Title:
HEAT TRANSFER TUBE FOR STEAM GENERATOR AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2012/001882
Kind Code:
A1
Abstract:
Disclosed is a heat transfer tube for a steam generator, wherein the surface roughness of the inner surface of a tube is measured in the longitudinal direction, and the dimensional variability in the measured roughness curve at a 50 mm region is 4 µm or less, and amount of bending in a portion having a length of 1,000 mm from an end of the tube is 1 mm or less, so that an eddy-current inspection can be performed at a high S/N ratio when a tube is produced, and the inspection efficiency can be improved, and furthermore, when the tube is incorporated in a heat exchanger, the incorporation operation can be easily performed. It is preferable that the heat transfer tube for a steam generator is produced by processes including a cold working process wherein a drawing process is performed using a high-pressure lubricant having a pressure of 40 MPa or more, a solution heat treatment process, and a straightening process using a roll straightener. Furthermore, regarding the roll straightener, using a roll straightener wherein at least five pairs of drum-shaped straightening rolls which are vertically opposed to each other and which have rotation axes intersecting each other, is preferable.
Inventors:
TOYODA MASATOSHI (JP)
KURODA KOUICHI (JP)
KURODA KOUICHI (JP)
Application Number:
PCT/JP2011/003194
Publication Date:
January 05, 2012
Filing Date:
June 07, 2011
Export Citation:
Assignee:
SUMITOMO METAL IND (JP)
TOYODA MASATOSHI (JP)
KURODA KOUICHI (JP)
TOYODA MASATOSHI (JP)
KURODA KOUICHI (JP)
International Classes:
F28F1/00; B21C3/10; B21C9/00; B21D3/02; C22C19/05; C22C38/00; C22C38/58; C22F1/10; F28F1/40; F28F21/08; C22F1/00
Domestic Patent References:
| WO1995028239A1 | 1995-10-26 | |||
| WO2007119817A1 | 2007-10-25 | |||
| WO2007119817A1 | 2007-10-25 |
Foreign References:
| JP2006064211A | 2006-03-09 | |||
| JP2005144479A | 2005-06-09 | |||
| JPS55103222A | 1980-08-07 | |||
| JP2010138473A | 2010-06-24 | |||
| JPH0318419A | 1991-01-28 | |||
| JP2000317521A | 2000-11-21 | |||
| JP2006272396A | 2006-10-12 | |||
| JP2004330297A | 2004-11-25 | |||
| JPH0318419A | 1991-01-28 | |||
| JP2000317521A | 2000-11-21 |
Other References:
See also references of EP 2587206A4
Attorney, Agent or Firm:
MORI, Michio et al. (JP)
Woods Michio (JP)
Woods Michio (JP)
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Claims: