ISO 3862:2020 pdf download.Rubber hoses and hose assemblies Rubber-covered spiral wirereinforced hydraulic types for oil-based or water-based fluids Specification.
1 Scope
ISO 3862 specifies requirements for five types of spiral-wire-reinforced hydraulic hoses and hose assemblies of nominal size from 6,3 to 51.
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 for types 4SP and 4SH hoses and from —40 °C to +120 °C for types R12, R13 and R15 hoses;
— 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.
ISO 3862 does not include requirements for end fittings. it is limited to requirements for hoses and hose assemblies.
NOTE it is the responsibility of the user, in consultation with the hose manufacturer, to establish the compatibility of the hose with the fluid to be used.
4 Classification
Five types of hoses are specified, distinguished by their construction, working pressure and oil resistance:
— Type 4SP: medium-pressure hoses with four plies of steel wire spiral.
— Type 4SH: high-pressure hoses with four plies of steel wire spiral.
— Type R12: heavy-duty high-temperature hoses with a medium-pressure rating having four plies of steel wire spiral.
— Type R13: heavy-duty high-temperature hoses with a high-pressure rating having a multiple-steelwire spiral.
— Type R15: heavy-duty high-temperature hoses with an extra-high-pressure rating having a multiplesteel-wire spiral.
5.2 Hose assemblies
Hose assemblies shall be manufactured using hoses conforming to the requirements of this document.
Hose assemblies shall be manufactured only with those hose fittings whose correct functioning has been verified in accordance with 72. Z4. ZS and 76. The manufacturer’s instructions shall be followed for the preparation and fabrication of hose assemblies.
6 Dimensions
6.1 Hose diameters and hose concentricity
When measured in accordance with Iso 4671, the inside diameter of hoses shall conform to the values given in Table 1.
When measured in accordance with ISO 4671, the diameter over reinforcement of hoses shall conform to the values given in Table 2.ISO-3862-2020