1)standard :GB,ASTM ,DIN , 2)grade:10#,20#,45#, ... :ST37/2,Q195,Q215,20#,Q345 etrc.STANDARD:ASTM A53GrA,GrB,BS1987-1985,GB3091-2001.Application:Irrigation ... Tube Co.,Ltd.Address: No.14,District2,Dadong Steel Pipe Market, Development Zone,liaocheng, shandong, china Tel: ... Hotmail id: lctrgg_exportingWelcome you inquire in steel pipe and discuss with you together!! ERW A333 SCH60 seamless carbon steel ...