Ask:theoretical weight of rectangular steel pipe!
2[(a-d-2r (r d/2)/2 (b-d-2r T (r d/2)/2)x7.85d(kg),a, B are rectangular tube length and width (m),r is the arc radius (m) of the four corners of the tube cavity, and the wall thickness (mm)
Ask:rectangular steel pipe?
1. A round tube is extruded into a square tube. Such a rectangular tube generally has a larger diameter and a thicker wall thickness.
2, is high frequency welding, generally is some small diameter thin wall rectangular tube, this process and high frequency welding pipe forming process principle is the same...
Ask:double-sided submerged arc welded spiral steel pipe and spiral seam submerged arc welded steel pipe?
The welding process is different and the performance is roughly the same. Spiral seam welded steel pipe, now generally submerged arc welding, referred to as SSAw (spiral seam submerged arc welded steel pipe). It is spirally rolled into a steel pipe with a steel coil. It has a spiral weld on the surface, so it is called spiral welded pipe. Double-sided submerged arc welding spiral steel pipe, spiral seam steel pipe welded by double-sided submerged arc welding process...
