... )Thickness:5-20mm 3)Standard:API 5L,ASTM,GB/T9711.1-1997 4)Grade:Q235B,Q345B... SSAW Steel Pipe:1)Norminal OD:219 ... .1-3048mm2)Thickness:5-20mm3)Standard: API 5L, ASTM, GB/T9711.1-1997 ... ,Q234,Q345,A106, A,B,X42,X46,X52,X56,X60,X65,X70,X80Outer Diameter219.1mm-3000mm Thickness5mm-30mm Length6-20m, as ...