... pipe include carbon steel seamless pipe, seamless roll steel pipe, Double-side buried arc spiral welded pipes, ERW pipe, SSAW pipe ... 1999, ASTM A53, ASTM A106, DIN1629material:10#, 20#, 16MN, Q2952.Double-side Buried Arc Spiral Welded PipesOD:219mm-1820mmTHK:5.0mm ... to receiving your enquires soon.About Us:Hebei Longrun Pipeline Group Co., Ltd. is located in Longtan Industrial Park of Yanshan County, ...