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US 7,534,321 B2Granted
System for joining sections of composite reinforced line pipe
AssigneeNCF Industries, Inc.
InventorNorman C. Fawley
Life of this patent
Estimating the term…
Abstract
A composite reinforced line pipe is manufactured by aligning first and second pipe segments each having a composite reinforcement wrapped circumferentially about a core, attaching the line pipes at a cut-back portion of their exposed core, wrapping a joint tape circumferentially about the cut-back portion, wrapping a resin reinforcement tape circumferentially about the joint tape, and curing the joint tape and resin reinforcement tape.
Claims9
A method comprising:
- aligning first and second pipe segments at a first end of each respective pipe segment, each pipe segment having a core and a composite reinforcement comprising a resin matrix with reinforcement fibers wrapped circumferentially around a substantial length of the core, each pipe segment further having a cut-back portion at the first ends in which the core is exposed;
- attaching the first pipe to the second pipe at the first ends;
- wrapping a composite joint tape circumferentially around the first pipe and second pipe at
- the cut-back portions such that fibers of the composite joint tape run substantially in a circumferential direction to provide hoop reinforcement to the first and second pipe
- segments at the cut-back portions;
- and
- curing the composite joint tape by heating the core to kick off cure of a resin in the composite joint tape.
4 more elements
A method comprising:
- aligning first and second pipe segments at a first end of each respective pipe segment, each segment having a metallic core and a composite reinforcement circumferentially surrounding the core, each pipe segment further having a cut-back portion at the first ends in which the core is exposed;
- attaching the first pipe to the second pipe at the first ends;
- wrapping a composite joint tape circumferentially around the first pipe and second pipe at the cut-back portions;
- and
- curing the composite joint tape by heating the metallic core to kick off cure of a resin in the composite joint tape.
2 more elements
The method of 5 wherein heating comprises:
- heating by induction.
Dependencies are inferred from the claim text.