scope:

Specifies the tolerances on dimensions and form for aluminium and aluminium alloy, extrudes, seamless tubes with an outside diameter (OD) from 8 mm to 450 mm (round tube) or with a cross section contained within a circumscribing circle (CD) from 10 mm to 350 mm (other than round tube) supplied in straight lengths. This standard only applies to tobe produced by the seamless die/mandel method of extrusion. This standard applies to extruded seamless tube for general engineering applications only. This standard does not apply to extruded tube products by tube porthole/bridge method or coiled tube.