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What is the difference between straight and spiral steel tubes
Jan 29, 2019

What is the difference between straight and spiral steel tubes


There are many differences between straight seam steel pipe and spiral steel pipe due to different production processes. The differences between straight seam steel pipe and spiral steel pipe are discussed in detail below.The production process of straight welded pipe is relatively simple. The main production processes include high-frequency welded straight welded pipe and submerged arc welded straight welded pipe. The straight welded pipe has high production efficiency, low cost and rapid development.The strength of spiral welded pipe is generally higher than that of straight welded pipe, and the main production process is submerged arc welding. Spiral steel pipe can produce welded pipe with different pipe diameters with billet of the same width, and can also produce welded pipe with larger pipe diameters with narrow billet.However, compared with straight seam tubes of the same length, the weld length increases by 30-100%, and the production speed is lower.Therefore, the welding pipe with smaller diameter mostly adopts straight seam welding, while the welding pipe with larger diameter mostly adopts spiral welding.They have been used in the industry production of straight steel tube located at a t-shaped welding technology, the short sections of straight seam steel pipe for docking, the length of the connect accords with the need of engineering, t the probability straight seam welded steel defect is greatly improved, and the t-shaped seam welding residual stress is larger, the stress state of the weld metal are often in a three to increase the possibility of a crack.