In the case of Q235B steel pipe without internal welding ribs, it is easy to cause the problem of not tightly bonding the wear plate and Q235B steel pipe. If the pores are too large, the Q235B steel pipe will shrink.
1) Thermal expansion and contraction
The shrinkage of the Q235B steel pipe is greater than that of the Q235B steel pipe, so the end face of the wear-resistant plate of the lining wear-resistant plate will shrink inward.
Unlike metals, the crystallinity of crystalline resin is less than 100%.
3) Cross-linking degree of Q235B steel pipe lining
After Q235B steel pipe is placed for a period of time, as the degree of cross-linking increases, shrinkage of the lining wear-resistant plate is easy to occur.
4) Whether there are fillers or reinforcements in the raw materials
In addition to reducing costs, the filler of Q235B steel pipe can also improve the rigidity and heat resistance, dimensional stability, shrinkage and creep resistance of the product.