| TÜV NORD | 2014/68/EU Castings, Forgings,Ingots | 18.7.1991 | Certification Materials‘ Tables |
| AD-2000 W0/TRD100 Castings, Forgings,Ingots | | Certification |
| AMERICAN BUREAU OF SHIPPING | Castings | 23.6.1993 | Certification |
| Forgings, Ingots | | Certification |
| DET NORSKE VERITAS | Castings | 11.6.1993 | Certification |
| Forgings | 4.12.1992 | Certification |
| LLOYD’S REGISTER | Castings | 27.9.1993 | Certification |
| výkovky | 8.6.1993 | Certification |
| Production of Steel and Ingots | 16.9.2002 | Certification |
| BUREAU VERITAS | Castings | 29.11.1993 | Certification |
| Forgings, Ingots | | Certification |
| NIPPON KAIJI KYOKAI | Forgings | 17.7.2001 | Certification |
| KOREAN REGISTER OF SHIPPING | Ingots | 30.10.2014 | Certification |
| RUSSIAN MARITIME REGISTER OF SHIPPING | Forgings | 14.6.2018 | Certification |
| ČESKÉ DRÁHY | Castings, Forgings | 16.6.2003 | Certification |
| Machining, Gearing Production and Thermal Treatment |
| ITI | Forgings | 1996 | Certification |
