Title:
継目無ベンド管の製造方法並びに溶接継手及びその製造方法
Document Type and Number:
Japanese Patent JP4941054
Kind Code:
B2
Abstract:
Provided are a seamless bent pipe constituted by a bent section and straight pipe sections on both ends of the bent section, with the inside diameter at each pipe end portion being larger than the inside diameter of the bent section, and a welded component comprising a seamless bent pipe and a seamless straight pipe at one or each end of the seamless bent pipe, with the end of the seamless straight pipe to be welded to one or each end of the seamless bent pipe having the same inside diameter as the inside diameter of the seamless bent pipe, as well as methods of manufacturing them. As a result, elements suited for use in pipelines can be obtained, without unnecessarily increasing the wall thickness of the seamless bent pipe and without internal machining of the pipe end portions of the seamless bent pipe after the manufacturing thereof.
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Inventors:
Arita Tsutomu
Application Number:
JP2007090399A
Publication Date:
May 30, 2012
Filing Date:
March 30, 2007
Export Citation:
Assignee:
SUMITOMO METAL INDUSTRIES,LTD.
International Classes:
F16L43/00; B21D7/00; B21D51/16
Domestic Patent References:
| JP3075794B2 | ||||
| JP3003538B2 | ||||
| JP7227629A | ||||
| JP10281355A | ||||
| JP2253088A | ||||
| JP6047450A | ||||
| JP9327732A | ||||
| JP5329535A | ||||
| JP56011111A | ||||
| JP2004223530A | ||||
| JP63256226A | ||||
| JP60238038A |
Attorney, Agent or Firm:
Mikiji Sugioka
Terutada Hogami
Chihara
Terutada Hogami
Chihara