Service with the highest quality standards

QUALITY is our top priority.

We always offer our customers the best possible quality and the highest standards.

On the following page we would like to inform you about our quality assurance procedures and the heat treatment methods we use.

Quality assurance

Our quality assurance system/quality management system documents and monitors every order from receipt of the pipe to delivery of the elbow.

Our control mechanisms guarantee you consistently high quality for every sheet in a production series.

Both internal and external audits contribute to this high quality.

We are certified and approved according to:

  • ISO 9001:2015
  • DNV GL
  • PED 2014/68/EU (PED 97/23/EG)

You can download the certificates in the download area.

In close cooperation with Lloyds Register, Bureau Veritas, Det Norske Veritas and the American Bureau of Shipping, we can also carry out the corresponding inspections.

Heat treatment

Our annealing centre allows us to break new ground in the heat treatment of our pipe bends. We have three heat treatment ovens that are controlled by a central computer and allow us to use the following processes:

• Normalizing

• Stress-relief annealing

• Solution annealing

All heat treatments are recorded and attached for analysis and later documentation.

Normal annealing

Normalising, also called normalising, is used to eliminate structural irregularities. The material is brought to a temperature above the transformation point. The pipe bends are then cooled down in a controlled manner. This process produces a more uniform and finer structure. Some materials require subsequent “tempering” in a temperature range of 700-780°C.

Stress-relief annealing

Stress-relieving annealing is used to reduce stresses that occur during deformation from the pipe to the elbow. Here, too, the pipe bends are heated to a certain temperature, depending on the material, but this temperature is not quite as high as in normalising. Subsequently, it is also cooled in the air

Solution annealing

Solution annealing involves heating austenitic steel pipe bends to a temperature of between 1020°C and 1080°C. They are then quickly cooled down in a water bath.


  • Drawing creation
  • Wanddickenberechnung
  • Production also of small series
  • mechanical processing
  • Surface treatment / corrosion protection
  • additional markers
  • additional material tests
  • Parcel shipping
  • Express delivery
  • Neutral shipments to end customers
  • Special packaging (export)


Various information can be downloaded in this area.


Company information