Invention Grant
- Patent Title: Threaded joint for steel pipe
- Patent Title (中): 钢管螺纹接头
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Application No.: US11547067Application Date: 2005-04-05
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Publication No.: US07866706B2Publication Date: 2011-01-11
- Inventor: Kunio Goto , Ryuichi Imai , Yasuhiro Ogawa , Junichi Minami
- Applicant: Kunio Goto , Ryuichi Imai , Yasuhiro Ogawa , Junichi Minami
- Applicant Address: JP Osaka
- Assignee: Sumitomo Metal Industries, Ltd.
- Current Assignee: Sumitomo Metal Industries, Ltd.
- Current Assignee Address: JP Osaka
- Agency: Clark & Brody
- Priority: JP2004-112030 20040406
- International Application: PCT/JP2005/006672 WO 20050405
- International Announcement: WO2005/098300 WO 20051020
- Main IPC: F16L15/00
- IPC: F16L15/00

Abstract:
A threaded joint for a steel pipe comprises a pin and a box with a contact surface having a threaded part and a unthreaded metal contact part, wherein a solid lubricating film containing one or more kinds of lubricating powders selected from graphite, mica, calcium carbonate and kaolin, a copper powder, and a binder is formed on at least one contact surface of the pin and the box. An object of the present invention is to provide a threaded joint for a steel pipe which allows for repeated fastening and loosening of a threaded joint without adversely influencing on a human body and environment, and is excellent in galling resistance, rust preventing property and gas tightness.
Public/Granted literature
- US20080277925A1 Screw Joint for Steel Pipe and Process for Manufacturing Thereof Public/Granted day:2008-11-13
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