Circular Root Lifting and Welding Groove Opening Machine

Circular Root Lifting and Welding Groove Opening Machine

Preparing the weld seam in the best way means that the welding is done with high quality. For this reason, we developed the Graebener® circular welding groove opening and root lifting machine. By leveraging our market-leading experience on a global scale, you can prepare the weld seam at milling depths of up to 120 mm more profitably, faster, and healthier than ever before.

Overview

Until the 1990s, we operated our own Graebener® pipe factory and prepared the weld seams of our pipes through tedious and manual processes. Later, we developed the Graebener® welding groove opening and root lifting machine, and today more than 100 customers across four continents benefit from our market-leading machine technology.

The Graebener® circular welding groove opening and root lifting machine enables the cost-effective, reliable, and safe preparation of circular seams in pipes, ships, and devices. Therefore, our groove opening and root lifting machines have been among the most popular machines for milling extremely narrow weld seams for years. According to real usability studies conducted, our machines provide more than 50% cost advantage.

Your Graebener® machine will save you time and money, as the circular welding groove opening and root lifting machine is also highly suitable for processing quickly and reliably. Take advantage of our individual concepts and the countless benefits we offer compared to traditional groove opening or grinding methods.

Machine Concepts

Graebener® circular welding groove opening and root lifting machines can be supplied with two different designs that best suit your requirements, namely a portable system that can be easily transported with a crane or forklift, or a rail system. Depending on different capacity classes, we offer the most suitable solution for cost-effective groove opening operations. As a special machine manufacturer, we also develop customized machine designs upon request.
Graebener® Circular Welding Groove Opening and Root Lifting Machine, Type GRF 30

• Power: 30 kW

• Milling depth: up to 60 mm

• Outer pipe diameter: from 31″ (800 mm)

• Transport options: crane, forklift

Graebener® Circular Welding Groove Opening and Root Lifting Machine, Type GRF 45

• Power: 45 kW

• Milling depth: up to 100 mm

• Outer pipe diameter: from 31″ (800 mm)

• Transport options: crane, forklift

Graebener® Circular Welding Groove Opening and Root Lifting Machine, Type GRF 55

• Power: 55 kW

• Milling depth: up to 150 mm

• Outer pipe diameter: from 31″ (800 mm)

• Transport options: crane, forklift

Graebener® Circular Welding Groove Opening and Root Lifting Machine, Type GRF 45-V

• Power: 45 kW

• Milling depth: up to 100 mm

• Outer pipe diameter: from 31″ (800 mm)

• Transport options: rail system

Graebener® Circular Welding Groove Opening and Root Lifting Machine, Type GRF 55-H

• Power: 55 kW

• Milling depth: up to 150 mm

• Outer pipe diameter: from 31″ (800 mm)

• Transport options: rail system

Graebener® Circular Welding Groove Opening and Root Lifting Machine, Type GRF-S

• Custom Design Upon Customer Request

All Graebener® circular welding groove opening and root lifting machines are equipped with a smart sensor system to eliminate any potential irregularities or inclinations. Thus, your Graebener® machine always ensures a consistent seam depth.

Take advantage of the technical benefits of your Graebener® circular welding groove opening and root lifting machine:

• Milling speed of up to 600 mm per minute

• Seam tracking feature perfectly displayed on the control screen thanks to the integrated camera and laser

• Compensates for lateral workpiece shift of ±35 mm

• Low-cost milling tools with multiple cutting edges

Milling and Groove Opening

Compared to standard processes like groove opening or grinding with carbon electrodes, the Graebener® milling method offers you numerous advantages:

• Improved groove quality

• Enhanced working conditions

• Recyclable chips

• Reduction in processing time

• Prerequisite for automatic welding process

• Reduction in welding seam defects

• Visual control of the root of the internal weld

• Reduction in welding slag and thus heat input

• Reduction in energy requirements

As proven by real studies conducted with our customers, you as a machine operator can save time and money. Additionally, you can protect the health of your machine operators and significantly increase the quality of seam preparation – eliminating the need for manual reworking.