Pipe in pipe assembly
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United States of America Patent
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Feb 26, 2002
Issued Date -
N/A
app pub date -
Feb 28, 2000
filing date -
Feb 28, 2000
priority date (Note) -
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Abstract
A pipe in pipe assembly. A coupling is used to join the ends of the inner pipe. The inner pipe is centralized within the inner pipe to provide axial resistance but minimum restraint transverse to the axis of the assembly. This provides sufficient flexibility of the inner pipe to accommodate the necessary tolerances to permit the use of the coupling. The inner pipe may be centralized within the outer pipe by the use of foam injected between the inner and outer pipe and a corrugated web sleeve around the ends of the inner pipe. The inner pipe may also be centralized within the outer pipe by the use of a corrugated web bulkhead that fits around the inner pipe and within the outer pipe.
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