Plastic and nonmetallic article shaping or treating: processes – Forming structural installations in situ – Sequentially molding in situ different portions or layers on...
Patent
1991-10-04
1993-07-27
Aftergut, Karen
Plastic and nonmetallic article shaping or treating: processes
Forming structural installations in situ
Sequentially molding in situ different portions or layers on...
118408, 118DIG10, 138 97, 138 98, 264 35, 264 36, 264 37, 264 401, 264255, 264265, 264269, 264312, 405155, 405156, 405157, 427230, 427238, 427239, B29C 4700, B32B 3500, F16L 5518, F16L 5800
Patent
active
052308421
ABSTRACT:
To rehabilitate an internally corroded underground pipeline, excavations are made at its opposite ends to which launching and receiving pipe structures are then secured. Various pig member sets, with appropriate treatment fluids carried thereby, are air-driven through the entire length of the pipeline to successively acid clean, etch, and neutralize its interior surface. The interior pipeline surface is then thoroughly dried by flowing dehydrated air through the pipeline. Specially designed leading and trailing extruder pigs, with 100% solid, high viscosity, solvent-free epoxy coating material therebetween, are then air-driven through the pipeline to extrude a first protective coating layer onto its interior surface. The first layer is then dried with dehydrated air. Additional layers are then extruder pig-applied, and similarly dried, to form a relatively thick interior pipeline coating that protects the pipeline against further interior corrosion and also forms, in effect, a "pipe within a pipe" that provides the now rehabilitated pipeline with substantial structural reinforcement from within.
REFERENCES:
patent: 2808852 (1957-10-01), Brant
patent: 2908248 (1959-10-01), Brant
patent: 3108012 (1963-10-01), Curtis
patent: 3125464 (1964-03-01), Harmes
patent: 3307996 (1967-03-01), Keneipp, Jr.
patent: 3334389 (1967-08-01), Matheny
patent: 3394025 (1968-07-01), McCune
patent: 3556831 (1971-01-01), Schinabeck
patent: 3655122 (1972-04-01), Brown et al.
patent: 3753766 (1973-08-01), Brown et al.
patent: 3920363 (1975-11-01), Nelson Holland
patent: 3960644 (1976-06-01), McFadden
patent: 4178875 (1979-12-01), Moschetti
patent: 4216738 (1980-08-01), Muta
patent: 4318835 (1982-03-01), Clarke
patent: 4327132 (1982-04-01), Shinno
patent: 4425385 (1984-01-01), Coulter et al.
patent: 4439469 (1984-03-01), Wood
patent: 4455329 (1984-06-01), Snow
patent: 4526813 (1985-07-01), Wu
patent: 4556580 (1985-12-01), Kamuro et al.
patent: 4609686 (1986-09-01), Giordano, Jr. et al.
patent: 4741795 (1988-05-01), Grace et al.
patent: 4798474 (1989-01-01), Daily
Instituform Brochure-Insituform Mid-America, Inc.-16 pages.
Sanjet Brochure-Ucisco-7 pages.
Internal Pipeline Corrosion Controlled with in Situ Coating Service Brochure-3 pages.
Replace Plant Pipes without Digging Brochure-Mid America, Inc. 4 pages.
Driscopipe 9100 Brochure-20 pages.-Phillips Driscopipe Co.
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