Pipe Mills & Hydropower

Rolling for Critical Infrastructure

Q: How does Davi MAV PPM technology manage plate deflection when rolling extremely long spans for critical pipeline infrastructure?

To maintain perfect geometry over long spans, our MAV PPM technology utilizes independent hydraulic back-up rollers paired with anti-deflection beams that actively manage roll-bend under high forming forces. This advanced structural reinforcement prevents the "barrel effect," ensuring consistent cylindrical accuracy and strict compliance with dimensional tolerances across the entire length of the pipe.

Q: Can a single Davi machine handle both narrow, heavy-wall high-pressure penstocks and standard pipeline diameters?

Yes, the MAV variable geometry system allows the side rolls to move horizontally and the top roll to adjust vertically, functioning similarly to a highly flexible press-brake. This variable axis configuration allows fabricators to adjust the interaxis distance dynamically, giving you the versatile capacity to form heavy-duty penstocks or shift to tight-diameter pipes up to 50 mm (2 in) thick using a single rolling system.

Q: What specific diameter configurations are available for high-capacity LSAW pipe mill production?

For standard heavy-wall production, our pre-stressed rolls can form high-pressure pipes starting from 508 mm (20 in) in diameter and above. For tighter dimensional demands, the system can be configured with a reduced 203 mm (8 in) top roll combined with a heavy-duty supporting beam, enabling the precise rolling of pipes down to 406 mm (16 in) in diameter.

Q: How do the iRoll control systems improve the assembly efficiency of massive hydropower penstock segments on-site?

Our iRoll eXtreme and Performance control systems utilize precise positioning software to guarantee the roundness of rolled segments, eliminating geometrical inconsistencies. By ensuring high structural precision during the rolling phase, the penstock segments align perfectly on-site, significantly reducing time-consuming manual corrections and circumferential welding cycles during assembly.

Davi provides engineering solutions for two of the most demanding sectors in the energy industry. From specialized machinery designed for high-pressure LSAW (Longitudinally Submerged Arc Welded) pipe production to plate rolls for massive hydropower penstocks, our technology ensures productivity and precision.

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Rolling Heavy-Duty Penstocks

Hydropower

In the hydropower sector, constructing penstocks and other components requires machines capable of handling massive diameters and high-resistance materials.

Plate Rolling

We provide both 3-roll and 4-roll solutions capable of rolling very large plate widths to minimize circumferential welds, increasing the structural safety of the penstock.

Geometric Consistency

Utilizing the iRoll eXtreme or Performance control system, fabricators can guarantee the perfect roundness of segments, simplifying on-site assembly and welding.

Industry References

We collaborate with global leaders such as Andritz Hydro, providing the rolling power needed for the world's largest hydroelectric plants.

MAV PPM Technology

Pipe Mill Solutions

For the production of pipes, Davi has developed the MAV PPM, a 3-roll variable axis plate roll with a unique, dedicated geometry. This machine is engineered to exceed the limits of standard rollers, allowing for the tightest diameters in the industry across large widths.

Pre-Stressed Outboard Design

The MAV PPM utilizes a press-roll design where the top roll acts as a "Ram" and the two side rolls form a "V" geometry, simulating a press-brake action for extreme accuracy.

What’s Inside

Analysis

Precision rolling for your sector-specific requirements.

STRATEGY

Managing all the peculiar parts typical of your industry.

DATA

Material and thickness considerations for rolling applications.

Empower Your Energy Projects

Davi is the partner of choice for both family businesses and global corporations. From supporting Allan Edwards in the USA to executing complex projects with Andritz Hydro, we turn engineering challenges into production realities.