API 5L ERW Welding Pipe OD 21.3mm-----630mm WT ... Material Q235(B),Q345(B),#ETC Standard BS1387,EN10255,EN102 API 5L ERW Welding Pipe Scaffold TubeItemDetailsOuter Diameter21.3mm-----630mmWall Thickness1 ... requirementTest EquipmentRaw Material TestTensile Test ,Yeild Strength,Elogation,Impact Test, Chemical Analysis,Hardness Test,Charpy Impact Test,Metallographic ExaminationFinal Product TestHydraulic ...