Method of forming a protective coating on metallic pipe

Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor

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Details

156195, 156337, B29C 6310

Patent

active

051203812

ABSTRACT:
A continuous strip non-shielding and pressure-resistant wrapping material for protecting buried metallic pipe is disclosed. The wrapping material comprises a continuous layer of cold-flowable rubberized bitumen bonded to a substantially non-elastic porous support backing with a release film positioned on the exposed face of the bitumen to protect the bitumen prior to application. When applied to a metallic pipe, the protective bitumen is secured to and held in place by the non-elastic support backing and thus cannot sag away from the pipe. The porous support backing provides potential electric current paths through each pore so that cathodic protection can be effectively utilized to protect against corrosion in even the smallest holiday in the bitumen layer.

REFERENCES:
patent: 30889 (1882-03-01), McNulty
patent: 1867984 (1932-07-01), Pistor
patent: 2650619 (1953-09-01), Pflaumer
patent: 2828798 (1958-04-01), Hopkins et al.
patent: 3388723 (1968-06-01), McNulty
patent: 4192697 (1980-03-01), Parker et al.

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