Patent ID: 9568126
Date: 2017-02-14
CPC Classifications: C10M,C10N,E21B,F16L

Claim:
1. A threaded joint for a steel pipe, the threaded joint comprising: a pin and a box, each of the pin and the box is provided with a contact surface that includes an unthreaded metal contact portion having a seal portion, and a threaded portion; an ultraviolet ray-curable resin coating film positioned on the contact surface of at least one of the pin and the box; an acrylic silicone resin coating film disposed on and substantially coextensive with the ultraviolet ray-curable resin coating film; and wherein a thickness of the acrylic silicone resin coating film is 5 μm to 10 μm (0.0002 to 0.0004 inches).