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ABS - American Bureau of Shipping

Krefeld - Forging Facility and Process Approval

[GB]

Witten - Foundry Facility and Process Approval

[GB]

Witten - Rolled Bars - Machinery, Facility and Process Approval

[GB]

Witten - Forging Facility and Process Approval

[GB]

Siegen - Foundry Facility and Process Approval

[GB]
Siegen - Rolled Bars - Machinery, Facility and Process Approval[GB]

BV - Bureau Veritas

Witten - Steelmaking, rolling and forgings[GB]
Krefeld- forgings[GB]
Siegen - Steelmaking and rolling[GB]

Class NK - Nippon Kaiji Kyokai

Witten - Casting & Forging[GB]

DNV_GL - Det Norske Veritas_Germanischer Lloyd

Witten - Steel forgings (inkl. HY-80, HY-100)[GB]
Witten - Steelmaking & rolled steel products (inkl. HY-80, HY-100)[GB]
Krefeld - Steel forgings[GB]
Siegen - Steelmaking[GB]
Siegen - Rolled steel products[GB]

Hagen - Rolled steel products

[GB]

Witten - OS-E302 Offshore Mooring Chain

[GB]

Krefeld - OS-E302 Offshore Mooring Chain

[GB]

LR - Lloyd's Register

Siegen - Steelmaking and bars[GB]
Witten - Steelmaking, Semi-Finished Products and Bars[GB]
Witten - Forgings[GB]
Krefeld - Forgings[GB]

KRS - Korean Register of Shipping

Witten - steelmaking, rolling, forgings

[GB]

Krefeld - forgings

[GB]

Siegen - steelmaking, rolling

[GB]

RINA - Registro Italiano Navale

Witten, Krefeld - Steelmaking, rolling and forging                                                                     

[GB]