Seamless Steel Tube with Uneven Thick Wall
1. The elongation coefficient of seamless steel tube is too large, the rolling speed is too high, and the rolling is stable.


2. The instability of the capillary of the throwing punch steel can easily lead to the uneven thickness of the tail.


3. It is easy to cause uneven thickness of the head pipe due to the large bending of the seamless steel pipe tip cutting slope and the error of the center hole of the pipe.


Non-uniform Cause Action of Thick-walled Seamless Steel Pipe
1. Attention should be paid to using the state guide disc and increasing the check strength of the guide disc bolts to reduce the operating range of the lead plate in rolling seamless steel tube and ensure the stability of the cast steel.


2. Check the quality of seamless steel pipe to prevent the cutting slope of the pipe tip from being greatly reduced. When replacing or repairing the seamless steel pipe, the centering hole should be adopted to correct it.