... ,ASTM,GB,DIN,API Galvanized steel tube for hot dip,pre and electric Products Details :1) Round steel pipe: Size from 12mm ... -1985, ASTM A53B Sch10-40,ASTM A500, API5L.API5CT, DIN2440 and EN10219Material:Q195,Q235,Q345,SS400,S235JR,X42,X46,X52,X60 ...