- 专利标题: THREADED JOINT FOR PIPE AND METHOD FOR MANUFACTURING THREADED JOINT FOR PIPE
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申请号: EP17861334.5申请日: 2017-10-02
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公开(公告)号: EP3531001A1公开(公告)日: 2019-08-28
- 发明人: KIMOTO, Masanari , OSHIMA, Masahiro
- 申请人: Nippon Steel & Sumitomo Metal Corporation , Vallourec Oil and Gas France
- 申请人地址: 6-1, Marunouchi 2-chome Chiyoda-ku Tokyo 100-8071 JP
- 专利权人: Nippon Steel & Sumitomo Metal Corporation,Vallourec Oil and Gas France
- 当前专利权人: Nippon Steel & Sumitomo Metal Corporation,Vallourec Oil and Gas France
- 当前专利权人地址: 6-1, Marunouchi 2-chome Chiyoda-ku Tokyo 100-8071 JP
- 代理机构: J A Kemp
- 优先权: JP2016204709 20161018
- 国际公布: WO2018074212 20180426
- 主分类号: F16L15/04
- IPC分类号: F16L15/04 ; C25D5/26 ; C25D5/48 ; C25D7/04
摘要:
There is provided a threaded connection for pipe having an excellent galling resistance and an excellent appearance. A threaded connection for pipe according to the present embodiment includes a pin (3) and a box (4). The pin (3) and the box (4) have contact surfaces (34) and (44) that include thread parts (31) and (41), metal seal parts (32) and (42), and shoulder parts (33) and (43), respectively. The threaded connection for pipe includes a Zn-Ni alloy plating layer (100) on the contact surface (34) or (44) of at least one of the pin (3) and the box (4). The Zn-Ni alloy plating layer (100) contains Cu. The Cu content of the Zn-Ni alloy plating layer (100) is 4.5% by mass or less (zero excluded).
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