Composite pipe
AssigneeMagma Global Limited
InventorsRichard Damon Goodman Roberts, Charles Alexander Tavner, Martin Peter William Jones
Life of this patent
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Abstract
A pipe comprises a pipe wall formed of a composite material of a matrix and a plurality of reinforcing fibres embedded within the matrix, wherein the composite material in at least one region of the pipe wall is pre-stressed. The composite material in at least one region of the pipe wall comprises or defines at least one of a level of pre-tension and pre-compression.
Claims28
A pipe having a pipe wall comprising a composite material formed of at least a matrix and a plurality of reinforcing fibers embedded within the matrix, wherein a variable tension is applied along the plurality of reinforcing fibers of the composite material during manufacture of the pipe to establish a varying level of pre-stress between different regions of the pipe wall,
- wherein the level of pre-stress within the composite material of the pipe wall varies throughout the pipe wall in a radial direction, such that the composite material in an outer region or layer of the pipe wall comprises or defines a different level of pre-stress than the composite material in an inner region or layer of the pipe wall.
A method for manufacturing a pipe, comprising:
- forming a pipe wall with a composite material comprising a matrix and a plurality of reinforcing fibers embedded within the matrix;
- and
- applying a variable tension along the plurality of reinforcing fibers of the composite material during manufacture of the pipe:
- and
- establishing a varying level of pre-stress in the composite material between different regions of the pipe wall.
Dependencies are inferred from the claim text.