ISO 8066-3:2020
Rubber and plastics hoses and hose assemblies for automotive air conditioning — Specification — Part 3: Refrigerant 1234yf
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.
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Classification
4.1 Types
4.1.1 General
4.1.2 Type A — Rubber, textile-reinforced, rubber-covered
4.1.3 Type B — Rubber, wire-reinforced, rubber-covered
4.1.4 Type C — Barrier, textile-reinforced, rubber-covered
4.1.5 Type D — Thermoplastic, textile-reinforced, thermoplastic-covered
4.1.6 Type E — Veneer, textile-reinforced, rubber-covered
4.1.7 Type F — Veneer, barrier, thermoplastic liner
4.2 Pressure classes
4.3 Moisture-ingression grades
4.4 Refrigerant-permeation grades
5 Dimensions
5.1 Hose inside diameters
5.2 Hose wall thickness variation
6 Testing and performance requirements
6.1 Test conditions
6.2 Leakage
6.2.1 Method A for type test and production test
6.2.2 Procedure for method A
6.2.3 Method B for routine test
6.2.4 Procedure for method B
6.3 Refrigerant permeation
6.3.1 Requirement
6.3.2 Procedure
6.4 Ageing
6.4.1 Requirement
6.4.2 Procedure
6.5 Low-temperature test
6.6 Vacuum resistance
6.6.1 General
6.6.2 Requirement
6.6.3 Procedure
6.7 Length change under pressure
6.7.1 Requirement
6.7.2 Procedure
6.8 Minimum bursting pressure
6.9 Proof pressure
6.9.1 Requirement
6.9.2 Procedure
6.10 Extraction by R1234yf
6.11 Ozone resistance
6.12 Hose cleanliness
6.12.1 Requirement
6.12.2 Procedure
6.13 Impulse test
6.13.1 Requirement
6.13.2 Procedure
6.14 Moisture ingression
6.15 Coupling integrity (sealability)
7 Frequency of testing
8 Marking
9 Test report
10 Recommendations for packaging and storage
Annex A (Normative) Determination of refrigerant permeation
Annex B (normative) Low-temperature test
Annex C (normative) Determination of amount of matter extracted from hoses by liquid R1234yf
Annex D (normative) Impulse test
Annex E (normative) Moisture ingression test
Annex F (normative) Coupling integrity (sealability)
Annex G (normative) Test frequency
Annex H (informative) Production tests
Bibliography
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Classification
4.1 Types
4.1.1 General
4.1.2 Type A — Rubber, textile-reinforced, rubber-covered
4.1.3 Type B — Rubber, wire-reinforced, rubber-covered
4.1.4 Type C — Barrier, textile-reinforced, rubber-covered
4.1.5 Type D — Thermoplastic, textile-reinforced, thermoplastic-covered
4.1.6 Type E — Veneer, textile-reinforced, rubber-covered
4.1.7 Type F — Veneer, barrier, thermoplastic liner
4.2 Pressure classes
4.3 Moisture-ingression grades
4.4 Refrigerant-permeation grades
5 Dimensions
5.1 Hose inside diameters
5.2 Hose wall thickness variation
6 Testing and performance requirements
6.1 Test conditions
6.2 Leakage
6.2.1 Method A for type test and production test
6.2.2 Procedure for method A
6.2.3 Method B for routine test
6.2.4 Procedure for method B
6.3 Refrigerant permeation
6.3.1 Requirement
6.3.2 Procedure
6.4 Ageing
6.4.1 Requirement
6.4.2 Procedure
6.5 Low-temperature test
6.6 Vacuum resistance
6.6.1 General
6.6.2 Requirement
6.6.3 Procedure
6.7 Length change under pressure
6.7.1 Requirement
6.7.2 Procedure
6.8 Minimum bursting pressure
6.9 Proof pressure
6.9.1 Requirement
6.9.2 Procedure
6.10 Extraction by R1234yf
6.11 Ozone resistance
6.12 Hose cleanliness
6.12.1 Requirement
6.12.2 Procedure
6.13 Impulse test
6.13.1 Requirement
6.13.2 Procedure
6.14 Moisture ingression
6.15 Coupling integrity (sealability)
7 Frequency of testing
8 Marking
9 Test report
10 Recommendations for packaging and storage
Annex A (Normative) Determination of refrigerant permeation
Annex B (normative) Low-temperature test
Annex C (normative) Determination of amount of matter extracted from hoses by liquid R1234yf
Annex D (normative) Impulse test
Annex E (normative) Moisture ingression test
Annex F (normative) Coupling integrity (sealability)
Annex G (normative) Test frequency
Annex H (informative) Production tests
Bibliography