Pipe joints or couplings – With casing – lining or protector – Insulated
Reexamination Certificate
2004-11-16
2009-02-24
Dunwoody, Aaron M (Department: 3679)
Pipe joints or couplings
With casing, lining or protector
Insulated
C285S222100, C285S123150, C138S114000
Reexamination Certificate
active
07494155
ABSTRACT:
A thermally-insulated pipeline for the transportation of a cryogenic liquid, comprising three coaxial pipes formed of sections, one inner pipe made of a material having a low thermal expansion coefficient, a middle pipe and an outer pipe made of steel. The pipes are linked by linking parts which join sections of each respective pipe and take up the loads produced by thermal expansion or contraction when the pipes change temperature. The linking parts that join the inner pipe and the middle pipe are separated from the linking parts that join the middle and outer pipe, so that a thermal bridge cannot form between the inner pipe and the outer pipe.
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Dunwoody Aaron M
ITP
Steptoe & Johnson LLP
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