... Number: Q235,Q345B,45#Type: RoundApplication: Industry,ConstructionShape: Roundlenght: 6-30msurface: polish,brush 1) Name of product: seamless steel tube2 ... and machines 3) Model No.: ASTM A106 grade A/B, API 5L, X52, X42, ST52, K55, STK490, STPG, C20,etc. 4) ... We also produce other specifications according to customers' requirements. 5) Foreign standards implemented: DIN, JIS, ASTM (ASME),etc