Long Seam Milling Machines

An optimum weld seam preparation is the basis for a high-quality weld seam. Therefore, we have developed the Graebener® long seam milling machine. Benefit from our experience as global market leader and realize your weld seam preparation more profitable, faster and health-friendly than ever before – at milling depths of up to 165 mm.

An optimum weld seam preparation is the basis for a high-quality weld seam. Therefore, we have developed the Graebener® long seam milling machine. Benefit from our experience as global market leader and realize your weld seam preparation more profitable, faster and health-friendly than ever before – at milling depths of up to 165 mm.

OverviewConceptsMilling vs. Gouging

Up to the 1990ies we operated our own Graebener® pipe mill and prepared the weld seams of our pipes in a tedious manual process. Then, we developed the Graebener® seam milling machine – and today, more than 100 customers on four continents already benefit from our market leading machine technology.

Graebener® long seam milling machines ensure the cost-efficient, reliable and safe preparation of longitudinal seams at pipes, vessels and apparatuses. For this reason, they have been among the most popular seam milling machines for the preparation of seams of extremely narrow welding gaps for years. Actual usability studies give proof of cost benefits of more than 50 percent.

Your Graebener® machine will save you time and money. Benefit from our individual concepts and numerous advantages in comparison to conventional gouging or grinding methods.

Depending on the individual type of application, Graebener® long seam milling machines are based on two different design concepts: below floor level and above floor level. With these two machine concepts we find the optimum solution for a cost-efficient weld seam preparation. As special machine builder we also develop customized special machine designs on request.

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Graebener® Long Seam Milling Machine Underground Design, Type GLF
Graebener<sup>®</sup> Long Seam Milling Machine Underground Design, Type GLF

also suited for removing the weld root of two joined straight plates

  • Milling position: 6 o'clock position
  • Capacities: 45 kW and 55 kW
  • Milling depth: up to 165 mm
  • Individual pipe length: 1,500 - 22,000 mm
  • External diameter: 406 - 10,000 mm
  • Pipe weight: 50 t
  • Also suitable for a weld seam preparation of a butt weld in case of joined straight plates
Graebener® Long Seam Milling Machine Overground Design, Type GLF-O
Graebener<sup>®</sup> Long Seam Milling Machine Overground Design, Type GLF-O

For the installation on a floor level machine foundation

  • Milling position: laterally, in 4 o‘clock position
  • Capacities: 55 kW and 65 kW
  • Milling depth: up to 100 mm
  • Individual pipe length: 1,500 - 5,000 mm
  • External diameter: 1,000 to 10,000 mm
  • Pipe weight: 80 t
  • Ground level installation above floor

All Graebener® long seam milling machines are equipped with an intelligent copying system which compensates the height difference in case of uneven pipe supports. This way, your Graebener® machine ensures a constant seam depth at any time.

Benefit from further technological advantages of the Graebener® long seam milling machines.

  • Milling speed of up to 600 mm per minute
  • Precise seam tracking at the control screen thanks to integrated camera and laser pointer
  • Application of cost-efficient milling tips with multiple cutting edges

Compared to the common processes such as carbon rod gouging or grinding, the Graebener® milling process provides numerous advantages:

  • Improved groove quality
  • Improved working conditions
  • Recyclable chips
  • Reduction of processing time
  • Prerequisite for an automated welding process
  • Reduction of weld seam errors
  • Visual check of internal weld root is possible
  • Reduction of weld deposit and thus reduced introduction of heat
  • Reduction of energy demand

As operator you can save time and money as proven by real case studies at our customers. You also preserve the health of your operators and considerably improve the quality of the seam preparation.

You buy a Graebener® solution

You get more than just a machine or system. You get a reliable partner who understands your processes and who develops the optimum solution for the market challenges together with you.

Customer promise