Irregular wall thickness

• Excessive wall thickness deviation in steel pipes has led to assembly difficulties or localized stress concentration.

• ReasonUnstable rolling force control and uneven roller wear.

  Outer diameter ellipticity exceeds tolerance

• The elliptical outer diameter of the steel pipe affects its sealing performance or assembly accuracy.

• ReasonProcess failure in straightening and improper adjustment of sizing machine.

  Straightness Deviation

• Bent steel pipes, rendering them unsuitable for straight installation or affecting transmission accuracy.

• ReasonCold working stress relief, heat treatment deformation.