Welded steel pipe, also called welded pipe, is a steel pipe made by welding steel plates or steel strips after being crimped. The production process of welded steel pipe is simple, the production efficiency is high, there are many varieties and specifications, and the equipment cost is small.
Since the 1930s, with the rapid development of continuous production of high-quality strip steel and the improvement of welding and inspection technology; the quality of welds has continuously improved, and the variety of welded steel pipes has increased, and has replaced Seam steel pipe. Welded steel pipe is divided into straight seam welded pipe and spiral welded pipe according to the form of weld.
The production process of straight seam welded pipe is simple, the production efficiency is high, the cost is low, and the development is fast. The strength of spiral welded pipes is generally higher than that of straight seam welded pipes. Welded pipes with larger diameters can be produced from narrower billets. Welded pipes with different diameters can also be produced with billets of the same width. However, compared with straight seam pipes of the same length, the weld seam length is increased by 30 to 100%, and the production speed is lower. Therefore, the smaller-diameter welded pipes are mostly straight seam welded, and the large-diameter welded pipes are mostly spiral welded.
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Post time: Jan-09-2020