BS ISO 4079:2020,Rubber hoses and hose assemblies — Textile-reinforced hydraulic types for oil-based or water-based fluids — Specification.BS ISO 4079:2020 pdf free download.
BS ISO 4079:2020 specifies requirements for five types of textile-reinforced hydraulic hoses and hose assemblies of nominal size from 5 to 100.
They are suitable for use with:
— oil-based hydraulic fluids HH, HL, HM, HR and HV as defined in ISO 6743‑4 at temperatures ranging from −40 °C to +100 °C;
— water-based fluids HFC, HFAE, HFAS and HFB as defined in ISO 6743‑4 at temperatures ranging from −40 °C to +70 °C;
— water at temperatures ranging from 0 °C to +70 °C.
BS ISO 4079:2020 does not include requirements for end fittings. It is limited to requirements for hoses and hose assemblies.
2 Normative references
ISO 1402. Rubber and plastics hoses and hose assemblies -Hydrostatic testing;
ISO 1817, Rubber, vulcanized or thermoplastic-Determination of the effect of liquids;
ISO 4671, Rubber and plastics hoses and hose assemblies- Methods of measurement of the dimensions of
hoses and the lengths of hose assemblies;
ISO 6605, Hydraulic fluid power- Test methods for hoses and hose assemblies.
5 Materials and construction
5.1 Hoses
Hoses shall consist of a rubber lining that is resistant to oil- or water-based hydraulic Fluids or water, one or more layers of suitable textile yarn and a weather-and oil-resistant rubber cover.
Hoses shall be designed to enable end fittings to be assembled without removal of the cover.
5.2 Hose assemblies
Hose assemblies shall be manufactured using hoses conforming to the requirements of this document for the preparation and fabrication of hose assembler.
Hose assemblies shall be manufactured only with those hose fittings whose correct functioning has been verified in accordance with 7.2, 74, 7.5 and 76. The manufacturers instructions shall be followed.