ISO 6804:2023

INTERNATIONAL ISO
STANDARD 6804
Fifth edition
2023-05
Rubber and plastics inlet hoses
and hose assemblies for washing-
machines and dishwashers —
Specification
Tuyaux et flexibles en caoutchouc et en plastique pour l'alimentation
des machines à laver et lave-vaisselle — Spécifications
Reference number
© ISO 2023
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Published in Switzerland
ii
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Classification . 2
5 Couplings and fittings.2
6 Materials and construction . 2
7 Dimensions and tolerances .2
7.1 Inside diameters, tolerances and minimum wall thickness . 2
7.1.1 Type 1 and type 2 hoses . 2
7.1.2 Type 3 hoses . 2
7.2 Concentricity . 3
7.3 Tolerances on length. 3
8 Performance requirements for finished hoses and hose assemblies .3
8.1 Hydrostatic-pressure requirements — Proof pressure test . 3
8.2 Burst test . 3
8.3 Bending test . 3
8.4 Flexing tests . 3
8.4.1 General . 3
8.4.2 Sub-ambient temperature flexing test . 4
8.4.3 Standard laboratory temperature flexing test . 4
8.5 Resistance to kinking . 4
8.6 Resistance to hydrostatic pressure after ageing . 5
8.7 Resistance to ozone or weathering . 6
8.7.1 Resistance to ozone — Type 1 and type 2 hoses . 6
8.7.2 Resistance to weathering — Type 3 hoses . 6
8.8 Resistance to hydraulic-pressure impulse test . 6
8.9 Adhesion . 7
8.10 Mechanical resistance of thermoplastics coupling nuts . 7
9 Frequency of testing . .8
10 Test certificate . 9
11 Marking . . 9
12 Recommendations for packaging and storage . 9
Annex A (normative) Type tests and routine tests .10
Annex B (informative) Recommended tests for production acceptance testing .11
Annex C (informative) Delivery certificate and test certificate .12
Bibliography .13
iii
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
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ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO document should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
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www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 45, Rubber and rubber products,
Subcommittee SC 1, Rubber and plastics hoses and hose assemblies.
This fifth edition cancels and replaces the fourth edition (ISO 6804:2016), which has been technically
revised:
The main changes are as follows:
— the dates of some references have been updated (i.e. ISO 7326:2016, ISO 10619-1:2017);
— subclause 8.6 has been updated and corrected from 3,15 MPa (31,5 bar) to 2,1 MPa (21 bar);
— the mention of the publication year has been removed from Clause 11.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
INTERNATIONAL STANDARD ISO 6804:2023(E)
Rubber and plastics inlet hoses and hose assemblies for
washing-machines and dishwashers — Specification
1 Scope
This document specifies the requirements for three types of rubber or plastics inlet hoses and hose
assemblies for washing-machines and dishwashers connected to the domestic water supply at a
pressure not exceeding 1 MPa (10 bar).
This document is applicable to the following types of hose:
— type 1: rubber hoses for unheated water supply (maximum temperature 70 °C);
— type 2: rubber hoses for heated water supply (maximum temperature 90 °C);
— type 3: plastics hoses for unheated water supply (maximum temperature 60 °C).
NOTE National requirements for hose fittings and hoses conveying drinking water can apply.
2 Normative references
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 188, Rubber, vulcanized or thermoplastic — Accelerated ageing and heat resistance tests
ISO 1307, Rubber and plastics hoses — Hose sizes, minimum and maximum inside diameters, and tolerances
on cut-to-length hoses
ISO 1402, Rubber and plastics hoses and hose assemblies — Hydrostatic testing
ISO 4671, Rubber and plastics hoses and hose assemblies — Methods of measurement of the dimensions of
hoses and the lengths of hose assemblies
ISO 4892 (all parts), Plastics — Methods of exposure to laboratory light sources
ISO 7326:2016, Rubber and plastics hoses — Assessment of ozone resistance under static conditions
ISO 8033, Rubber and plastics hoses — Determination of adhesion between components
ISO 10619-1:2017, Rubber and plastics hoses and tubing — Measurement of flexibility and stiffness — Part
1: Bending tests at ambient temperature
ISO 23529, Rubber — General procedures for preparing and conditioning test pieces for physical test
methods
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 10619 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 Classification
Hoses are designated as one of the following three types, depending on the hose material and the
temperature of the water supply:
— type 1: rubber hoses for a medium-temperature water supply (up to 70 °C) – for a maximum
working pressure of 1 MPa (10 bar);
— type 2: rubber hoses for a high-temperature water supply (up to 90 °C) – for a maximum working
pressure of 1 MPa (10 bar);
— type 3: plastics hoses for low temperature (up to 60 °C) water supply – for a maximum working
pressure of 0,8 MPa (8 bar).
5 Couplings and fittings
Hoses may be fitted with the appropriate type of coupling and end fitting to form hose assemblies.
NOTE Guidance on coupling types is given in ISO/TR 17784.
6 Materials and construction
The hose construction shall be as follows.
a) The hose lining shall consist of rubber for type 1 and type 2 or thermoplastics material for type 3.
b) The hose reinforcement shall consist of natural or synthetic textile material applied by any suitable
technique.
c) The hose cover shall consist of an ozone-resistant rubber for type 1 and type 2 or a weather-
resistant thermoplastics material for type 3. Alternatively, a stainless-steel braid may be used
instead of a cover.
The lining and the cover shall be of uniform thickness, concentric, fully gelled and free from visible
cracks, porosity, foreign inclusions and other defects which can cause the hose to be unserviceable.
7 Dimensions and tolerances
7.1 Inside diameters, tolerances and minimum wall thickness
7.1.1 Type 1 and type 2 hoses
The preferred values for the bore of the hose are 10 mm and 12,5 mm.
The tolerances on the bore depend on the characteristics of the end fittings; consequently, they shall be
agreed between the manufacturer of the hose and the constructor of the hose assembly but shall not
exceed the maximum tolerances specified in ISO 1307.
7.1.2 Type 3 hoses
When measured in accordance with ISO 4671, the inside diameter and minimum wall thickness of the
hose shall meet the requirements specified in Table 1.
Table 1 — Nominal bores, inside diameters, tolera
...