Equipment Introduction: The large-caliber straight seam double-sided submerged arc welding steel pipes adopt the most advanced hydraulic bending process in China. The bending machine is of double linked structure, which could process the max. length of 16m with the max. pressure of 1600tons. The single machine could be up to 400tons. So, the bending machine could be able to process the ordinary and the special steel pipes with the diameter of 325-2150mm and wall thickness of 6-30mm. The products could be up to the standard requirements of USA Petroleum Association through many processes including bending, seam butting, internal welding, external welding, straightening, and head flattening etc. So, the products are the optimal choice for the large pipe engineering, water or gas transportation project, urban pipe network construction. Till now, the State Project of Western Gas Eastern Transportation has used 20 tons of pipes of the kind, most of which is imported.  
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