Method and a coupler for joining two steel pipes

Metal working – Method of mechanical manufacture – Assembling or joining

Reexamination Certificate

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Details

C029S450000, C029S451000, C285S055000, C285S351000, C285S363000, C285S382400, C277S608000, C277S626000

Reexamination Certificate

active

07107662

ABSTRACT:
A method and apparatus for coupling together the ends of two steel pipe sections, each of which contains a permeable inner liner, in which not only are the pipe ends held in abutting engagement, but gas contained within the liner of one pipe section is effectively channeled into the liner of the other pipe section.

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