Welded steel pipe is bent with steel or steel plate is round, square and other shapes and then welded into the surface of the seam with the steel pipe. The blank used in the welded steel pipe is steel or strip.
Since the 1930s, with the rapid development of high-quality strip rolling and the improvement of welding and inspection technology, the quality of welds has been increasing continuously, and the specifications of welded steel pipes have been increasing and more and more fields have been replaced. Sewing steel pipe. Welded steel pipe is less costly than seamless steel pipe and has high production efficiency.Welded Steel Pipe
In the environment of containing sulfuric acid or hydrochloric acid, the higher the Ni content in the T-shaped welded steel pipe, the stronger the corrosion resistance is. In the general environment, only in the T-welding steel pipe to add Cr can prevent the phenomenon of erosion. Poor edge of the strip is another important cause of the wrong side. The influence of mass flow rate, heat flux and structural parameter (ratio of spiral curvature diameter and ratio of polygon welded pipe diameter Dc / D) on saturated bubble boiling heat transfer coefficient in vertical spiral tube.
T-shaped welded steel pipe in the production, the wrong side occurs, the impact of many factors. In the production practice, often by the dry edge of the steel pipe degradation. Therefore, it is necessary to analyze the causes of the wrong side of spiral steel pipe and its preventive measures.Welded Steel Pipe
As the shape and size of the head and tail of the non-cutting edge is poor, it is easy to cause the wrong bending of the steel belt when bending. Three vertical T-shaped welded steel pipe: pipe diameter D = 10mm, T-shaped welded steel pipe curvature diameter and spiral diameter ratio changes were Dc, the diameter of the pipe diameter D = 10mm, / D = 15,20,25, helix pitch Pt = 20mm, tube length L = 503mm, L = 660mm, L = 817MM. Mass flow G = 200 ~ 400Kg / (m'2 · s), heat flux q = 5 ~ 15KW / m'2, saturation pressure p, saturation = 0.414880MPa, saturation temperature T, saturation = 283.15K.Welded Steel Pipe