Circ Seam Milling Machines

An optimum weld seam preparation is the basis for a high-quality weld seam. Therefore, we have developed the Graebener® circ 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 120 mm.

Circ Seam Milling Machines

An optimum weld seam preparation is the basis for a high-quality weld seam. Therefore, we have developed the Graebener® circ 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 120 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® circ seam milling machines ensure the cost-efficient, reliable and safe preparation of circ seams at pipes, vessels and apparatuses. For this reason, they have been among the most popular seam milling machines for the preparation of seams for the narrow gap welding for several years. Actual usability studies give proof of cost benefits of more than 30 percent.

Your Graebener® machine will save you time and money since the circ seam milling machine is also suitable for a quick and reliable seam repair. Benefit from our individual concepts and numerous advantages in comparison to conventional gouging or grinding methods.

Our solutions are suited for a wide range of pipe dimensions.

External pipe diameter:  

from 800 mm

Wall thickness:

from 10 mm

Milling depth:

up to 120 mm

Graebener® circ seam milling machines are supplied in two different designs ideally suited for your requirements: as transportable design which can easily be moved to the workpiece by crane or forklift truck or as rail bound solution.
Based on various capacity classes we will find the optimum solution for a cost-efficient weld seam preparation. As special machine builder we also develop customize special machine designs on request.

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Gräbener® Circ Seam Milling Machine, GRF 30
Gräbener<sup>®</sup> Circ Seam Milling Machine, GRF 30
  • Power: 30 kW
  • Milling depth: up to 60 mm
  • External pipe diameter: from 31" (800 mm)
  • Possible transport: crane, forklift truck
Gräbener® Circ Seam Milling Machine, GRF 45
Gräbener<sup>®</sup> Circ Seam Milling Machine, GRF 45
  • Power: 45 kW
  • Milling depth: up to 100 mm
  • External pipe diameter: from 31" (800 mm)
  • Possible transport: crane, forklift truck
Gräbener® Circ Seam Milling Machine, GRF 55
Gräbener<sup>®</sup> Circ Seam Milling Machine, GRF 55
  • Power: 55 kW
  • Milling depth: up to 120 mm
  • External pipe diameter: from 31" (800 mm)
  • Possible transport: crane, forklift truck
Gräbener® Circ Seam Milling Machine, GRF 45-V
Gräbener<sup>®</sup> Circ Seam Milling Machine, GRF 45-V
  • Power: 45 kW
  • Milling depth: up to 100 mm
  • External pipe diameter: from 31" (800 mm)
  • Possible transport: rails
Gräbener® Circ Seam Milling Machine, GRF 55-H
Gräbener<sup>®</sup> Circ Seam Milling Machine, GRF 55-H
  • Power: 55 kW
  • Milling depth: up to 120 mm
  • External pipe diameter: from 31" (800 mm)
  • Possible transport: rails
Gräbener® Circ Seam Milling Machine, GRF-S
Gräbener<sup>®</sup> Circ Seam Milling Machine, GRF-S
  • Special Design on Request of the Customer

All Graebener® circ seam milling machines are equipped with an intelligent sensor system for the compensation of a possible unevenness or ovality. This way, your Graebener® machine ensures a constant depth of the seam preparation at any time.

Benefit from the technical advantages of your Graebener® circ seam milling machine.

  • Milling speed of up to 600 mm per minute
  • Precise seam tracking at the control screen thanks to integrated camera and laser
  • Compensation of the lateral workpiece drift by ±35 mm
  • 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. 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 – eliminating the need for re-machining.

Working Conditions

 Gouging / Grinding

Graebener® Seam Milling

Physical strain

Manual labor

Controlled operation with ovality and drift compensation

Noise

Harmful to health

Below 80dB (A)

Heat

Severe, with contamination of the surface

No strain

Dust

Hazardous to health, grinding dust

No emission

Disposal

Much hazardous waste

Recyclable chips

Seam Quality

 Gouging / Grinding

Graebener® Seam Milling

Geometry

Varying gap width and depth

Machine tool precision of gap width and depth

Surface

Impure surface 
(dye penetrant test) 

Smooth surface
(no testing and re-machining required)

Root pass

Risk of included blowholes and existing root defects

No hidden blowholes, constant root removal

Automation

Automated welding only possible with great efforts

Automated welding possible with low efforts

Optimum weld seam preparation at apparatuses

Steinhaus, Austria

Milling speed up to 600 mm (23.6 in) per minute including automatic positioning for pipe ovality

Machine the difference.

Use standard milling tips with several cutting edges and long lifetimes

Machine the difference.

Simple and accurate seam tracking by camera and laser technology.

Machine the difference.

Optimum weld seam preparation at apparatuses

Steinhaus, Austria

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