Evonik Degussa Gmbh

Salzgitter Mannesmann Line Pipe Gmbh

Mannesmannroehren-werke Ag

Joern Winkels

Hans-Juergen Kocks

Rainer Goering

Andreas Dowe

Martin Risthaus

Reinhard Beuth

Markus Hartmann

Klaus Gahlmann

Gerd-Joachim Deppe

Claudia Behrens

Holger Brauer

Konrad Thannbichler

Reinhard Buessing

Bernd Engler

Norbert Schoenartz

A metal conduit pipe, which is covered with an extruded layer made of polyamide molding compound, is used to produce a duct laid in water, wherein in the course of laying the duct, the coating is exposed to a shearing pressure load and/or a bending load due to laying method selected.

Use of a conduit pipe for producing a duct laid in water

The foundation structure of an offshore structure, for example of an offshore wind energy system, is composed of steel tubes sheathed by an extruded layer made of a polyamide moulding composition. This simultaneously ensures both good protection from corrosion and good protection from mechanical effects, giving the foundation structure markedly prolonged lifetime.

Polyamide-sheathed structural steel tubes for offshore structures

A pipeline laid trenchlessly and/or without a sand bed is produced using a metallic conduit which is encased with an extruded layer of a polyamide molding material. In this way, the durability of the outer shell required for trenchless laying techniques without a sand bed is ensured.

Method of producing an underground pipeline

Growing community of inventors

Werl, Germany

Joern Winkels