Couplings for non-ferrous pipe

Pipe joints or couplings – With fluid pressure seal – Flexible lip

Patent

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Details

285353, 285369, 285423, 285DIG16, 285156, 285179, A16L 1702

Patent

active

045374260

ABSTRACT:
A non-ferrous pipe coupling comprises tubular threaded male and female coupling elements attached to ends of respective pipe sections. The male element terminates in a cylindrical non-threaded, non-tapering sealing surface adjacent its threads and the female coupling element, which may be filament-wound, includes an internal sealing sleeve or liner with a web that provides a lip seal around the cylindrical sealing surface of the male element. The web is urged into sealing engagement with the cylindrical surface by fluid pressure within the coupling. The liner precludes egress of fluid from within the coupling through the female coupling element.

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