Claims
- 1. A pipe joint having a pin portion with a tapered male thread formed on the outer peripheral surface of the end of a pipe, and a box portion having a tapered female thread formed on the inner peripheral surface of the end of a pipe or a short pipe so as to threadingly engage with the tapered male thread, characterized in that a clearance C between stab flanks of the threads is 0.5-1.0 mm, a thread stab flank angle θ is 15-60, thread crest surfaces and the thread root surfaces of threadingly engaged tapered male thread and tapered female thread are parallel to a pipe axis, and a radius R of stab flank corner portions of the male thread is 1.0-1.25 mm.
- 2. A pipe joint as set forth in claim 1, characterized in that a taper of an incomplete thread portion of the pin portion is 0.96-0.90 times a nominal taper of a complete thread portion of the pin portion.
- 3. A pipe joint as set forth in claim 1 characterized in that the joint is a coupling-type joint.
- 4. A pipe joint as set forth in claim 1 characterized in that the joint is an integral joint.
- 5. A pipe joint as set forth in claim 1 wherein the pipe joint is tightened in a state in which it is tilted 1-2 degrees to vertical.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2000-173732 |
Jun 2000 |
JP |
|
Parent Case Info
This application is a continuation of International Application PCT/JP01/04834, filed Jun. 8, 2001. This PCT application was not in English as published under PCT Article 21(2).
US Referenced Citations (11)
Foreign Referenced Citations (3)
Number |
Date |
Country |
4015385 |
Jan 1992 |
JP |
4157282 |
May 1992 |
JP |
11-223284 |
Aug 1999 |
JP |
Continuations (1)
|
Number |
Date |
Country |
Parent |
PCT/JP01/04834 |
Jun 2001 |
US |
Child |
10/313021 |
|
US |