Tangshan square tube manufacturer introduces to you: Why is there residual prestress on square tube?
2022-03-15
At present, zinc square tubes are widely used. Due to the galvanized surface, the anti-corrosion performance can reach a good standard, and the anti-corrosion effect can play a good role. Why is there residual prestress on the rectangular pipe? The square tube surface is galvanized, which has good weather resistance and corrosion resistance. It not only has high use strength, but also avoids aging. After galvanizing, it can be used normally in various environments, which can not only expand the scope of use, but also
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