Connection of internally lined pipelines

Pipe joints or couplings – With casing – lining or protector – Insulated

Reexamination Certificate

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Details

C285S047000, C285S055000, C285S370000, C029S272000

Reexamination Certificate

active

10502694

ABSTRACT:
An insert for use in connecting two lengths of pipe, each having a plastic liner. The insert consists of an inner tubular member of plastics material for connection at either end to the plastic liners of two pipe lengths, an insulating sleeve surrounding a central portion of the inner tubular member and a ring of heat-resistant material overlying a part of the insulating sleeve to be positioned, when in use, beneath a location at which the pipe length is butt welded, wherein the insulating sleeve includes an insulating material which is at least partially enclosed with a sheath, such that the sheath can be mechanically connected to the interior of one pipe length.

REFERENCES:
patent: 3508766 (1970-04-01), Berg et al.
patent: 4386629 (1983-06-01), Cook et al.
patent: 4913465 (1990-04-01), Abbema et al.
patent: 5104152 (1992-04-01), Galfant
patent: 5346261 (1994-09-01), Abbema
patent: 5348211 (1994-09-01), White et al.
patent: 5547228 (1996-08-01), Abbema et al.
patent: 5685572 (1997-11-01), Linton et al.
patent: 5984370 (1999-11-01), Lewis
patent: 0366 299 (1990-05-01), None

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