... water system. PEX-b anUV potable pipe is a silane cross-linked plyethylene pipe for hot and cold water ... layers structure: The internal layer is made up of silane cross-linked polyethylene. The external layer is mixed with ... cut smoothly, vertical with spool thread.PassedQualified2Crosslinking degree, %≥65(silane crosslinked HDPE)71.4Qualified3Longitudinal reversion, %≤31.1Qualified4Hydraulic Test1)20, ...