Since 1905, the name Siegthaler has stood for the highest quality at all production stages. In 1938, we started to bend and
weld rings for the following sectors:

  • Tank and apparatus construction
  • Autoclaves
  • Industrial furnaces
  • Mechanical engineering
  • Shipbuilding
  • Pipeline construction
  • Wind turbines

Our machinery enables us to bend and weld rings with an internal diameter of 500mm right up to an external diameter of 7,000mm.
Depending on the raw material and the bending diameter cross sections of up to 65,000 mm² are processed.
We also process seamless rolled rings and flame-cut material with a diameter of up to 8,000mm and a unit weight of up
to 50 tons.

All products can be made from all the common types of material Certifications can be provided from all certification bodies
in Germany and abroad .

Cold and hot bent rings

  • Max. external diameter: 7,000 mm
  • Max. cross section for flash butt welded rings: 65,000 mm²

Seamless rolled rings

  • Diameter: between 300mm and 8,000 mm
  • Weight: max. 50,000 kg