Influencing Factors of the Inner Hole Finish of Cold Drawn Seamless Steel Pipe
How much smoothness of the inner hole of the cold drawn seamless steel pipe can be achieved? This is mainly based on the customer's product requirements. In the field of hydraulic steel pipes, the inn...
Welding Distortion Correction Method
Generally, the deformation of welded parts does not need to be corrected. Only when the post-weld deformation exceeds the technical requirements, it needs to be corrected. The welding deformation is m...
Weld Treatment of High Frequency Straight Seam Steel Pipe
High-frequency straight seam steel pipe (ERW welded pipe) is based on the principle of electromagnetic induction and the skin effect, proximity effect and eddy current heating effect of electric charg...
Significance of Proximity Effect to the Production of High-frequency Welded Pipes
In addition to the skin effect, the proximity effect is another feature of current. When alternating currents of equal magnitude and opposite directions pass through two adjacent conductors, the curre...
How to Avoid the Quality Defects of Welded Pipe in Sizing Section?
Dimensional tolerance defects, surface defects and straightness defects are common defects of welded pipes in the sizing section.
1. Dimensional tolerance defects
The adjustment difficulty of the ...
The Background and Classification of Upset Tubing
Upset tubing, as the name suggests, is to thicken the tubing to make the tubing more robust and durable. The thickness of a standard pipe is not increased randomly. Increasing randomly may cause crack...
