Längs Wurzelentfernung und Schweißnahtöffnungsmaschine

Graebener Longitudinal Weld Seam Opening and Root Removal Machines

Preparing the weld seam properly means achieving high-quality welding. That's why we developed the Graebener® longitudinal weld seam opening and root removal machine. By leveraging our leading market experience on a global scale, you can prepare the weld seam more profitably, faster, and healthier than ever before, with milling depths of up to 165 mm.

Overview

Until the 1990s, we operated our own Graebener® pipe factory and prepared our pipe weld seams with boring and manual processes. We then developed the Graebener® weld seam opening and root removal machine, and today more than 100 customers on four continents benefit from our market-leading machine technology.

Graebener® longitudinal weld seam opening and root removal machines enable cost-effective, reliable, and safe preparation of longitudinal seams in pipes, ships, and various devices. This is why our weld seam opening and root removal machines have been popular for years, even in milling the narrowest weld seams. Robust usability research has shown that our machines provide more than a 50% cost advantage.

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

Machine Concepts

Depending on individual usage, Graebener® long edge milling machines are available in two different design concepts: below-ground and above-ground. These two machine concepts provide the most optimal solution for cost-effective weld seam preparation. As a machine manufacturer, we also develop personalized custom machine designs upon request.
Graebener® Longitudinal Weld Seam Opening and Root Removal Machine, Below-Ground Design, Type GLF
Graebener® Longitudinal Weld Seam Opening and Root Removal Machine, Above-Ground Design, Type GLF-O

All Graebener® longitudinal weld seam opening and root removal machines are equipped with an intelligent copying system that balances the height differences in non-flat pipe supports. This ensures that your Graebener® machine always provides a consistent weld depth.

Benefit from the technical advantages of your Graebener® longitudinal weld seam opening and root removal machine:

• Up to 1,000 mm per minute milling speed

• Seam tracking feature on the control screen with integrated camera for perfect weld seam monitoring

• Low-cost milling tips with multiple cutting edges

• Innovative Graebener® turning device allows positioning of cone and cylinder weld seams up to 15 meters in diameter without the need for a crane

Milling and Groove Opening

When compared to standard processes like carburizing or grinding for root removal, the Graebener® milling method offers numerous advantages for weld seam opening and root removal:

• Improved groove quality

• Enhanced working conditions

• Recyclable chips

• Reduced processing time

• Precondition for an automated welding process

• Reduced weld seam errors

• Visual inspection capability of the internal weld root

• Reduction of welding spatter and thus heat input

• Reduced energy consumption

As evidenced by real studies among our customers, you as a machine operator can save time and money. Moreover, you can protect the health of your machine operators and significantly increase the quality of weld preparation.