ã€China Aluminum Network】 1. The commonly used aluminum and aluminum alloy tube aluminum tube of the higher temperature should not exceed 200 °C; for the pressure of the pipeline, the use of temperature should not exceed 160 °C. Aluminum and aluminum alloy pipes are widely used in cryogenic cryogenic projects. 2. Aluminum and aluminum alloy pipe installation (1) Aluminum and aluminum alloy pipe transport and storage should be avoided to avoid collision, extrusion, scrape pipe, stored with iron, stainless steel, copper and other metal isolation, so as to avoid electrochemical corrosion. (2) Aluminium and aluminum alloy pipes can be cut by hand saws, machines (saws, lathes, etc.) and grinders, and flame cutting is not allowed; bevels should be machined and no flames such as oxygen-acetylene can be used. (3) Aluminum and aluminum alloy pipe connections are generally welded and flanged. Welding can be manual tungsten arc welding, oxygen - acetylene welding and melting semi-automatic argon arc welding. (4) When piping insulation, do not use asbestos rope, asbestos plate, glass wool and other alkaline materials, and use neutral insulation materials.