Method for cleaning and coating water-conducting pipes

Details Method for cleaning and coating water-conducting pipes Method for cleaning and coating water-conducting pipes

1989-02-03

1991-09-03

Bell, Janyce

Coating processes

Interior of hollow article coating

Removing excess coating material

1510431, 153161, 134 3, 134 2212, 134 28, 134 36, 134 37, 134 39, 134 40, 427230, 427236, 427238, 427239, 427299, 427327, 427421, B05D 722, B05D 300

Patent

active

050453521

ABSTRACT:
A method of cleaning and coating water conducting pipes is provided wherein a mixture of water and compressed air is forced through the emptied pipe system to rough clean such system, a pressurized acid is introduced into the pipe system and allowed to react with the interior surface of the pipes for a predetermined period of time. The acid is then drained from the pipes, and the interior of the pipes is dried by compressed air. A pressurized liquid plastic is then introduced into the pipes to coat the pipes with the excess plastic being subsequently drained from the pipe system.

REFERENCES:
patent: 3003899 (1961-10-01), Eberhard et al.
patent: 4216738 (1980-08-01), Muta
patent: 4425385 (1984-01-01), Coulter
patent: 4508577 (1985-04-01), Conn et al.
patent: 4786525 (1988-11-01), Kayser et al.

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