Full Description ADOPTED_FROM:EN 755-7:2016 This European Standard specifies the tolerances on dimensions and form for aluminium and aluminium alloy extruded seamless tubes with an outside diameter (OD) from 8 mm to 450 mm (round tube, see Figure 1) or with a cross section contained within a circumscribing circle (CD) from 10 mm to 350 mm (other than round tube, see Figure 2), supplied in straight lengths. This European Standard only applies to tube produced by the seamless die/mandrel method of extrusion. This standard applies to extruded seamless tube for general engineering applications only. The temper designations used in this part are according to EN 515. This European Standard does not apply to: - extruded tubes produced by porthole/bridge method (EN 755-8), - tubes delivered in coils (EN 13957), - coiled tubes cut to length (EN 13957).