STEEL PIPE WITH RESIN LINING AND PROCESS FOR PRODUCING THE SAME

WIPO Patent Application WO/2006/054731

A1

A steel pipe with resin lining that can be used in place of conventional resin lined steel pipes produced by subjecting a molten metal plated steel pipe having its internal and external surfaces furnished with plating layers to internal surface lining with polyvinyl chloride and that excels in the adhesion between steel pipe and resin lining so as to be serviceable in, for example, a piping for water supply, hot-water supply, air conditioning, fire control, drainage, etc. over a period longer than in the prior art; and a process for producing the steel pipe with resin lining. There is provided a steel pipe with resin lining characterized in that at least an internal surface of steel pipe is furnished with a chemical treatment coating composed of phosphate crystals of ≤ 10 μm particle diameter, and that further a resin layer of polyolefin resin or crosslinked polyolefin resin is bonded via an adhesive layer to the internal surface of the steel pipe, and that thereafter the external surface of the steel pipe is furnished with a sprayed layer of a metal or alloy baser than iron. Further, there is provided a process for producing the steel pipe with resin lining.

FUNATSU SHINICHI (JP)
MIMURA HIROYUKI (JP)
KARIYAZONO YOSHIHISA (JP)

PCT/JP2005/021309

May 26, 2006

November 15, 2005

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NIPPON STEEL CORP (JP)
FUNATSU SHINICHI (JP)
MIMURA HIROYUKI (JP)
KARIYAZONO YOSHIHISA (JP)

C23C28/00; C23C22/13; F16L9/02

JP2003294174A	2003-10-15
JP2004068149A	2004-03-04
JP2004149896A	2004-05-27
JP2003183855A	2003-07-03

Aoki, Atsushi (ISHIDA & ASSOCIATES Toranomon 37 Mori Bldg., 5-1, Toranomon 3-chom, Minato-ku Tokyo, JP)

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