Wind Tower Sections & Joints

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A tower is a stack of cans

Each section is a string of rolled cans, welded end to end. The flanges at each end decide whether the tower stands straight.

Scroll to see how it is built · drag to turn it round

02 / 07

Rolled cans

Plate is cut and bevelled, then rolled to diameter on the plate rolls and seam welded. The cans are fitted up on rollers so their seams stagger, as the design asks.

How is it possible at Allmarc?

Three-roll pinch cum pyramid plate rollsRolls plate up to 40 mm

Used here for: Rolled cans

• Rolls plate up to 40 mm

All our machinery

Submerged-arc (SAW) welding lineFull-penetration welds on built-up sections

Used here for: Rolled cans

• Full-penetration welds on built-up sections

All our machinery

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Seams that are tested

Longitudinal and circumferential seams run on the submerged-arc line, then are inspected to the client plan.

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Flanges that stay flat

The L-flange is welded to the end can in a sequence that keeps its face flat, so the joint closes without gaps when the bolts are tensioned.

How is it possible at Allmarc?

Manual MIG weldingQualified welders, including 6G

Used here for: Flanges that stay flat

• Qualified welders, including 6G

All our machinery

05 / 07

The bolted joint

Around a hundred bolts on the inner circle join two sections. We supply the joint ready to bolt, with the holes drilled to match the next section.

How is it possible at Allmarc?

Kotec newRun10DX CNC beam drilling lineH-beams up to 1,000 x 500 mm

Used here for: The bolted joint

Heavy profiles that need precise holes, where plasma cannot do the job: the lower structure and panel borders of a ground flare, and every bolted PEB and multi-storey frame.

• H-beams up to 1,000 x 500 mm
• Drills 3 faces in one pass
• Channels, angles and box sections

All our machinery

06 / 07

Door and internals

The heavy door frame is rolled to the shell radius and welded in; platforms and ladders go in before the section leaves.

How is it possible at Allmarc?

Three-roll pinch cum pyramid plate rollsRolls plate up to 40 mm

Used here for: Door and internals

• Rolls plate up to 40 mm

All our machinery

Deratech Supera-H 12030 fibre laser20 kW

Used here for: Door and internals

In 2024 we were the only buyer of Deratech’s 20 kW, 12 m laser.

• 20 kW
• 12 x 3 m bed
• Pallet changer

All our machinery

07 / 07

Every part, apart

Cans, seams, flanges, bolts, door frame and internals.