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 restrict losses of refrigerant and contamination of the system. The operational temperature range is -40 °C to +125 °C.Due to the critical relationship between the hose and coupling for this application, a requirement that the coupling to be used in service be used for testing has been laid down.The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 1402, Rubber and plastics hoses and hose assemblies一Hydrostatic testing ISO 4671:200Z Rubber and plastics hoses and hose assemblies 一Methods of measurement of the dimensions of hoses and the lengths of hose assemblies ISO 7326:2016, Rubber and plastics hoses – – Assessment of ozone resistance under static conditions ISO 8330, Rubber and plastics hoses and hose assemblies一Vocabulary ISO 23529, Rubber 一General procedures for preparing and conditioning test pieces for physical test methods ISO/TR 11340, Rubber and rubber products – – Hydraulic hose assemblies – – External leakage classification for hydraulic systems.Wind a hose or hose assembly, of length between 300 mm and 1 000 mm, on to a mandrel having a diameter eight times the outside diameter of the hose. Place the mandrel and hose or hose assembly in a circulating-air oven for 168 hat 125 °C+2 °C.Take the mandrel and hose or hose assembly out of the oven, allow to cool to ambient temperature,unwind the hose or hose assembly and examine it externally for any cracks, disintegration or other defects. Then test the hose or hose assembly in accordance with the procedure given in 6.2.3 and 6.2.4.BS ISO 8066-3 pdf download.