Unbonded reinforced plastic pipe
AssigneePolyflow LLC
InventorsMatthew Carney, Spencer Green, Raymond Nicholas Burke
Life of this patent
Estimating the term…
Abstract
Pipe body for an unbonded reinforced thermoplastic pipe (uRTP), the pipe body including a fluid retaining liner, an intermediate layer located radially outwardly of the fluid retaining liner, and a protective sheath located radially outwardly of the intermediate layer. The pipe body includes an end portion for terminating the pipe body at an end fitting. At the end portion, the intermediate layer is bonded to the fluid retaining liner. Away from the end portion, the intermediate layer remains unbonded to the fluid retaining liner.
Claims14
A pipe body for an unbonded reinforced thermoplastic pipe (uRTP) comprising:
- a fluid retaining liner;
- an intermediate layer located radially outwardly of the fluid retaining liner;
- and
- a protective sheath located radially outwardly of the intermediate layer;
- wherein the pipe body comprises an end portion for terminating the pipe body at an end fitting, wherein, at the end portion, the intermediate layer is bonded directly to the fluid retaining liner, and, away from the end portion, the intermediate layer remains unbonded to the fluid retaining liner;
- and
- wherein one or more:
- the intermediate layer comprises reinforcement filaments within a thermoplastic matrix, or bonded to a thermoplastic tape;
- the intermediate layer comprises windings of at least one tape element comprising reinforcement filaments within a thermoplastic matrix, or bonded to a thermoplastic tape;
- and/or
- the pipe body further comprises a cover layer located radially outwardly of the intermediate layer at the end portion.
An unbonded reinforced thermoplastic pipe (uRTP) comprising:
- a pipe body comprising:
- a fluid retaining liner;
- an intermediate layer comprising reinforcement filaments within a thermoplastic matrix, or bonded to a thermoplastic tape, and being located radially outwardly of the fluid retaining liner;
- a protective sheath located radially outwardly of the intermediate layer;
- and
- an end fitting;
- wherein the pipe body comprises an end portion for terminating the pipe body at the end fitting;
- wherein, at the end portion, the intermediate layer is bonded directly to the fluid retaining liner, and, away from the end portion, the intermediate layer remains unbonded to the fluid retaining liner;
- and
- wherein, the end portion is inserted into an annular recess in the end fitting which is swaged onto the end portion of the pipe body.
A method of manufacturing a pipe body for an unbonded reinforced thermoplastic pipe (uRTP) comprising:
- locating an intermediate layer radially outwardly of a fluid retaining liner;
- locating a protective sheath radially outwardly of the intermediate layer;
- and
- bonding the intermediate layer directly to the fluid retaining liner at an end portion of the pipe body, such that the intermediate layer remains unbonded to the fluid retaining liner away from the end portion, the end portion being for terminating the pipe body at an end fitting;
- wherein one or more:
- the intermediate layer comprises reinforcement filaments within a thermoplastic matrix, or bonded to a thermoplastic tape;
- the fluid retaining liner comprises windings of at least one tape element and locating the intermediate layer radially outwardly of the fluid retaining liner includes winding the at least one tape element around the fluid retaining liner at an angle of between approximately 15° and 90° with respect to a central axis of the pipe body;
- and/or
- the method further comprises applying or locating a cover layer radially outwardly of the intermediate layer at the end portion.
Dependencies are inferred from the claim text.