New power for old technology: Benefit from the economic advantages of a retrofit. We update your existing machines or production lines according to the latest technological standards. Based on decades of experiences, a holistic machine approach and your individual market requirements we offer extensive and competent advice and realize your personal retrofit solution from one source: fast, reliable and economic.

Save costs, shorten production standstills, increase productivity – two reference examples:
• Retrofit of a pipe bending press in one go within 3 weeks. -> Result: productivity increase by 30%.
• Retrofit of a pipe bending press in several steps. -> Result: reduction of the production time for a pipe by more than 90%.

Retrofitted machines are measurably more cost-efficient, productive, safe and, not least, more reliable.
Our references worldwide can attest to that. We provide you with the decisive competitive edge.

As one of the few hydroforming pioneers we have been developing our hydroforming lines since the mid 1980ies. Based on this long-term experience we realize your customized solution from a wide range of various press designs. Each machine is matched and tailored for the respective type of application.

Calibrating and straightening in one machine. Our efficient and economic multi-purpose machines offer the highest possible flexibility for the production of LSAW pipes. Welded pipes are calibrated and straightened to the set dimension in your Graebener® calibration and straightening press. The press tool is of a modular and cost-efficient design.

4-in-1 – unmatched worldwide: Our newest machine development, the combined Graebener® calibration, straightening and pre-bending press allows you to benefit from a patented 4-in-1 technology. Pre-bending of plates, calibration and straightening of pipes and bending of already formed pipes in one single machine.

Our 4-roll bending machines differentiate from the standard when it comes to the production of large vessels, wind towers and monopiles with increased wall thickness. We have specialized on types of applications which require a continuously high production output and quality from the machines – even at a wall thickness of up to 200 mm. Corresponding to this, the Graebener® roll bending machines have a robust and long-lasting design.

Our 3-roll bending machines are based on more than 40 years of experience in bending technology. Benefit from our individual concepts – especially for shells of increased length and wall thickness. Irrespective of whether to be formed conically or cylindrically.

• Suited for increased wall thicknesses
• Economic production of cones without damage to the longitudinal plate edge
• Increased stiffness of the tilting bearing column
• Top roll inclination so that the pipe shells can be removed
• inklusive special plate handling system

Highly flexible, reliable and economic: Graebener® pipe bending presses provide you with the decisive competitive edge in the production of LSAW pipe between 16 and 64" (406 - 1,625 mm). Benefit from our experience and the special characteristics of the Graebener® technology – especially when it comes to increased wall thickness up to 75 mm and special requirements. Be different than the standard.

In the production of LSAW pipes and pipe sections, pre-bending presses carry out the first bending step of the steel plates. The plate edges are pre-bent prior to the downstream bending process so that the straight plate ends of the bent pipes are reduced to a minimum.

Our pre-bending machines are no standard solutions. Over decades we have been specializing as manufacturer of customized machines following the ever-increasing quality requirements of pipe respectively wind tower production. Our machines are customized to your requirements and designed for the applied materials and quality classes.

• Suitable for a wall thickness of up to 150 mm
• Pre-bending of conical shell sections is possible
• Automated positioning device for the plate handling during the pre-bending process

Our Graebener® circ seam milling machines ensure the cost-efficient, reliable and safe weld seam preparation and are also suitable for the quick and reliable seam repair.

Customized mobility: The circ seam milling machines are available in three different versions: as a transportable solution that can be easily positioned by crane or forklift to the workpiece, with an additional base for transportation by SPMT (self-propelled modular transporter) or as a rail-mounted solution.

Highlight for wind towers and monopiles: In addition, the transportable milling machines can be positioned at different heights to the pipe sections using our special height adapter, allowing you to process very different diameters with one machine.

We realize your individual single machines for forming, cutting, welding and straightening including all tools.
For larger and more complex projects we develop tailor-made and scalable lines for series production – from the coil to the single or welded bipolar plate.
In addition, we support you with our stack press in the technical testing of your stacks.

Our machines operate with high precision, fast and reliable even under the most difficult conditions and after years of operation. We offer plate edge milling machines individually tailored to your requirements in a wide range of possible designs, e.g. with slewable milling head, moveable clamping beams or as tandem system. Our solutions are ideally suited for a wide range of plate dimensions: plate length up to 30 m, wall thickness up to 150 mm, individual plate weight up to 100 t.

Graebener® profile milling machines guarantee an optimum weld seam preparation at shipbuilding profiles. Our machines are suited for all common types of (shipbuilding) steels and can be used for various profile shapes in a flexible and cost-efficient way – for example bulb profiles, T-profiles, angle steels and flats.

Our machines (underground a. overground designs) are equipped with an intelligent copying system which compensates the height difference in case of uneven pipe supports. This way, we ensure a constant seam depth at any time. Quick and economic operation with milling speeds of up to 1,000mm per minute and cost-efficient milling tips with multiple cutting edges. The operator-friendly and accurate seam tracking is carried out by means of an integrated camera and laser pointer at the control screen.

Our end beveling machine are a one-for-all technology which helps you process the most complex weld seam geometries and facing operations in a cost-efficient way, even with wall thicknesses of up to 80 mm. Mechanical copying and CNC copying in one machine – including an automatic ovality compensation. Optimally suited for carbon steels as well as other material grades.

With our continuous root tacking machines you can accurately close the gap remaining in the LSAW pipes after the pipe forming process. The longitudinal edges are pushed together thus closing the open seam pipe. This way, the tacking lay can be optimally introduced to the open seam pipe in a subsequent process.

Precise Processing due to roller cage: The pipe is passed through the machine in a continuous process being guided by pressure rolls in all four directions. The top rolls are located in a patented roller cage and can be adjusted like the lateral rolls for a precise processing of the open seam pipe. During the entire process, the welding gap is scanned by means of a 2D laser scanner ensuring an ideal positioning of the welding head to the welding gap, a constant tacking lay and thus the optimum basis for the subsequent submerged arc welding processes.

With our Tailor-Welded-Plates® technology we bring the automated panel production to a new quality level. Our customized solutions combine highly precise Graebener® plate edge milling machines with most modern laser hybrid welding technology. Benefit from our milling and welding technology.