welded pipe

Commonly used materials for welded pipe: Q235C Q235B, Q235A, 16Mn, 20#, Q345, etc. Welded pipe due to its different materials and usage, are divided into the following several standard: GB/T3091-2008 (low pressure fluid transport welded steel pipe). Mainly used for conveying water, gas, air, oil and heating hot water or steam and other generally low pressure fluid and other use pipe. Its representative material is: Q235A. GB/T14291-2006 (mineral fluid transport welded steel pipe). Mainly used in mine air pressure, drainage, gas drainage shaft with a straight seam welded steel pipe. Its representative material Q235A and Q234B.