| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a screw joint for a pipe which can suppress the generation of a high shouldering problem. SOLUTION: This screw joint for a pipe is constituted by screwing a pipe provided with a pin having a tapered external thread and a torque shoulder forming part in the end part and a pipe provided with a box having a tapered internal thread and a torque shoulder forming part in the end part. The pin is provided with an incomplete screw part positioned in a central part side of the pipe having the pin. The incomplete screw part and a screw part of a box corresponding to the incomplete screw part in a tightened condition are constituted so as to bring substantially only load surfaces of a thread ridge into contact with each other in fastening.</p> |
