... , S355JR;ASTMA333;ST37,ST42,ST52;Gr.B,X42,X46,X52,X56,X60,X65,X70, etcUsagefor petroleum/ natural gas pipeline , for conveying water,drainage,coal gas, mineral ... 03082.00056570.000483Third, the process of hot-rolled seamless steel pipe Picture1 our work plant.Second why should you choose ... and serve a long Any questons are welcomed!Tianjin WANLEI STEEL PIPE CO., LTDTel: (0086)022-25343802 Fax: (0086) ...