National Standard For Wall Thickness Of Spiral Steel Pipe
May 18, 2022
The national standard allowable deviation of the wall thickness of the spiral steel pipe is between 0.2mm-0.6mm. During the forming process, the steel plate is deformed evenly, the residual stress is small, and the surface is not scratched. The machined spiral steel pipe has greater flexibility in the size specification range of diameter and wall thickness. Using the advanced double-sided submerged arc welding process, the welding can be realized in the best position, and it is not easy to have defects such as misalignment, welding deviation and incomplete penetration, and it is easy to control the welding quality.
The outer diameter and wall thickness of threaded steel pipes are basically the same as those of ordinary seamless steel pipes. Because the production of internal threaded steel pipes is relatively difficult, the outer diameter is too large and too small, and the wall thickness is too thin and too thick, which will directly reduce the yield of the steel pipe and increase the production cost.
SBKJ company specializes in manufacturing and selling spiral air duct forming machines, round air duct forming machines, Auto air duct production lines, rectangular air duct forming machines etc. We are one of the leading manufacturers of duct forming machines since 1995.
SBKJ-spiral air duct, square air duct, round air duct machinery manufacturer, with years of technical accumulation, we have provided high-quality products and services for air duct processing enterprises in more than 100 countries, and won wide acclaim in the global market. If you have a need for air duct processing machinery, then we will be the best choice. If you have any needs, welcome to consult us.
