There is provided a threaded connection for pipe the tightening torque of which is easy to adjust. A threaded connection for pipe according to the present embodiment includes a pin (3) and a box (4). The pin (3) and the box (4) have contact surfaces (34) and (44) that include thread parts (31) and (41), metal seal parts (32) and (42), and shoulder parts (33) and (43), respectively. The threaded connection for pipe includes a Zn-Ni alloy plating layer (100) on the contact surface (34) or (44) of one of the pin (3) and the box (4), and includes a Cu-Sn-Zn alloy plating layer (110) on the contact surface (34) or (44) of the other one. The threaded connection for pipe further includes a lubricating coating (200) in a liquid state or a semisolid state on at least one of the Zn-Ni alloy plating layer (100) and the Cu-Sn-Zn alloy plating layer (110).
展开▼