Runzhou pex-b anuv potable pipe is a silane cross-linked plyethylene pipe for hot and cold water system. It can be used for 20 years outdoor and 50 years indoor. Feature:two layers structure: the internal layer is made up of silane cross-linked polyethylene. The external layer is mixed with polyethylene and carbon black, which has anti-ultraviolet ray. Observed standard : gb/t 17219-1998 and gb/t 18992.2-2003. Dn16~dn63