| ANSI | American National Standards |
| ASME | American Society of mechanical Engineers |
| ISO | International Organization for Standardization |
| MSS | Manufacturers Standardization Society of the Valve and Fitting |
| ASTM | American Society for Testing Materials |
| API | American Petroleum Institute |
| ASA | American Supply Association |
| ISA | International Society of Automation |
| OCIMF | Oil Companies International Marine Forum |
| DIN | Detaches Institute fur No |
| NACE | National Association of Catering Executives |
| PPI | Plastic Pipe Institute |
| AWS | American Welding Society |
| AWWA | American Water Works Society |
| ASHRAE | American Society Heating and Refrigerant Engineering |
| IPS | Iranian Petroleum Standard |
| AISI | American Iron and Steel Standard |
| IGS | Iranian Gas Standard |
| BS | British Standard |
| NFPA | National Fire Protection Association |
| PEI | Petroleum Equipment Institute |
| IALA | International Association of Marine Aids to Navigation and Lighthouse Authorities |
