▷ HDPE pipes and accessories LARGE DIAMETER (from 0.8m to 4m)

How do we manufacture our HDPE pipes?

We manufacture our PPA&KRAH pipes and fittings using helical extrusion technology, in accordance with the guidelines of DIN 16961 “Thermoplastic pipes and fittings with profiled outer and smooth inner surfaces”.

The combination of the translational movement of the extruder head, with the rotational movement of the mold, generates a helix of material that covers the surface of the mold (the steel mold on which the pipe is manufactured defines the internal diameter of the PPA&KRAH pipes)

The helical extrusion system on a mold allows the extrusion of solid walls of any thickness, with the possibility of reinforcing them by means of internal or external lightened sections.

“All pipes and accessories incorporate socket-spigot ends, with the possibility of mounting other ends on demand (flanged, flat and combinations)”

The socket is formed in the manufacturing process on the mold. The tapered spigot end is machined in a post-extrusion step after the pipe has cooled.

“The pipes are manufactured in one piece”

The integrated co-extrusion system, together with the main extruder, allows the extrusion of homogeneous walls of black PE100 and yellow PE100, giving the possibility of improving visibility inside the pipes. Co-extrusion also allows the homogeneous extrusion of PE walls with internal linings of electro-conductive material.