Dairesel Kök Kaldırma ve Kaynak Ağzı Açma Makinesi

Circular Root Opening and Beveling Machine

Preparing the welding seam properly means ensuring the welding is done with high quality. That is why Graebener® developed the circular root opening and beveling machine. Drawing on our experience as a global market leader, you can prepare the welding seam at milling depths of up to 120 mm in a more profitable, faster, and healthier way than ever before.

Overview

Up until the 1990s, we operated our own Graebener® pipe plant where we prepared our pipe welding seams through laborious and manual processes. We then developed the Graebener® circular root opening and beveling machine, which is now used by more than 100 customers across four continents who benefit from our leading machine technology in the market.

The Graebener® circular root opening and beveling machine allows for the cost-effective, reliable, and safe preparation of circular seams in pipes, ships, and devices. As a result, our root opening and beveling machines have been among the most popular machines for milling incredibly tight welding seams for years. According to conducted usability studies, our machines provide more than a 50% cost advantage.

Your Graebener® machine will save you time and money as the circular root opening and beveling machine is also highly suitable for fast and reliable operation. Benefit from our individual concepts and the numerous advantages we offer compared to traditional gouging or grinding methods.

Machine Concepts

Graebener® circular root opening and beveling machines are available in two different designs tailored to your needs: a portable system easily transported to the job site by crane or forklift or a rail system. We offer the most cost-effective solution for root opening operations according to different capacity classes. As a specialized machine manufacturer, we also develop customized machine designs on demand.
Graebener® Circular Root Opening and Beveling Machine, Type GRF 30

• Power: 30 kW

• Milling depth: up to 60 mm

• Outer pipe diameter: from 31" (800 mm) onwards

• Transport options: crane, forklift

Graebener® Circular Root Opening and Beveling Machine, Type GRF 45

• Power: 45 kW

• Milling depth: up to 100 mm

• Outer pipe diameter: from 31" (800 mm) onwards

• Transport options: crane, forklift

Graebener® Circular Root Opening and Beveling Machine, Type GRF 55

• Power: 55 kW

• Milling depth: up to 150 mm

• Outer pipe diameter: from 31" (800 mm) onwards

• Transport options: crane, forklift

Graebener® Circular Root Opening and Beveling Machine, Type GRF 45-V

• Power: 45 kW

• Milling depth: up to 100 mm

• Outer pipe diameter: from 31" (800 mm) onwards

• Transport options: rail system

Graebener® Circular Root Opening and Beveling Machine, Type GRF 55-H

• Power: 55 kW

• Milling depth: up to 150 mm

• Outer pipe diameter: from 31" (800 mm) onwards

• Transport options: rail system

Graebener® Circular Root Opening and Beveling Machine, Type GRF-S

• Custom Design on Customer Demand

All Graebener® circular root opening and beveling machines are equipped with intelligent sensor systems to correct any fault or incline. This means your Graebener® machine always maintains a constant welding seam depth.

Take advantage of the technical benefits of your Graebener® circular root opening and beveling machine:

• Up to 600 mm per minute milling speed

• Perfect seam tracking on the control screen thanks to integrated camera and laser features

• Compensates for lateral material slippage up to ±35 mm

• Low-cost milling heads with multiple cutting edges

Milling and Gouging

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

• Enhanced groove quality

• Improved working conditions

• Recyclable chips

• Reduction in processing time

• Precursor for automatic welding processes

• Reduction in welding seam defects

• Visual control of internal root

• Reduction in welding slag and thus heat input

• Energy savings

Real-work studies with our customers have proven that as a machine operator, you can save time and money and also maintain the health of your machine operators and significantly increase the quality of seam preparation, eliminating the need for manual rework.