Method of lining pipes

Details Method of lining pipes Method of lining pipes

1975-11-11

1978-07-18

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

264102, 264344, B29D 900, B29G 700

Patent

active

041016238

ABSTRACT:
A method of lining a pipe with thermosetting synthetic plastics material including the steps of arranging the pipe with its longitudinal axis inclined at an acute angle to the horizontal, introducing liquid lining material into the pipe at a predetermined rate for a predetermined time, shifting the pipe to a horizontal position shortly before or at the completion of introduction of the liquid material, spinning the pipe about its axis and blowing hot air axially through the pipe after spinning has started but before the lining material has set thereby to remove entrained air bubbles. The method is particularly applicable for lining pipes with polyurethane, especially pipes with end flanges and covers to form an end face of the lining material.

REFERENCES:
patent: 1620831 (1927-03-01), Moore
patent: 1678641 (1928-07-01), Holthaus
patent: 1802613 (1931-04-01), Millspaugh
patent: 2344020 (1944-03-01), Boucher
patent: 2675333 (1954-04-01), Tront et al.
patent: 3290426 (1966-12-01), Barrentine
patent: 3584105 (1971-06-01), Pekor

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