KOLLER structural steelwork

Our business unit Structural Steelwork designs, manufactures and distributes highly specialized steelwork structures mainly for the offshore and subsea application.

Product classes

• Offshore Steelwork
• Subsea Stellwork

Our Steelwork Value Chain


KOLLER steelwork design process

From idea to design drawing. We design exactly according to your requirements or we utilize your existing design drawings.


KOLLER steelwork preparation

Grinding, chamfering, tacking – each connection is prepared for the high quality weld seams that is guaranteed.


KOLLER steelwork welding

Our capabilities and authorisations cover MIG, MAG and WIG processes with material thickness up to 160 mm. Our welders handle many different metal types, from regular to austenite steel as well as aluminum.

Inspection and Testing

KOLLER load test

We perform all required tests like VT, MT, UT, RT or stress tests like load test.

All inspections and tests are observed by our quality management or by external classification societies.

KOLLER load test


KOLLER steelwork coating

We coat according to the latest available standards which is required by the global oil and gas industry. Surface preparation like sandblasting guaranties a perfect result.