Continuous process for lining pipes

Details Continuous process for lining pipes Continuous process for lining pipes

1974-11-04

1977-05-24

Smith, Ronald H.

Coating processes

Interior of hollow article coating

Rotating the article

260 775AA, 427234, 427239, B05D 722

Patent

active

040256707

ABSTRACT:
A continuous process for lining pipes with thermosettable polymer made from prepolymer and curing agent, comprising the steps of: heating and degassing the prepolymer and storing it in a first storage tank; providing the curing agent in liquid form at a curing temperature in a second storage tank; recycling the prepolymer and the curing agent between the storage tanks and a mixing head which is selectively operable to mix and discharge the reagents; arranging each pipe with its longitudinal axis inclined at an angle to the horizontal; introducing a selected amount of the polymer mixture into the pipe at a predetermined rate so that the liquid material flows down along the pipe; and shifting the pipe to a horizontal position and spinning the pipe about its axis to distribute the material, spinning continuing until the material has set.

REFERENCES:
patent: 2319657 (1943-05-01), Brown
patent: 3498820 (1970-03-01), Hawkins

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