We are a great manufacturing corporation in China, specializing in Seamless steel pipe, straight seam steel pipe and glavanized steel pipe. Product implementation of standards and materials: ASTM A106B, ASTM A53 B, API 5L GR B, JIS G3454 STPG370, JIS G3452 SGP, JIS G3444, DIN1629, BS1387, STK400, etc