THREADED JOINT FOR PIPE AND METHOD FOR PRODUCING THREADED JOINT FOR PIPE

Title:

THREADED JOINT FOR PIPE AND METHOD FOR PRODUCING THREADED JOINT FOR PIPE

Document Type and Number:

WIPO Patent Application WO/2018/216497

Kind Code:

A1

Abstract:

The present invention provides a threaded joint for pipes that has excellent misalignment resistance, high torque-on-shoulder resistance, and excellent corrosion resistance, and a method for producing the same. This threaded joint for pipes comprises a pin (13) and a box (14). The pin (13) and the box (14) each have a threaded part (15, 20) and a contact surface (130, 140) including a non-threaded metal contact part. The threaded joint for pipes comprises, on the contact surface (130, 140) of the pin (13) and/or the box (14), a surface roughness, a Zn-Ni alloy plating layer (21), a Cu-Sn-Zn alloy plating layer (22), and a solid lubricating film layer (23). These are layered in the order of the surface roughness, the Zn-Ni alloy plating layer (21), the Cu-Sn-Zn alloy plating layer (22), and the solid lubricating film layer (23) from the contact surface (130, 140) side.

Inventors:

GOTO KUNIO (JP)

Application Number:

PCT/JP2018/018221

Publication Date:

November 29, 2018

Filing Date:

May 10, 2018

Export Citation:

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Assignee:

NIPPON STEEL & SUMITOMO METAL CORP (JP)
VALLOUREC OIL & GAS FRANCE (FR)

International Classes:

F16L15/04; C10M107/38; C10M145/18; C10M149/16; C23C28/00; C25D5/10; C25D5/26; C25D5/36; C25D7/04; F16L15/00; F16L58/08; C10N20/00; C10N30/00; C10N30/06; C10N30/12; C10N40/00

Domestic Patent References:

WO2017047722A1	2017-03-23
WO2014042144A1	2014-03-20

Foreign References:

JP2015506445A	2015-03-02
JPS5817285A	1983-02-01
JP2013087829A	2013-05-13
JP2008069883A	2008-03-27
JP2002221288A	2002-08-09
JP2008215473A	2008-09-18

Other References: