Title:
THREADED COUPLING FOR STEEL PIPE
Document Type and Number:
WIPO Patent Application WO/2020/195621
Kind Code:
A1
Abstract:
Provided is a threaded coupling for a steel pipe, which can be quickly and properly fastened. This threaded coupling comprises a steel pipe 20m, a steel pipe 20f, and a coupling 50 for fastening the steel pipes 20m and 20f to each other. The respective pipe main bodies 21m and 21f of the steel pipes 20m and 20f include an annular marking groove 23m and 23f formed on the outer circumference of the pipe main body 21m and 21f.
Inventors:
IWAMOTO MICHIHIKO (JP)
TOYOTA YUSUKE (JP)
KOCHI YASUHIRO (JP)
TOYOTA YUSUKE (JP)
KOCHI YASUHIRO (JP)
Application Number:
PCT/JP2020/009003
Publication Date:
October 01, 2020
Filing Date:
March 03, 2020
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
F16L15/04
Domestic Patent References:
| WO2018180218A1 | 2018-10-04 | |||
| WO2018180218A1 | 2018-10-04 | |||
| WO2018052141A1 | 2018-03-22 | |||
| WO2001086185A1 | 2001-11-15 | |||
| WO2008029957A1 | 2008-03-13 | |||
| WO2005040657A2 | 2005-05-06 |
Foreign References:
| JP2001214437A | 2001-08-07 | |||
| JP2004169812A | 2004-06-17 | |||
| JPH06109173A | 1994-04-19 | |||
| JP2013512393A | 2013-04-11 | |||
| US5233742A | 1993-08-10 | |||
| US4641410A | 1987-02-10 |
Other References:
See also references of EP 3951229A4
Attorney, Agent or Firm:
UEBA, Hidetoshi (JP)
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