Pipeline stopper plug and method therefore

Details Pipeline stopper plug and method therefore Pipeline stopper plug and method therefore

1995-01-06

1998-07-28

Ferensic, Denise L.

Pipes and tubular conduits

With closures and plugs

Inflation stem type

138 93, F16L 5512

Patent

active

057850909

ABSTRACT:
A stopper plug and method for making the same. A reinforcement spider is integrally laminated within a multi-layered plug formed from several plies of elastomeric and unidirectional reinforcement. The spider cooperates with end plates such that expansion of the plug causes both longitudinal contraction of the plug and radial expansion while concomitantly increasing the force by which the end plates are attached to the plug preventing delamination at that juncture. Two forms of plug are shown. One has capped endwalls provided with nipple outlets and one is provided with a throughflow central passageway.

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