Pipe plant

Pipe Plant


AP-Tela Oy pipe plant manufactures thick-walled pipes, cylinders and cones by bending a plate and welding the longitudinal seam. Diameter, wall thickness and length can be custom-made. This enables cost-effective optimizing of the pieces.

The materials used:

  • Constructional steel, as S235 and S355
  • Hardened boron steel, as  B13S
  • Raex, Hardox, Dillidur
  • Shipbuilding and OFFSHORE steel grades
  • Steel grades for pressure vessels
  • Heat resisting steel grades, as 16Mo3
  • Stainless and acid-proof steel grades, as AISI 304 , 316
  • Duplex steel grades, as EN 1.4162 ( LDX 2101)

The welded steel pipes are manufactured at AP-Tela Oy pipe plant to customer-specified dimensions, identified by means of documentation and according to the EN standards with certified quality.

Each welded steel pipe is dimensionally precise and of uniform quality; an annealing furnace is used to relieve welding stresses.

Manufacturing dimensions

  • Diameter: freely selectable within the range 320–8,000 mm
  • Material thickness: up to 70 mm
  • Maximum length without round seams: 12 m

Dimensional and shape tolerances

  • Straightness: 0.5 mm/m (max. 3 mm)
  • D: +/-2 mm; L: +/-5 mm

Welding standards and quality management