Title:
二重管及び二重管の製造方法並びに蒸気発生器
Document Type and Number:
Japanese Patent JP5881421
Kind Code:
B2
Abstract:
A double-walled tube includes: a plurality of double-walled tube forming members, each having an inner tube and an outer tube, connected by welding at welding portions of axis direction end portions thereof; and each of the welding portions of the double-walled tube forming members including a groove having a length in an axis direction set to be equal to or greater than 1/2 of a width of a weld bead formed by the welding at the welding portion.
Inventors:
Takehisa Hino
Tamura Masataka
Yoshimi Tanaka
Wataru Kono
Toru Sakamoto
Terashima Toshinori
Katsuhiko Sato
Jimbo Noboru
Shigeki Maruyama
Tamura Masataka
Yoshimi Tanaka
Wataru Kono
Toru Sakamoto
Terashima Toshinori
Katsuhiko Sato
Jimbo Noboru
Shigeki Maruyama
Application Number:
JP2011550860A
Publication Date:
March 09, 2016
Filing Date:
January 20, 2011
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
B23K26/21; B23K9/00; B23K9/028; B23K33/00; F28D7/10; F28F11/00; G21D1/00
Domestic Patent References:
| JP2009220179A | 2009-10-01 | |||
| JPH08118042A | 1996-05-14 | |||
| JPS6121493A | 1986-01-30 |
Attorney, Agent or Firm:
Patent Business Corporation Sakura International Patent Office