BS ISO 6804:2016 download

06-26-2021 comment

BS ISO 6804:2016 download.Rubber and plastics inlet hoses and hose assemblies for washing-machines and dishwashers — Specification.
1 Scope
BS ISO 6804 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 I MPa (10 bar).
It is applicable to the following types of hose:
— type I: rubber hoses for unheated water supply (maximum temperature 70 SC);
— type 2: rubber hoses for heated water supply (maximum temperature 90 SC):
— type 3: plastIcs hoses for unheated water supply (maximum temperature 60 C).
There may be national requirements for hose fittings and hoses conveying drinking water which must
be complied with.
2 Normative references
The following documents are referred to In the text en such a way that some or all of their content constitutes requirements of BS ISO 6804. 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 therrrwplastic — 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 n,easurement of the dimensions of hoses and the lengths of hose assemblies
ISO 4892 (all parts). Plastics — Methods of exposure to laboratory light sources
ISO 7326:2006, Rubber and plastics hoses — Assessment of ozone resistance under static conditions ISO 8033, Rubber and plastics hoses — Determination of adhesion between components
ISO 8331. Rubber and plastics hoses and hose assemblies — Guidelines for selection, storage, use and maintenance
ISO 106194:2011, Rubber and plastics hoses and tubing — Measurement of flexibility and stAffness — Part 1: BendIng tests at ambient tern perature
ISO 23529, Rubber — General procedurtsfor preparing and conditioning test pieces for physical test methods
3 Termsanddefinitions
For the purposes of BS ISO 6804, the terms and definitions given in ISO 8330 apply.
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 I MPa (10 bar).
Type 2: Rubber hoses bra high-temperature water supply (up to 911°C) — for a maximum working pressure oil MPa (10 bar).
Type 3: Plastics hoses for low temperature (up to 60 °C) water supply — for a maximum working pressure of 0,8 PAPa (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 lSO/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 I and type 2 or a weather- resistant thermoplastlcs material for type 3 (or, 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 could cause the hose to be unserviceable.
7 Dimensions and tolerances
7.1 Inside diameters, tolerances and minimum wall thickness
7.1.1 Type I 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 will 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.
After ageing. the hose assembly shall be emptied, refilled with water at the specified temperature and again tested at a pressure of 2,1 MPa (31.5 bar) for type 1 and type 2, and 1,7 MPa (17 bar) for type 3 by the method specified in iSO 1402 1cr 1 mm.
During the pressure test, the hose assembly shall not burst or show deFects such as leakage or blisters, nor shall there be evidence olcoupling slippage.
8.7 Resistance to ozone or weathering
8.7.1 Resistance to ozone (type I and type 2 hoses)
The resistance to ozone test shall be carried out in accordance with ISO 7326:2006, method 1.
The hose test piece shall be tested in an atmosphere having an ozone concentration of (SO ± 5) pphm at (44J 2) for 72 h.
After testing, when viewed under a magnification of x 2, the cover shall show no evidence of cracking.
8.72 ResIstance to weathering (type 3 hoses)
The weathering test shall be carried out in accordance with the appropriate part oF ISO 4892.
The light sources and exposure conditions shall be selected by agreement between the interested parties. Unless otherwise specified, the light sources and exposure conditions indicated in Table 3 are recommended
After testing, the cover shall show no evidence of cracks or other defects which could cause the hose to be unserviceable.
9 Frequency of testing
Type testing and routine testing shall be as specified in Annex A.
Type tests are those tests required to confirm that a particular hose or hose assembly design, manufactured by a particular method from particular materials, meets all the requirements of this document. The tests shall be repeated at a maximum of flve.year intervals, or whenever a change in design, the method of the manufacture or materials used occurs.
Routine tests are those tests required to be carried out on each length of finished hose or hose assembly prior to dispatch.
Production acceptance tests are those tests, specified in Annex B. which should preferably be carried out on each batch to control the quality of manufacture. The tests specified in Annex B are given as a guide only.
10 Test certificate
A test certificate, If requested by the customer, shall be supplied by the manufacturer. The recommended contents of such a certificate are given in Annex C.
11 MarkIng
11.1 The hose shall be continuously and durably marked with the following minimum information:
a) the manufacturer’s name or trademark, e.g. XXXX;
b) the number and year of publication of this document, i.e. ISO 6804:2016;
c) the hose type. e.g. type 2, and maximum working pressure in MPa and bar with units stated:
d) the inside diameter, in millimetres, e.g. 10 mm;
e) the quarter and the last two digits of the year of manufacture. e.g. 3Q16.
EXAMPLE XXXX/ISO 6804:2016/type 2/1 UPs/b bar/b mm/3Q16.
11.2 When supplied as hose assemblies, at least one fitting shall be marked with the hose assembly constructors name or mark
12 Recommendations for packaging and storage
These are given in ISO 8331.

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