| Classification society |
| C.C.S. |
China Classification Society |
| A.B.S |
American Bureau of Shipping |
| B.V |
Bureau Veritas |
| DNV |
Det Norske Veritas |
| GL. |
Germanischer Lloyd |
| KR |
Korean Register of Shipping |
| LR |
Lloyd's Register of Shipping |
| N.K. |
Nippon Kaiji Kyokai |
| R.I.N.A |
Registro Italiano Navale |
| PRS |
Polish Register of Shipping |
| RS |
Russian Maritime Register of Shipping |
| GB |
Mandatory Chinese national standards |
| GB/T |
Recommended Chinese National Standard |
| EN |
European Normalization |
| DIN |
Deutsches Institute fur Normung |
| BS |
British Standard Institution |
| ASTM |
American Society for Testing and Materials |
| ASME |
American Society of Mechanical Engineers |
| ISO |
International Organization for Standardization |
| JIS |
Japanese Industrial Standards |
