This document specifies the classification, technical requirements, test methods, inspection rules, marking, Encasement, transportation, storage and mass certificate and the content of the order form (or contract) of aluminum and aluminum alloy hot extruded seamless round tubes. It is applicable to the production and inspection of aluminum and aluminum alloy hot extruded seamless round tubes (hereinafter referred to as "pipes") for general industrial use. In the normative reference document, it covers a number of standards related to aluminum and aluminum alloy, such as chemical composition, tissue inspection, Dimension and allowable deviation, conductivity test, identification and other aspects of the standard. Terms and definitions, the terms and definitions applicable to this document are determined by GB/T 8005.1 and GB/T 26492.5. The document also specifies the classification of pipes, including grades, supply status and size specifications, to ensure that the pipes meet the corresponding technical standards in production and use. This specification is detailed and comprehensive, providing specific technical guidance for the manufacture, inspection and use of aluminum and aluminum alloy hot extrusion seamless tubes.