| 摘要 |
PROBLEM TO BE SOLVED: To provide a pipe joint used for a large-diameter oil cell pipe and a civil engineering pile joint constituted of a screw dimension holding the high jump-out resistance even in a large-diameter tapered screw joint having a low yield ratio and a large homogeneo growth so as to have possibility of the jump- out. SOLUTION: When the outside diameter of a pipe 12 is set to D =340 mm (13-3/8 in)-661 mm (26 in), the thickness of the pipe 12 is set to t (mm), the depth of cut of the screw from the outer surface 10 of the pipe 12 is set to x (mm), the taper of the screw is set to T=1/12-1/10, the screw thread is et to H (mm), and the screw pitch is set to p (n/in), the following relational expressions are satisfied: H>(p/4)/0.8 X>0.00575×D+1.6×t×T-(2/3)×H.
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