Penstock & Intake Supports

01 / 06

Water down a steel pipe

A penstock carries water from the intake to the turbines. It rests on ring girders and frames that let it grow and shrink with the seasons.

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

02 / 06

Ring girders

Rolled from plate on our pyramid rolls and welded round the shell to keep it round under load.

How is it possible at Allmarc?

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

Used here for: Ring girders

• Rolls plate up to 40 mm

All our machinery

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

Used here for: Ring girders

• Full-penetration welds on built-up sections

All our machinery

03 / 06

Frames that let it slide

Legs and cross beams under each girder, on sole plates that slide as the pipe expands.

How is it possible at Allmarc?

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

Used here for: Frames that let it slide

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

04 / 06

Joint and manhole

A sleeve joint above the anchor block, and an inspection manhole with its pad.

05 / 06

Intake trash rack

A frame of flat bars that keeps debris out of the intake, cut and welded to the bar spacing.

How is it possible at Allmarc?

HSG 12 kW fibre laser12 kW

Used here for: Intake trash rack

• 12 kW
• Cuts up to 40 mm
• 2,500 x 8,000 mm bed

All our machinery

06 / 06

Every part, apart

Girders, frames, joint, manhole and rack.