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Structure
1.Coupling connection type, theconnectiong strength is no less than that of pipe body
2.Thread is improved buttress with high connection efficiency,which is easy to process
3.Main seal adopts taper to taper seal structure with excellent seal ability
4.The internal wall of pipe body flushes with that of coupling
5.The connection designed with two steps torque shoulders has excellent compression resistance and over-torque resistance
Performance
1.Excellent gas seal performance:Unique metal to metal radial seal is reliable at high pressure and combined load;
2.High connection strength: Same as API Buttress;
3.Superior over-torque resistance: Running torque is 3 times of the common makeup torque because of the two shoulder design;
4.Excellent compression resistance: The LU-2J connection provides the compression resistance no less than that of pipe body and beyond its elongation
LU-2J special thread