Welding technology

We weld together what belongs together

Our welding technology leads to optimisation with respect to quality and economics.

  • Advising on calculation and project preparation
  • Advising and support during project execution
  • Formulating and maintaining the qualifications of our employees
  • Maintaining the necessary approvals
  • Welding supervision and quality assurance on the jobsites and in our workshop
  • Testing and introduction of new welding methods

We have welding procedure qualifications according to DIN EN ISO 15614-1 for all standard materials.
 Welding procudure qualifications

  • C-steel up to a strength of 485 N/mm², austenitic / austenitic-ferritic materials, high-temperature steel
  • We have qualified welders who are approved to DIN EN 287-1 for standard welding procedures, and according to DIN EN 1418 for mechanised and automatic welding.
  • We weld all dimensions, wall thicknesses and standard welding procedures.


Overview of welding procedures

Orbital welding

TIG-orbital welding (partial weld) of piping with internal tensioning device and cooling system

  • Materials: austenitic and austenitic-ferritic steel, Bubi-pipes (Duplex-Inliner, Close-fit, in C-steel-piping)
  • Visual inspection of root with camera integrated into tensioning device
  • Cooling of weld in case of critical interpass temperatures
  • Up to dimensions of DN 250 x 4.5 mm without welding consumables, DN 250 x 9.0 mm including welding consumables, Bubi-pipes up to dimensions of DN 200 x 14.0 mm (3.0 mm inliner material)


MAG-STT Welding

Welding of piping with MAG-STT (Soft-Tension-Transfer) welding procedure

  • Welding of root pass with solid wire and pulse technology, filler and top bead with flux-cored metal-arc welding
  • Materials up to a strength of 460 N/mm², dimensions from DN 200 to DN 750, wall thicknesses from 10.0 - 35.0 mm
  • High quality welds controlled by steady heat input


Partial mechanical welding of large pipes

Welding pipelines with the combined process of downwards electrode welding for root/hot-pass and MAG (fill wire) for filling and cover passes using partially mechanical pipeline welding equipment.

  • Materials: Ferritic metals including thermo-mechanically treated fine-grain structural steel
  • Pipe dimensions: 16" (406.4 mm) to 64" (1625.6 mm)
  • May be done in workshop or construction site production


Stainless steel welding / Landau

Double-walled lining of an oil tank with leakage detection system

  • Capacity: 200 msup3
  • Material: 1.4571
  • Client: Wintershall AG, Barnstorf


Titanium welding /Stade

Fabrication and assembly of a titanium pipeline DN 400, corrosion resistant, high strength with low density (42 % tighter than steel). Client: DOW Deutschland Anlagengesellschaft mbH, Stade