T/ZZB 2125-2021 Aluminum Pipes for HVAC Ducts with Welded Aluminum-plastic Composite Pressure Tubes
T/ZZB 2125-2021 Aluminum Pipes for HVAC Ducts with Welded Aluminum-plastic Composite Pressure Tubes
Basic Information
Scope
Main technical content: This document specifies the terms, definitions, and symbols, classification, usage conditions, and marking, basic requirements, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, and installation of aluminum-plastic composite pressure pipes (hereinafter referred to as "aluminum-plastic pipes") made of butt-welded aluminum pipes as embedded metal layers reinforced by hot melt adhesives and composite with inner and outer layers of polyethylene plastic. This document is applicable to aluminum-plastic pipes used in HVAC systems to transport cold and hot water under design pressure, but it is not applicable to plastic-clad aluminum pipes that have not been welded or composite with adhesive layers.