BS EN ISO 04641-2016 pdf download – Rubber hoses and hose assemblies for water suction and discharge — Specification (ISO 4641:2016)
This document specifies the minimum requirements for textile-reinforced, smooth-bore rubber water-suction and discharge hoses and hose assemblies.
Three types of hoses and hose assemblies are specified according to their operating duty requirements,i.e.their ambient and water temperature ranges:
-ambient temperatures:-25°C to +70 C;
– water temperatures during operation: 0 °C to +70 °℃.
The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document. For dated references,only the edition cited applies. Forundated references, the latest edition of the referenced document (including any amendments) applies.ISO 37,Rubber, vulcanized or thermoplastic —Determination of tensile stress-strain properties
ISo 188,Rubber, vulcanized or thermoplastic —Accelerated ageing and heat resistance tests
IS0 1307:2006, Rubber and plastics hoses — Hose sizes, minimum and maximum inside diameters, andtolerances on cut-to-length hoses
ISO 1402,Rubber and plastics hoses and hose assemblies — Hydrostatic testing
ISO 2393,Rubber test mixes — Preparation, mixing and vulcanization — Equipment and procedures
ISO 4671, Rubber and plastics hoses and hose assemblies —Methods of measurement of the dimensions ofhoses and the lengths of hose assemblies
ISO 7233:2016, Rubber and plastics hoses and hose assemblies — Determination of resistance to vacuumIS0 7326:2016, Rubber and plastics hoses —Assessment of ozone resistance under static conditionsISO 8033,Rubber and plastics hoses — Determination of adhesion between components
ISO 8331，Rubber and plastics hoses and hose assemblies — Guidelines for selection, storage, use andmaintenance
ISO 10619-1,Rubber and plastics hoses and tubing -Measurement of flexibility and stiffness — Part 1:Bending tests at ambient temperature
ISO 10619-2:2011,Rubber and plastics hoses and tubing — Measurement of flexibility and stiffness 一Part 2: Bending tests at sub-ambient temperatures
3Terms and definitions
For the purposes of this document, the terms and definitions given in IS0 8330 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
Hoses and hose assemblies for this application are classified into three types according to their operating duty requirements.
— 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 Coupling and 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
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.
The reinforcement shall consist of a suitable textile material and may contain a helix that can be metallic wire or of another suitable material.
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 in mm as shown in Table 3.
7.2 Enlarged ends
Where enlarged ends are required, the dimensions and tolerances shall be specified by agreement etween 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.BS EN ISO 04641 pdf download.