Method of coating pipe

Details Method of coating pipe Method of coating pipe

1978-10-10

1980-07-08

Ansher, Harold

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156190, 156192, 156195, 15624413, 156392, 427189, 427195, 427375, 427386, F16L 1116, B65H 8100, B32B 1508

Patent

active

042115957

ABSTRACT:
Steel pipe is provided with protective coating by first applying a corrosion protective coating such as fused powdered epoxy resin or heat activated adhesive or butyl-based pressure-sensitive adhesive adhered to the pipe, then extruding or coextruding an outer polyolefin layer directly onto the corrosion protective coating. The coextrusion step may include an outer layer of high density polyethylene and an inner adherent layer of low density polyethylene, or an outer layer of polyethylene or polypropylene and an inner layer of a copolymer of ethylene or propylene and acrylic acid.

REFERENCES:
patent: Re30006 (1979-05-01), Sakayori et al.
patent: 2820249 (1958-01-01), Colombo
patent: 3402742 (1968-09-01), O'Brien
patent: 3616006 (1971-10-01), Landgraf et al.
patent: 3687765 (1972-08-01), MacLean et al.
patent: 3700520 (1972-10-01), Hielema
patent: 3802908 (1974-04-01), Emmons
patent: 3823045 (1974-07-01), Hielema
patent: 4026747 (1977-05-01), Delorean et al.
patent: 4078123 (1978-03-01), Costenoble
patent: 4145243 (1979-03-01), Cottam
patent: 4154876 (1979-05-01), Segawa et al.

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