Linepipe Quality Assurance

Certification is in accordance with DIN EN ISO 9001. The entire quality assurance process is regulated, controlled and monitored.

Prematerial from reputed steel works : All hot-rolled wide-strip coils, supplied by top manufacturers, are tested and registered before processing.

High-frequency pressure welding without fillers: Consistent welded seam quality through ongoing optimisation of all welding parameters.

Heat treatment of welded seam: Annealing of the seam area in accordance with specifications.

Multiple ultrasonic weld seam tests: Up to 3 testing points, depending on requirements: after welding flash removal, before cutting the tube to length, and separately following water pressure test.

Cold water pressure tests up to 400 bars: Pressure tests are integrated in the production process, in accordance with standards or specifications.

Special seam structure analysis: Evaluation of micro- and macro sections either randomly or in accordance with customer specifications.

Material testing of finished tube: Determination of mechanical / technical parameters for the relevant application.

High-grade corrosion resistant coating: Polyethylene (PE or fibre-cement) coatings in accordance with standards or customer requirements.