Reinforced flanges on plastic pipe

Details Reinforced flanges on plastic pipe Reinforced flanges on plastic pipe

1992-03-10

1992-12-15

Arola, Dave W.

Pipe joints or couplings

With assembly means or feature

Molded joint facilitator

285 55, 285363, 285423, 138109, F16L 4702

Patent

active

051710412

ABSTRACT:
A method an apparatus are shown for forming a flange on an end of a plastic pipe liner of the type used to line a tubular member. A reinforced disc having a rigid portion and an elastomeric portion is placed about the liner exterior and moved into position flush with the flanged end of the tubular member. A retaining ring is placed about the reinforced disc and the disc and liner exposed end are heated to render the materials malleable. A forming unit is then used to apply force to the liner to flow the liner into a reformed shape having a greater external diameter than the remainder of the liner. The forming operation also bonds the reinforced disc to the reformed liner end to further resist any tendency of the liner end to be retracted into the interior of the tubular member.

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