BS ISO 8066-3:2020 pdf free.Rubber and plastics hoses and hose assemblies for automotive air conditioning - Specification. BS ISO 8066-3 This document specifies the requirements for rubber or thermoplastic hoses and hose assemblies used for circulating liquid and gaseous R1234yf (tetrafluoropropene) in the air-conditioning systems of automobiles. The hoses and hose assemblies are designed in such a way as to...