Reproduction process of the existing pipeline

Details Reproduction process of the existing pipeline Reproduction process of the existing pipeline

1987-12-24

1989-01-10

Marcus, Stephen

Pipes and tubular conduits

Repairing

2940201, 405154, 405184, F16L 100

Patent

active

047966734

ABSTRACT:
A reproduction process for an existing pipeline whether underground or overground includes the inserting of at least one rigid inner pipe having its front end temporarily blocked, and advancing the rigid inner pipe within the existing pipeline by means of fluid pressure applied to the interior of said inner pipe, or to the end of said inner pipe. Preferrably a rust-proof binding substance between the inner pipe and the existing pipeline is provided to unify the two pipes and provide a new integral pipeline. The new rigid inner pipeline may be made in sections which may be welded together as they are being inserted and are preferrably provided with bumps or projections around the external surface of the new rigid inner pipe in a spiral form.

REFERENCES:
patent: 4314577 (1982-02-01), Brister
patent: 4640313 (1987-02-01), Stanley
patent: 4648746 (1987-03-01), Abinett

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