After many years building necking-in machines, it’s not a coincidence that DENN has built many of these machines including the largest in the world, up to 720 mm diameter and 40 mm thickness ST-37. Many years of experience in the field allowed DENN to be one of the leaders worldwide in this field. Robustness and repeatability are 2 key factors in these reliable machines

DENN being leader in hot forming processes the displays the complete CTA series whose application covers the manufacture of a wide range of products related to CNG bottles and liners as well as pressure cylinders mainly aimed to contain and transport compressed natural gas. In this regard, our machines can work metal pipes with diameters up to 720 mm.

Tubes in this Industry, with a variety of materials in superalloys such as Inconels and Duplex F55 and similar are used for overheat steam and exhaust generator steam applications, included in power plants. The standard manufacturing process is to machine the parts starting with pieces up to 90 mm thick and reduce them by machining process down to 20-35 mm. Now, with our very heavy duty flow forming machines, there is no need to machine the parts and therefore getting huge saving-cost in the manufacturing process.

Also used in chemical processes in hot temperature conditions, in thermic plants. When it comes to turbines, diameters of tubes go up to 800 mm and 35 mm thick, with materials as ASTM F91, A182 series , F92 or F22.

Largest form forming machine in the world, up to 1800 mm diameter, has been built also by us. A very close relationship with our customers and excellent job by our engineers, make possible to DENN be one of the main suppliers of state-in-the-art flow forming machines in the world.

2, 3 , 4 and even 6 roller flow forming lathes are available at DENN. Just let us know your needs and requirements, and we will be glad to work with you. Machines up to 65 mm in wall thickness are available.

High productivity, realiable and versatile machines to obtain fire extinguishers. DENN has built these machines for such application with the option to load and load the pieces by using a robot and installation of induction units in order to optimize the process and increase the productivity

A process of metal forming by rotation (or spinning) is used for the manufacture of pressure vessels and containers. The special configuration of this sort of machine allows both the starting tube fixation and the “heating” work by means of an external induction unit so that the corresponding fusion of the steel occurs to ensure the container sealing. The pressure vessels are used for oxygen bottles (immersion bottles), CNG (compressed natural gas), hydraulic accumulators, etc.

The weight reduction and improvement of the mechanical properties are main benefits of the flowforming process .

DENN provides high accuracy CNC Cad-Cam machines specially designed to the After-Market and OEM industries adapted to each customer’s production volume.

• Specific horizontal and vertical flowforming machines for cast and forged wheels.
• Rotary Forge + Flowforming