1. The cold rolling step:The surface state of the strip there are two main aspects of surface roughness and residues.2. Surface roughness:Cold-rolled strip surface roughness control process involving many factors, by batch annealing the strip, have a certain surface roughness to reduce the effect bo

We see more hot dip galvanized steel craft on the market now, hot dip galvanized steel surfaces because of improper operation of the formation of surface defects, the need for strict process to produce better products.If the defect is due to the hot-dip galvanizing equipment dysfunctional or poor co

Boiler tubes cooled in the heating surface tubes running time count or deterioration of the operating environment, dry, in a short time so that a sudden increase in the temperature of the steel pipe, the temperature reaches above the rated temperature, a tensile strength of steel sharp decline in st

Straight seam steel pipe production, the wrong side have occurred, many influencing factors. In practice, often by a dry wrong side super differential leaving the steel pipe downgrade. Cause analysis thus produces the wrong side of straight pipe joints and prevention measures are necessary.1, Strip