Dry!Do you know the cold knowledge about stainless steel welded pipe?April 15, 2021
Submerged arc welding steel pipe standard and its classificationMay 6, 2021
Straight seam submerged arc welded pipe is a kind of JCOE steel pipe forming material.
Using JCOE steel pipe forming, one weld, submerged arc welding process, specifications from 325mm to 1420mm.When the diameter of straight submerged arc welding pipe is greater than 914.4, the standard allows two straight welds.Straight-seam submerged arc welded pipe products in accordance with GB/T3091-2008 low pressure fluid steel pipe standards, GB/T9711.1 (2) -1997 oil gas pipeline standards, ASTM A252 welded structure steel pipe in the United States standards.The production process of straight seam submerged arc welded pipe is flexible and can produce any specification and wall thickness within the range, and the production efficiency is lower than that of high frequency straight seam welded pipe and spiral welded pipe.The biggest advantage of straight seam submerged arc welding pipe is that it can produce high frequency steel pipe, spiral steel pipe, and even seamless steel pipe.The production cost of straight seam submerged arc welding pipe is higher than that of high frequency steel pipe and spiral steel pipe, but the price of straight seam submerged arc welding pipe is more favorable than that of seamless steel pipe.Directly seamed submerged arc welding pipe can produce high-frequency steel pipe and materials that spiral steel pipe can not produce. For example, high-frequency steel pipe is usually produced in common domestic specifications and mass production inventory, usually made of Q235B and Q345B, and other high-frequency equipment and spiral equipment made of hard steel plate can not be produced in China.