Threading connector for pipes

The utility model discloses a threading connector for pipes, comprising an internal threaded part (1) and an external threaded part (2), wherein the inner wall of the internal threaded part (1) is provided with an internal cylindrical sealing face (121), an internal conical sealing face (122) and a 25-degree back internal conical sealing face (123); the periphery of the external threaded part (2) is provided with an external projected cambered sealing face (221), an external conical sealing face (222) and a 25-degree beveling shoulder external conical face (223); the external projected cambered sealing face (221) is in interference fit with the internal cylindrical sealing face (121); the 25-degree beveling shoulder external conical face (223) is in sealing fit with the 25-degree back internal conical sealing face (123); and the external conical sealing face (222) is in sealing fit with the internal conical sealing face (122). Under the action of higher stretching force, extrusion force and larger torque, the threaded connector for pipes still has good sealing effect and avoids thread gluing, thereby being applicable to oil casing pipes.