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Optimal preparation of the weld seam means that the weld is of high quality. That's why we developed the Graebener® longitudinal beveling and root removal machine. Drawing on our global market-leading experience, you can prepare the weld seam with milling depths of up to 165 mm more profitably, faster and healthier than ever before.

Overview

Until the 1990s, we operated our own Graebener® pipe mill and prepared the weld seams of our pipes with boring and manual processes. Then we developed the Graebener® beveling and root removal machine and today more than 100 customers on four continents benefit from our market-leading machine technology.

Graebener® longitudinal beveling and root removal machines enable the cost-effective, reliable and safe preparation of longitudinal seams in pipes, vessels and various devices. For this reason, our beveling and root removal machines have been popular machines for milling even the narrowest weld seams for many years. According to actual usability studies, our machines offer a cost advantage of more than 50 percent.

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

Machine Concepts

Depending on the individual application, Graebener® long-edge milling machines are available in two different design concepts: below ground level and above ground level. With these two machine concepts, we offer you the perfect solution for cost-effective beveling preparation. As a machine manufacturer, we also develop customized special machine designs on request.
Graebener® Longitudinal Beveling and Root Removal Machine, Underfloor Design, Type GLF
Graebener® Longitudinal Beveling and Root Removal Machine, Floor Mounted Design, Type GLF-O

All Graebener® longitudinal beveling and root removal machines are equipped with an intelligent copying system that equalizes the height difference on uneven pipe supports. Thus, your Graebener® machine always ensures constant seam depth.

Benefit from the technical advantages of your Graebener® longitudinal beveling and root removal machine:

• Milling speed up to 1,000 mm per minute
• Seam tracking seamlessly on the control screen thanks to the integrated camera
• Low-cost milling inserts with multiple cutting edges
• The innovative Graebener® rotating device enables crane-independent positioning of the weld seams of cones and cylinders up to 15 meters in diameter

Milling and Grooving

Compared to standard processes such as root removal by carburizing or grinding, Graebener® milling offers many advantages in beveling and root removal:

• Improved gutter quality
• Improved working conditions
• Recyclable chips
• Reduced processing time
• Prerequisite for an automated welding process
• Reduced weld seam defects
• Possibility of visual inspection of the internal weld root
• Reduction of weld scale and thus heat input
• Reducing the need for energy

As proven by real studies with our customers, you as a machine operator can also save time and money. You can also protect the health of your machine operators and greatly improve the quality of seam preparation.