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Renewables

Ocean Thermal Structures

The steel frames that carry the heat exchangers and seawater pipes of an ocean thermal energy plant: columns, floors, ring girders, pipe guides and access.

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Allmarc 3D model · to scale
Explore the model

How it is built.

Scroll: the camera moves to each part in turn and ends on the exploded view. Drag to turn it round yourself.

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A frame round two big exchangers

An ocean thermal plant runs warm and cold seawater through tall heat exchangers. The steel carries them and their big pipes.

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

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The frame

Heavy H columns, beams at every level and braced side frames, cut and drilled on the beam lines.

How is it possible at Allmarc?

Used here for: The frame

  • Plates matched and tack-welded
  • Automatic feed and stitch welding
  • H and I sections built from plate
All our machinery
Kotec newRun10DX CNC beam drilling line in the Allmarc works

Used here for: The frame

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

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Ring girders and guides

Rolled ring girders that carry each exchanger, and guides that hold the seawater pipes.

How is it possible at Allmarc?
Three-roll pinch cum pyramid plate rolls in the Allmarc works

Used here for: Ring girders and guides

  • Rolls plate up to 40 mm
All our machinery

Used here for: Ring girders and guides

Tapered rafters and other non-uniform built-up sections, welded faster and with deeper penetration.

  • 40 m, state of the art
  • No programming: weld lines taken from the 3D model
  • Tandem torch: two wires at once
All our machinery

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Floors and access

Galvanised grating, handrails and a stair to every level.

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Every part, apart

Frame, girders, floors and access.

Why Allmarc

Experience you can trust.

We fabricate to your drawings and prove the fit in our own bay before anything ships. Open any line for the detail.

Talk to an engineer
Repeat parts, identical
  • Laser cutting, CNC punching and robotic welding, so the 1,000th table bolts up like the first.
  • Jigs and fixtures made in house for every repeat part.
Heavy and light, one roof
  • Rolled plate and heavy sections for fixtures, skids and gantries.
  • Light-gauge, punched parts for structures and walkways.
Access we make ourselves
  • Grip-Strut: the only maker in India, planks up to 8 m.
  • R13 anti-slip, 40% lighter than bar grating.
Scale for a pipeline of sites
  • 4 plants at Kanbha; about 6,000 T a month from November 2026.
  • Clients include Adani Renewables, Adani New Industries, Suzlon Energy and Kee Safety.
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