AP-Tela Oy

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

• EN ISO 5817, Category B or C

• Welding quality management: EN ISO 3834-2

• Quality management system: EN ISO 9001:2000