| |
| AFNOR |
Association
Française de Normalisation |
| ANSI
|
American
National Standard Institute |
| API |
American
Petrolem Institute |
| ASTM |
American
Society for Testing and Material |
| BSI |
British
Standard Institution |
| DIN |
Deutshes
Inbstitut für Normung |
| ISO |
Organisation
Internationale de Normalisation |
 |
| |