ISO 8066-3:2020

INTERNATIONAL ISO
STANDARD 8066-3
First edition
2020-08
Rubber and plastics hoses and
hose assemblies for automotive air
conditioning — Specification —
Part 3:
Refrigerant 1234yf
Tuyaux et flexibles en caoutchouc et en plastique pour climatisation
des automobiles — Spécifications —
Partie 3: Réfrigérant 1234yf
Reference number
©
ISO 2020
© ISO 2020
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Published in Switzerland
ii © ISO 2020 – All rights reserved

Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3  Terms and definitions . 1
4  Classification . 2
4.1 Types. 2
4.1.1 General. 2
4.1.2 Type A — Rubber, textile-reinforced, rubber-covered . 2
4.1.3 Type B — Rubber, wire-reinforced, rubber-covered . 2
4.1.4 Type C — Barrier, textile-reinforced, rubber-covered . 2
4.1.5 Type D — Thermoplastic, textile-reinforced, thermoplastic-covered . 2
4.1.6 Type E — Veneer, textile-reinforced, rubber-covered . 2
4.1.7 Type F — Veneer, barrier, thermoplastic liner . 2
4.2 Pressure classes . 3
4.3 Moisture-ingression grades . 4
4.4 Refrigerant-permeation grades . 4
5 Dimensions . 4
5.1 Hose inside diameters . 4
5.2 Hose wall thickness variation . 4
6 Testing and performance requirements . 5
6.1 Test conditions . 5
6.2 Leakage . 5
6.2.1 Method A for type test and production test . 5
6.2.2 Procedure for method A . 5
6.2.3 Method B for routine test . 5
6.2.4 Procedure for method B . 5
6.3 Refrigerant permeation . 5
6.3.1 Requirement . 5
6.3.2 Procedure . 6
6.4 Ageing . 6
6.4.1 Requirement . 6
6.4.2 Procedure . 6
6.5 Low-temperature test . 6
6.6 Vacuum resistance . 6
6.6.1 General. 6
6.6.2 Requirement . 6
6.6.3 Procedure . 6
6.7 Length change under pressure . 7
6.7.1 Requirement . 7
6.7.2 Procedure . 7
6.8 Minimum bursting pressure. 7
6.9 Proof pressure . 7
6.9.1 Requirement . 7
6.9.2 Procedure . 7
6.10 Extraction by R1234yf . 8
6.11 Ozone resistance. 8
6.12 Hose cleanliness . 8
6.12.1 Requirement . 8
6.12.2 Procedure . 8
6.13 Impulse test . 8
6.13.1 Requirement . 8
6.13.2 Procedure . 8
6.14 Moisture ingression . 9
6.15 Coupling integrity (sealability) . 9
7 Frequency of testing . 9
8 Marking . 9
9 Test report .10
10 Recommendations for packaging and storage .10
Annex A (Normative) Determination of refrigerant permeation .11
Annex B (normative) Low-temperature test .14
Annex C (normative) Determination of amount of matter extracted from hoses by liquid
R1234yf .15
Annex D (normative) Impulse test .16
Annex E (normative) Moisture ingression test .20
Annex F (normative) Coupling integrity (sealability) .24
Annex G (normative) Test frequency.26
Annex H (informative) Production tests .27
Bibliography .28
iv © ISO 2020 – All rights reserved

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures
...