For definitions, please see Glossary.
| ACP | Area Contingency Plan |
| ANSI | American National Standards Institute |
| API | American Petroleum Institute |
| AOPL | Association of Oil Pipelines |
| ASME | American Society of Mechanical Engineers |
| ASSP | American Society of Safety Professionals |
| ASTM | American Society for Testing & Materials |
| atm | Atmospheric Pressure |
| BLM | Bureau of Land Management |
| BOEM | Bureau of Ocean Energy Management |
| Btu | British Thermal Unit |
| CAN | Community Awareness Network(s) |
| CATS | Community Assistance and Technical Services |
| CFR | Code of Federal Regulations |
| CGA | Common Ground Alliance |
| CNG | Compressed Natural Gas |
| CGL | Compressed Gas Liquids |
| CP | Cathodic Protection |
| CPM | Computation Pipeline Monitoring |
| DHS | U.S. Department of Homeland Security |
| DIMP | Gas Distribution Integrity Management Program |
| DIRT | Damage Information Reporting Tool |
| DOD | U.S. Department of Defense |
| DOE | U.S. Department of Energy |
| DOI | U.S. Department of Interior |
| DOT | U.S. Department of Transportation |
| EIA | U.S. Energy Information Administration |
| ESA | Environmentally or Ecologically Significant Area(s) |
| FERC | Federal Energy Regulatory Commission |
| FRP | Facility Response Plan |
| g | Standard Acceleration of Gravity |
| GAO | Government Accountability Office |
| GTI | Gas Technology Institute |
| HCA | High Consequence Area |
| HVL | Highly Volatile Liquid |
| IBR | Incorporated By Reference |
| ILI | In-Line Inspection |
| ILO | International Labour Organization |
| IM | Integrity Management |
| INGAA | Interstate Natural Gas Association of America |
| ISO | International Organization for Standardization |
| kPa | Kilopascal |
| LEPC | Local Emergency Planning Committee |
| LNG | Liquefied Natural Gas |
| MAOP | Maximum Allowable Operating Pressure |
| Mcf | Thousands of Cubic Feet |
| MMcf | Millions of Cubic Feet |
| MOP | Maximum Operating Pressure |
| MSS | Manufacturer’s Standardization (Society of Valve & Fittings) |
| NACE | National Association of Corrosion Engineers |
| NAPSR | National Association of Pipeline Safety Representatives |
| NARUC | National Association of Regulatory Utility Commissioners |
| NCP | National Contingency Plan |
| NEPA | National Environmental Policy Act |
| NFPA | National Fire Protection Association |
| NIMBY | Not in My Back Yard |
| NIST | National Institute of Standards & Technology |
| NTSB | National Transportation Safety Board |
| OCS | On-Scene Coordinator |
| OPS | Office of Pipeline Safety |
| OSHA | Occupational Safety and Health Association |
| PE | Polyethylene |
| PHMSA | Pipeline and Hazardous Materials and Safety Administration |
| PIPA | Pipelines and Informed Planning Alliance |
| PIR | Potential Impact Radius |
| PPI | Plastics Pipe Institute |
| PRCI | Pipeline Research Council International |
| psi | Pounds per Square Inch |
| psia | Pounds per Square Inch Absolute |
| PSC | Public Service Commission |
| PST | Pipeline Safety Trust |
| PUC | Public Utility Commission |
| SCADA | Supervisory Control and Data Acquisition System |
| SCC | Stress Corrosion Cracking |
| SI | International System of Units |
| SMYS | Specified Minimum Yield Strength |
| SPCC | Spill Prevention, Control, and Countermeasure Plan |
| SWPA | Source Water Protection Area |
| ROW | Right(s)-of-Way |
| USA | Unusually Sensitive Area |
| Tcf | Trillions of Cubic Feet |
| TERC | Transportation Environmental Resource Center |
| TSA | Transportation Safety Administration |
| USA | Unusually Sensitive Area |
| USACE | U.S. Army Corps of Engineers |
| UTC | Utility Trade Commission |