ISO 4641-2010 pdf free download

ISO 4641-2010 pdf free download.Rubber hoses and hose assemblies for water suction and discharge Specification
Tuyaux et flexibles en caoutchouc pour aspiration et refoulement d’eau — Specifications.
— Type 1: Light-duty hoses for suction service to —0.063 MPa (—0,63 bar) and for discharge pressures up to 0,3 MPa (3 bar).
— Type 2: Medium-duty hoses for suction service to —0,08 MPa (—0,8 bar) and for discharge pressures up to 0,5 MPa (5 bar).
— Type 3: Heavy-duty hoses for suction service to —0,097 MPa (—0,97 bar) and for discharge pressures up to 1.0 MPa (10 bar).
5 Couplings and end fittings
Hoses shall be fitted with end fittings/couplings to form hose assemblies, Annex C lists types of coupling and end fitting.
6 Materials and construction
6.1 Lining
The lining shall consist of suitably compounded water-resistant natural or synthetic rubber. Its internal surface shall be smooth and free from imperfections which could impair the expected use.
6.2 Reinforcement
The reinforcement shall consist of a suitable textile material and may contain a helix that can be metallic wire
or of another suitable material.
6.3 Cover
The cover shall consist of suitably compounded natural or synthetic rubber. Its external surface may be corrugated or fluted. An external helix is optional and can be either metallic wire or of another suitable material.
7 Dimensions and tolerances
7.1 Bore (inside diameter)
The nominal size range is 16 to 315 with bore diameters and tolerances as shown in Table 3.
7.2 Enlarged ends
Where enlarged ends are required, the dimensions and tolerances shall be specified by agreement between the purchaser and the manufacturer. The design of the enlarged end shall take into account the hose performance requirements.
7.3 Unit lengths
The unit lengths shall be determined according to the conditions of use as specified by the purchaser. The tolerances, unless otherwise agreed between the purchaser and the manufacturer, shall be those specified in ISO 1307:2006. Table 2.
7.4 Lining
When measured in accordance with ISO 4671. the minimum thickness of the lining shall be 1.5 mm. See
Table 4.
7.5 Cover
When measured in accordance with ISO 4671, the minimum thickness of the cover shall be 2 mm. If the cover is fluted, the depth of the flutes shall be not greater than 50 % of the cover thickness. See Table 4.
8 Physical properties
8.1 Rubber compounds
8.1.1 General
Wherever possible, all tests shall be carried out on test pieces Cut from the finished hose. Otherwise, take samples from test sheets prepared in accordance with ISO 2393 and vulcanized to the same degree as the hose.
The physical properties of the rubber compounds used for the lining and cover shall conform to the values given in Table 1.
8i.2 Tensile strength and elongation at break of rubber lining and cover
When tested in accordance with ISO 37, the lining and cover shall have a tensile strength and elongation at break of not less than the values given in Table 1.ISO 4641-2010 pdf free download.