Title:
WELDED TITANIUM PIPE AND WELDED TITANIUM PIPE MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2015/141532
Kind Code:
A1
Abstract:
A welded titanium pipe (1) which enables improving heat conductivity and detecting surface defects, and a manufacturing method thereof are provided. This welded titanium pipe (1) is made by forming a titanium plate into a tubular shape and welding the edges thereof together. On the outer and/or inner peripheral surface of the welded titanium pipe (1), an uneven pattern is formed having a base surface (3) and multiple protrusions (2). The protrusions have an average maximum height of 12-45μm. The ratio of the maximum value to the average value of the pitch of the protrusions (2) is less than 2, the ratio of the average of the maximum dimension of the protrusions (2) to the average value of the pitch is 0.90 or less, and the ratio of the average maximum height to the thickness is 0.11 or less.
Inventors:
TAMURA KEITARO
FUJII YASUYUKI
ITSUMI YOSHIO
OYAMA HIDETO
FUJII YASUYUKI
ITSUMI YOSHIO
OYAMA HIDETO
Application Number:
PCT/JP2015/057088
Publication Date:
September 24, 2015
Filing Date:
March 11, 2015
Export Citation:
Assignee:
KOBE STEEL LTD (JP)
International Classes:
F16L9/02; B21D51/18; B21D53/06; B23K9/23; F28F1/12; F28F21/08
Domestic Patent References:
| WO2013039214A1 | 2013-03-21 |
Foreign References:
| JPH0978164A | 1997-03-25 | |||
| JP2009082933A | 2009-04-23 | |||
| JP2006284166A | 2006-10-19 | |||
| JP2004301459A | 2004-10-28 | |||
| JP2014126266A | 2014-07-07 |
Other References:
See also references of EP 3121498A4
Attorney, Agent or Firm:
KOTANI, Etsuji et al. (JP)
Etsuji Kotani (JP)
Etsuji Kotani (JP)
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