Coating processes – Spray coating utilizing flame or plasma heat – Organic containing coating
Patent
1996-10-08
1998-08-11
Pianalto, Bernard
Coating processes
Spray coating utilizing flame or plasma heat
Organic containing coating
427142, 427203, 427270, 427271, 427287, 427292, 427318, 427327, 427355, 427410, 427435, 427442, 4274432, B05D 102
Patent
active
057925186
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
It is common practice to coat sections of new pipelines off-site in a pipe manufacturing operation or at a site other than in-line on the pipeline, to protect the pipeline from corrosion or mechanical damage. Typical coatings Include fusion bonded epoxy powder, extruded bitumen polyethylene combinations, tape wraps, coal tar enamels or liquid thermoset materials. After assembly or construction of the pipeline there are sections such as steel pipeline girth welds, steel valves and other steel pipeline fittings and assemblies that also require coating for protection from corrosion or mechanical damage. A wide variety of portable, field-applied coatings are available to protect the new sections of the pipeline. It is important for the long term protection of the pipeline that all sections of the pipeline have a viable coating.
Such new field-applied coatings can include, for example, tape wraps comprising polyethylene film/butyl rubber elastomer combinations, polyvinyl chloride filmbitumen rubber elastomer combinations, or petroleum, all of which may be applied either mechanically or by hand to the substrate; heat-shrink sleeves which can be applied by hand to the substrate and then heated by torch to Induce their shrinking properties: fusion bonded apoxy powders which are mechanically applied only to a round girth weld or similar round structure; and twopart liquid epoxies which require either hand or mechanical mixing before being applied either by brush, by railer or by airless spray equipment.
In addition to the above, a wide variety of portable, field-applied coatings are in use to recoat previously coated, and partially protected, aged metallic substrate. These include older and In service steel pipeline girth welds, replacement steel valves, steel pipeline fittings and assemblies and steel line pipe, all of which may have damaged coatings. Such aged substrates are normally coated with e.g. mill-applied fusion bonded epoxy powder, mill-applied extruded bitumen/polyethylene tape wraps, liquid coat tar enamels, liquid apoxes, or liquid urethane. The recoat coatings can include tape wraps, e.g. comprising polyethylene film/butyl rubber elastomer combinations, polyvinyl chloride film/bitumen rubber elastomer combinations or petroleum, all of which can be applied either mechanically or by hand to the substrate; heat-shrink sleeves which may be applied either mechanically or by hand to the substrate. and then heated by torch to induce their shrinking properties: fusion bonded epoxy powders which are mechanically applied only to a round girth weld or similar round structure; two-part liquid poxies which require either hand or mechanical mixing avid are then applied either by brush, by roller or by airless spray equipment; and modified liquid urethane which require either hand or mechanical mixing and then are applied either by brush, by roller or by airless spray equipment.
Portable, field-applied coatings may also be applied to new metallic substrates such as steel pipeline girth welds and other steel pipeline fitting. and assemblies, on mill-coated, two and three layer, composite coated, straight line pipe, Examples of such pipe are produced by Shaw Pipe Protection Limited of Canada, Elf Atochem of France and Mannesmann AG of Germany. These field-applied coatings can include: tape wraps comprising polyethylene film/butyl rubber elastomer combinations, polyvinyl chloride film/bitumen rubber elastomer combinations or petroleum, all of which can be applied either mechanically or by hand to the substrate; and heat-shrink sleeves which can be applied by hand to the substrate and then heated by torch to induce their shrinking properties.
Where the substrate is concrete, a wide variety of portable, hold-applied coatings are in use to protect new and aged concrete substrates such as walls, floors and other containment structures from acidic environments or to protect marine pilings from salt water corrosion. Such new and recoat coatings can include: liners comprising polyethylene film/bu
REFERENCES:
patent: 2366718 (1945-12-01), Guzzetta
patent: 2716075 (1955-08-01), Wiese
patent: 2718473 (1955-09-01), Powers
patent: 3502492 (1970-03-01), Spiller
patent: 4312902 (1982-01-01), Murase et al.
patent: 4786339 (1988-11-01), Meyer et al.
patent: 4990383 (1991-02-01), Bergstrom et al.
patent: 5073414 (1991-12-01), Castro
patent: 5178902 (1993-01-01), Wang et al.
Fogh Kenneth
Gibson Mark
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