Pre-Bending and Crimping Presses

Whether for pipelines, large vessels or wind towers: Graebener® offers customized solutions for optimum pre-bending respectively crimping results for almost any types of applications. Graebener® pre-bending and crimping presses reduce the straight plate ends of bent pipes already prior to the bending process. They are ideally suitable for large wall thicknesses of up to 150 mm and are also used reliably for the production of cylindric pipes as well as conical shell sections.

Pre-Bending and Crimping Presses

Whether for pipelines, large vessels or wind towers: Graebener® offers customized solutions for optimum pre-bending respectively crimping results for almost any types of applications. Graebener® pre-bending and crimping presses reduce the straight plate ends of bent pipes already prior to the bending process. They are ideally suitable for large wall thicknesses of up to 150 mm and are also used reliably for the production of cylindric pipes as well as conical shell sections.

OverviewConcepts

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

Based on our many years of experience as former manufacturer of LSAW pipes we offer customized pre-bending and crimping solutions as special machine builder. Depending on the type of application and your individual requirements we use the two different methods of pre-bending and crimping: in case of plates with a wall thickness of 150 mm both plate edges are pre-bent subsequently over the entire plate width. In case of plates with a smaller wall thickness of up to 75 mm a step-by-step process is used where both plate sides are crimped simultaneously in several steps throughout a length of up to 18 meters.

Graebener® pre-bending and crimping 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. Our mission is that your Graebener® machine makes you better. Irrespective of whether you invest in a new Graebener® machine or whether you choose a Graebener® retrofit solution.

On the basis of the following machine concepts we find the optimum solution for you:
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Graebener® Pre-Bending Press, Type GAB
Graebener<sup>®</sup> Pre-Bending Press, Type GAB
  • Suitable for a wall thickness of up to 150 mm
  • Prebending of conical shell sections is possible
  • Deflection compensation over the entire prebending length
  • Automated positioning device for the plate handling during the pre-bending process
Graebener® Crimping Press, Type GCP
Graebener<sup>®</sup> Crimping Press, Type GCP
  • Simultaneous crimping of both plate sides
  • Suitable for plates with a length of up to 18 m
  • Plate edges are not crushed
Graebener® Calibration and Straightening Press with Crimping Option, Type GKP
Graebener<sup>®</sup> Calibration and Straightening Press with Crimping Option, Type GKP
  • Patented 4in1 Graebener® technology for highly flexible production
  • Combines the advantages of calibration and straightening press with those of the crimping press
  • Reduces down times of individual machines

You buy a Graebener® solution

You get more than just a machine or system. You get a reliable partner who understands your processes and who develops the optimum solution for the market challenges together with you.

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