Comparison for spiral pipes and seamless pipe

Seamless tubeis a kind of hollow section, and the peripheral no joint of strip steel. Seamless steel pipeis no seam, hot or cold drawing process molding.

Characteristic is confined good.

螺旋管特征：straight seam welding tube production process is simple, high production efficiency, low cost. the strength of the spiral welded pipe is usually better than straight seam welding pipe is high, which can use a narrow billet production of larger diameter welded pipe, still can use the same width of the billet production pipe diameter different welded pipe.

But with the same length straight seam pipe, compared to weld length increases 30 ~ 100%, and the production speed is low. Therefore, a small-bore tube welding mostly adopts the straight seam welding, large diameter welded pipe is mostly using spiral welded.

Spiral steel pipe型通过条带，无缝钢管型由圆钢制成，差异非常大，生产过程不同：
螺旋管是使用带钢焊接，可以看到焊接;

无缝管采用圆钢冲孔，螺旋管壁厚差异在非常大的，无缝管小管基本没有差异，贝加松的差异也不会很多。