Borealis Gmbh

National Oilwell Varco Denmark L/s

National Oilwell Varco Denmark I/s

Allan Boye Hansen

Carl-Gustaf Ek

Achim Hesse

Inger-Margrete Procida

Cecilia Rydin

Tony Lindstroem

Disclosed is an unbonded flexible pipe for subsea transportation of fluids. The pipe has a length and a centre axis and includes a plurality of layers including at least one polypropylene based layer including a modified polypropylene compound including: at least about 50% by weight of a base polypropylene (base PP) which consists of polypropylene including up to about 10% by weight of one or more co-monomers other than propylene, and at least about 1% by weight of a plastomer including a propylene and at least one co-monomer other than propylene.

Unbonded flexible pipe

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

Growing community of inventors

Sandefjord, Norway

Allan Boye Hansen