Cangzhou Huatao Pipe Industry Co., Ltd. Double sided submerged arc welded steel pipe (JCOE) execution standard: GB/T30063-2013、GB/T3091-2015、GB/T9711-2017（PSL1、PSL2）、API5L(PSL1、PSL2)。 Specification 406mm-1422mm, wall thickness 8mm-70mm. Materials Q235 (B, C, D), Q355 (B, C, D), L245 (N, M) - L555 (N, M), Gr.B-X80 (API5L) can all be manufactured and produced. There are over 1000 different specifications of non model wall thickness steel pipes, with a daily production capacity of 600-800 tons; Short production cycle and fast delivery. Widely used in major projects such as oil, natural gas, steel structures, thermal power generation, ship manufacturing, and foundation pile driving.