| 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, Ingots | 23.6.1993 | Certification |
| Forgings | 23.6.1993 | Certification |
| DET NORSKE VERITAS | Castings | 11.6.1993 | Certification |
| Forgings | 4.12.1992 | Certification |
| LLOYD’S REGISTER | Castings | 27.9.1993 | Certification |
| Forgings | 8.6.1993 | Certification |
| Production of Steel and Ingots | 16.9.2002 | Certification |
| BUREAU VERITAS | Castings | 29.11.1993 | Certification |
| Forgings, Ingots | | Certification |
| RINA | Forgings, Ingots | 11.6.2003 | Certification |
| KOREAN REGISTER OF SHIPPING | Ingots | 30.10.2014 | Certification |
| RUSSIAN MARITIME REGISTER OF SHIPPING | Castings, Forgings | 14.6.2018 | Certification |
| ČESKÉ DRÁHY | Castings, Forgings | 16.6.2003 | Certification |
| Machining, Gearing Production and Thermal Treatment |
| ŠKODA JS | Forgings | 21.10.2021 | Certification |
| ČEZ, a.s. | Metallurgical and Engineering Products | 1.4.2022 | Certification |
