Here’s an list of engineering abbreviations
1. General Engineering Abbreviations
- AC – Alternating Current
- DC – Direct Current
- V – Volts
- W – Watts
- Hz – Hertz
- Ω – Ohms
- kW – Kilowatt
- MW – Megawatt
- kVA – Kilovolt-Amperes
- RPM – Revolutions Per Minute
2. Mechanical & Structural Engineering
- ASME – American Society of Mechanical Engineers
- CRCA – Cold Rolled Cold Annealed
- CS – Carbon Steel
- SS – Stainless Steel
- RCC – Reinforced Cement Concrete
- PMS – Piping Material Specification
- GA – General Arrangement
- ANSI – American National Standards Institute
- API – American Petroleum Institute
- NACE – National Association of Corrosion Engineers
3. Electrical & Electronics Engineering
- LED – Light Emitting Diode
- UPS – Uninterrupted Power Supply
- IP – Ingress Protection
- PLC – Programmable Logic Controller
- VFD – Variable Frequency Drive
- SCADA – Supervisory Control and Data Acquisition
- PCB – Printed Circuit Board
- DCS – Distributed Control System
- RTU – Remote Terminal Unit
4. Process & Chemical Engineering
- P&ID – Piping and Instrumentation Diagram
- PFD – Process Flow Diagram
- MSDS – Material Safety Data Sheet (Now SDS – Safety Data Sheet)
- LOPA – Layer of Protection Analysis
- HAZOP – Hazard and Operability Study
- HAZID – Hazard Identification
- SIL – Safety Integrity Level
- QRA – Quantitative Risk Assessment
- NFPA – National Fire Protection Association
- FM – Factory Mutual
- BPCS – Basic Process Control System
- CCPS – Center for Chemical Process Safety
- HSE – Health, Safety, and Environment
- MOC – Management of Change
- MTBF – Mean Time Between Failures
- MTTR – Mean Time To Repair
- PSM – Process Safety Management
- PTW – Permit to Work
- RBI – Risk-Based Inspection
5. Process Safety & Loss Prevention Engineering
- F&G – Fire and Gas
- LPCB – Loss Prevention Certification Board
- NOAEL – No Observable Adverse Effect Level
- LOAEL – Lowest Observable Adverse Effect Level
- TAC – Tariff Advisory Committee
- PESO – Petroleum and Explosives Safety Organization
- UL – Underwriters Laboratory
- ALARP – As Low As Reasonably Practicable
- BLEVE – Boiling Liquid Expanding Vapor Explosion
- CFD – Computational Fluid Dynamics
- EERA – Escape, Evacuation, and Rescue Analysis
- FAT – Factory Acceptance Test
- HFA – Human Factors Assessment
- ISA – International Society of Automation
- JET FIRE – High-Velocity Jet Fire Scenario
- LFL – Lower Flammable Limit
- UFL – Upper Flammable Limit
- MEID – Major Equipment Identification Document
- PHA – Process Hazard Analysis
- RMP – Risk Management Plan
- SCE – Safety Critical Equipment
- SIF – Safety Instrumented Function
- SIS – Safety Instrumented System
- TR – Temporary Refuge
- VCE – Vapor Cloud Explosion
6. Oil & Gas, Petrochemicals, and Refining Abbreviations
A. Exploration & Production (Upstream)
- BOP – Blowout Preventer
- FPSO – Floating Production, Storage, and Offloading Unit
- LNG – Liquefied Natural Gas
- LPG – Liquefied Petroleum Gas
- MPD – Managed Pressure Drilling
- MWD – Measurement While Drilling
- OWS – Oil Water Separator
- SPM – Single Point Mooring
- TD – Total Depth
- TVD – True Vertical Depth
- WI – Water Injection
B. Refining & Processing (Midstream & Downstream)
- CDU – Crude Distillation Unit
- FCC – Fluid Catalytic Cracking
- HCN – Hydrocarbon
- HCU – Hydrocracking Unit
- ISBL – Inside Battery Limits
- OSBL – Outside Battery Limits
- MDEA – Methyl Diethanolamine (Used in Gas Sweetening)
- NGL – Natural Gas Liquids
- ROG – Refinery Off-Gas
- SRU – Sulfur Recovery Unit
- TGTU – Tail Gas Treating Unit
C. Pipelines & Transport
- AG – Above Ground (Pipeline)
- BG – Below Ground (Pipeline)
- CUI – Corrosion Under Insulation
- ERW – Electric Resistance Welded (Pipe)
- HIC – Hydrogen Induced Cracking
- ICDA – Internal Corrosion Direct Assessment
- PIG – Pipeline Inspection Gauge
- PSV – Pressure Safety Valve
- RTJ – Ring Type Joint
- SCV – Safety Control Valve
- SDV – Shutdown Valve
