The first may be due to the stress of the spiral seam submerged arc welded steel pipe. That is, the residual stress and welding stress after the steel pipe is formed. Secondly due to the presence of hydrogen. If the flux is not dried enough, the preheating temperature is not sufficient or the prehea

Before the steel is hot rolled, heating the raw material not only improves the mental plasticity, reduces the deformation force, but also facilitates rolling. In addition, during the heating process of the steel, some structural defects and stresses caused by the ingot can also be eliminated for the

Many customers often ask us when purchasing steel pipes, what is the difference between the same hot-rolled steel pipe and cold-rolled steel pipe? Why are there two different types of steel pipes under the same material?1. The cold-rolled steel pipe allows local buckling of the section, so that the

Product name: Oil tubingMaterial: carbon steelStandard: API 5CT Size: 2-7/8''X2.441Quantity: 5000 tonsMany cooperations have given the customer full confidence in THREEWAY STEEL.