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Spiral pipe longitudinal welded pipe

API 5L Grb seamless steel pipe
PIC-(Spiral pipe longitudinal welded pipe)
  Spiral pipe longitudinal welded pipe characteristics: simple production process, high production efficiency, low cost, rapid development. Spiral welded pipe ERW pipe strength than high, with a narrow billet production of large diameter pipe, you can also use the same width of the billet production of different pipe diameters. But with the same length of straight pipe,weld length increases by 30~100%, and the production rate is low.