GB/T 26027-2010

This standard specifies the requirements, test methods, inspection rules, and marking, packaging, transportation, storage, as well as the contents of quality certificates and contracts (or purchase orders) for large-sized seamless drawn tubes made of aluminum and aluminum alloys (hereinafter referred to as "tubes"). This standard applies to circular-section tubes with an outer diameter of 120 mm to 220 mm (as shown in Figure 1), as well as square-section tubes with side lengths of 70 mm × 50 mm to 120 mm × 120 mm (as shown in Figure 2) or rectangular-section tubes (as shown in Figure 3) (hereinafter referred to as "rectangular tubes"). This standard only applies to tubes produced by the extrusion-billeting method, and is not applicable to welded tubes or tubes used in the electrical industry.