2008NF A50-630-7:2008 Aluminium and aluminium alloys - Extruded rod/bar, tube and profiles - Part 7 : seamless tubes, tolerances on dimensions and form.
1999NF A50-636:1999 Aluminium and aluminium alloys. Extruded rod/bar, tube and profiles. Part 7 : seamless tubes, tolerances on dimensions and form.
1970NF A50-737:1970 ALUMINIUM AND ALUMINIUM ALLOYS. DRAWN ROUND TUBES IN STRAIGHT LENGTHS OR COIL. TOLERANCES AND DIMENSIONS.