The unique combination of a metal-to-metal seal and a special relief groove in coupling provides pressure integrity for both internal and external pressure in moderate to heavy wall tubular applications.
The hooked thread form provides excellent resistance against tensile loads, bending moments and external pressures under a variety of load combinations. The thread geometry provides for easy stabbing, quick, trouble-free run.
Torque shoulder stop improves compressive, torsional and leak resistance. The inside diameter of pin is profiled to match the J area of the coupling. This provides a smooth bore through the connection.
Higher connecting strength: thread is hook type to resist jump-out, it is designed for 100% efficiency under tension.
Excellent seal ability:the multiple seal arrangement, The unique combination of a metal-to-metal seal and a close-tolerance thread-seal ensures gas-tight sealing integrity to 100% of the rated burst and collapse of the pipe body.
High bending resistance: Thread is hook type, along with the reverse torque shoulder. This design exhibits a high bending, compression resistance for connections of this class.
Inner flat design reduces the air and liquid turbulence in the pipe, so make the energy loss lower.