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AFNOR |
Association Française de Normalisation |  |
| AISI | American Iron and Steel Institute |  |
| ANSI | American National Standards Institute |  |
| API | American Petroleum Institute |  |
| ASME | American Society of Mechanical Engineers |  |
| ASTM | American Society of Testing Materials |  |
| AWWA | American Water Works Association |  |
| BSI | British Standards Institution |  |
| DIN | Deutsches
Institut für Normung (Deutsche Industrie Normen) |
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| FM | Factory Mutual |  |
| ISO | International Standardizing Organization |  |
| JIS | Japan Industrial Standard |  |
| MSS | Manufacturers Standardization Society for the Valve and Fitting Industry |  |
| NACE | National Association of Corrosion Engineers |  |
| UL | Underwriters Laboratory |  |
| UNS | Unified Numbering System |  |
