... W.T :3-40mm Brand:Tigersteel API 5L ASTM A 53/A106 Gr.B seamless steel tube,line pipe & oil ... DIN2440,GB/T3091-2008,EN39,BS1139Material Carbon steel :ASTM A 53/A106 GR,B ,X42.X52. Q195,Q235,Q345...... ... 6.0m,11.5m,11.8m,12mZinc Coating 60-275g/m2 (If need )Productivity 30,000 per monthMOQ 10 ... etc.Contact Person Amanda Cui 15563512134 API 5L ASTM A 53/A106 Gr.B seamless steel tube,line pipe & oil ...