
  • SP (Set Point)
  • SR (Stress Relieve)
  • SR (Short Radius)
  • SS (Stainless Steel)
  • S/S (Seam to Seam)
  • ST (Steam Traced)
  • STD (Standard)
  • SW (Socket Welded)

T

  • TBE (Threaded Both Ends)
  • TLE (Threaded Large End)
  • TSE (Threaded Small End)
  • TL (Tangent Line)
  • TOE (Threaded One End)
  • TOL (Thread-o-let)
  • TOP (Top of Pipe/Top of Pile)
  • TOS (Top of Steel)
  • T/T (Tangent to Tangent)
  • TYP (Typical)

U

  • U/G (Underground)
  • USGPM (US Gallons Per Minute)

W

  • WN (Weld Neck)
  • WOG (Water, Oil, and Gas)
  • WOL (Weld-o-let)