1)Seamless steel tube per ASTM A106B/API-5L GR.B/A53 2)Size: 1/4"-28"*SCH20\30\STD\60\ ... : Henan China (Mainland)Brand Name: AngangModel Number: Q235,Q345B,45#Type: RoundApplication: Industry,ConstructionShape: Roundlenght: 6-30msurface: polish,brush 1) Name ... tube2) Application: pipes for usual structure and machines 3) Model No.: ASTM A106 grade A/B, API 5L, X52, X42, ST52, K55, STK490 ...