Title:
THREADED JOINT FOR PIPE, AND MANUFACTURING METHOD OF THREADED JOINT FOR PIPE
Document Type and Number:
WIPO Patent Application WO/2017/110685
Kind Code:
A1
Abstract:
A threaded joint for a pipe is provided which has excellent misalignment resistance and suitable shoulder ring torque, and which further has excellent corrosion resistance and excellent adhesion to a solid lubricant film; also provided is a manufacturing method of said threaded joint for a pipe. This threaded joint for a pipe is provided with a pin (13) and a box (14). The pin (13) and the box (14) have a contact surface that includes a thread portion (15) and (20) and an unthreaded metal contact portion. Disposed on the contact surface of the pin (13) and/or of the box (14), the threaded joint for a pipe comprises an alloy plating layer (21) of a Zn-Ni alloy, a phosphate film (22), and a solid lubricant film (23). The alloy plating layer (21), the phosphate film (22) and the solid lubricant film (23) are laminated in that order from the contact surface side.
Inventors:
GOTO KUNIO (JP)
KIMOTO MASANARI (JP)
KIMOTO MASANARI (JP)
Application Number:
PCT/JP2016/087610
Publication Date:
June 29, 2017
Filing Date:
December 16, 2016
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
VALLOUREC OIL & GAS FRANCE (FR)
VALLOUREC OIL & GAS FRANCE (FR)
International Classes:
F16L15/04; C23C22/18; C23C28/00; C25D5/26; C25D7/00
Domestic Patent References:
| WO2009057754A1 | 2009-05-07 | |||
| WO1996010710A1 | 1996-04-11 |
Foreign References:
| JP2002327874A | 2002-11-15 | |||
| JP2008527249A | 2008-07-24 | |||
| JP2008537062A | 2008-09-11 | |||
| JP2004053013A | 2004-02-19 | |||
| JP2008215473A | 2008-09-18 | |||
| JPH08105582A | 1996-04-23 |
Other References:
See also references of EP 3396222A4
Attorney, Agent or Firm:
ASCEND IP LAW FIRM (JP)
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