Borealis Gmbh

Borealis Technology Oy

Tony Lindstroem

Cecilia Rydin

Carl-Gustaf Ek

Achim Hesse

Siegfried Liedauer

James McGoldrick

Allan Boye Hansen

Polyolefin coated steel pipes with high dynamic fracture toughness of the coating of the steel pipes during installation handling and in service, consisting of a steel pipe core, optionally an intermediate foamed plastic material, and a polyolefin coating of &#x3b2;-nucleated propylene copolymers whereby a test polyolefin pipe fabricated from the &#x3b2;-nucleated propylene copolymer has a critical pressure of &#x3e;25 bars and a dynamic fracture toughness &#x3e;3.5 MNm. The polyolefin coated steel pipes are suitable for off-shore transport of crude oil or gas products or district heating applications.

Polyolefin coated steel pipes

Process for producing single layer and multilayer polyolefin foam pipes with improved compression resistance having a polyolefin foam layer which consists of mixtures of modified propylene polymers having strain hardening behaviour or propylene homopolymers with a stereospecificity index &#x3e;98% or propylene copolymers with a stereospecificity index of the homopolymer matrix of &#x3e;96%. The polyolefin foam pipes include coated steel pipes for transporting crude oil or gas products or district heating applications, single layer pipes for insulation purposes and for non- or low-pressure applications and multilayer plastic pipes for the transportation of hot or cold fluids.

Singlelayer and multilayer polyolefin foam pipes

Single layer and multilayer polyolefin foam pipes with improved compression resistance have a polyolefin foam layer which consists of mixtures of modified propylene polymers having strain hardening behaviour or propylene homopolymers with a stereospecifity index &#x3e;98% or propylene copolymers with a stereospecifity index of the homopolymer matrix of &#x3e;96%. The polyolefin foam pipes are coated steel pipes for transporting crude oil or gas products or district heating applications, single layer pipes for insulation purposes and for non- or low-pressure applications and multilayer plastic pipes for the transportation of hot or cold fluids.

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Bleket, Sweden

Tony Lindstroem