Cangzhou Longma Steel Pipe Manufacturing Co.,Ltdcan produce Double-side longitudinal submerged arc welded steel pipes whose parameters are as follows: diameter: ?351mm&＃8212;1420mm, wall-thickness: 8mm&＃8212;50mm, length: 3m&＃8212;14m, material: 20#?16Mn?Q235B, alloy steel, stainless steel. Spiral steel pipes as follows: diameter: ?219&＃8212;?2020, wall-thickness: 6mm&＃8212;14mm, material: 20#, 16Mn, Q235B, our products are according to GB/19001&＃8212;2000&＃8212;&＃8212;ISO9001&＃8212;2000 standard and meet the requirments of  GB/T8163&＃8212;1999 standard and API standard.
Seamless steel pipe  are our latest products which are produced from straight seam steel pipes  by pyrocondensation and accurately  machined then through X-ray inspection and get rid of the seam.  Seamless steel pipes are widely used for water treatment in power plant, flammble liquid transfer piping for central air conditioner and petroleum industry. Also had been exported to Russia, India and South Korea,ect. Our seamless steel pipes have been used in the rebuilding of TianJin Station and largest water treatment pipes in Asia.