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. Therefore, a smaller caliber were powered by straight seam welded pipe, large diameter spiral welded pipe is mostly used

　　Spiral tube and its standard classification: pressurized fluid delivery with spiral submerged arc welded steel pipe (SY5036-83 ) is mainly used for the transportation of petroleum, natural gas pipeline; pressure fluid delivery with spiral high frequency welded pipe ( SY5038-83 ), high frequency welding method welding, pressure fluid delivery for spiral high frequency welded pipe. Steel pipe bearing capacity, good plasticity, easy welding and molding; low pressure fluid delivery with spiral submerged arc welded steel pipe ( SY5037-83 ), using automatic submerged arc welding or welding methodused for water, gas, air and steam low pressure fluid delivery with submerged arc welded steel pipe