Flexible underwater pipe including a layer including a polyethylene having enhanced heat resistance
AssigneeTechnip France
InventorFrédéric Tronc
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Abstract
A flexible underwater pipe for transporting hydrocarbons, including a plurality of layers, at least one of which includes a polyethylene having enhanced heat resistance, to its preparation method and to its use for transporting hydrocarbons.
Claims15
A method for transporting hydrocarbons wherein the hydrocarbons are transported at a temperature greater than 60° C. and at a pressure greater than 200 bar in a flexible underwater pipe comprising a plurality of layers, at least one layer of which comprises a polymeric matrix comprising a polyethylene with enhanced heat resistance for which the melt index measured at 190° C. under a mass of 5.0 kg is less than 2.0 g/10 min, the density is greater than 0.945 g/cm3, the threshold yield strength is between 20 and 30 MPa, and the elongation at break is greater than 300%,
- wherein the polyethylene with enhanced heat resistance meets ASTM F2769-10 revised in 2010 or meets ISO 24033 revised in 2009,
- and
- wherein the at least one layer, the polymeric matrix of which comprises the polyethylene with enhanced heat resistance, withstands blistering as measured according to the standard API17J.
Dependencies are inferred from the claim text.