BS ISO 4079:2015 pdf free
BS ISO 4079:2015 pdf free.Rubber hoses and hose assemblies一Textile-reinforced hydraulic types for oil-based or water-based fluids一Specification
Five types of hose are specified, distinguished by their construction, working pressure and minimum bend radius:
一Type 1TE: hoses with a single braid of textile reinforcement.
一Type 2TE: hoses with one or more braid(s) of textile reinforcement.
一Type 3TE: hoses with one or more braid(s) of textile reinforcement (higher working pressure).
一Type R3: hoses with two braids of textile reinforcement.
一Type R6: hoses with a single braid of textile reinforcement.
NOTE Type 1TE is not subjected to the impulse or vacuum resistance tests. Type R3 is not subjected to the vacuum resistance test. Type R6 is not subjected to the impulse or vacuum resistance tests.
Hoses shall consist of a rubber lining that is resistant to water- and oil-based hydraulic fluids, 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.
Hose assemblies shall be manufactured only with those hose fittings whose functionality has been verified in accordance with 7.2, 7.4, 7.5 and 7.6. The manufacturer’s instructions shall be followed for the preparation and fabrication of hose assemblies.The requirements for type and routine testing are given in Annex A and recommendations for periodic testing in Annex B.
When tested in accordance with ISO 1402 or ISO 6605 at the relevant proof pressure given in Table 3 and the relevant minimum burst pressure given in Table 4, the hoses and hose assemblies shall not leak.When determined in accordance with ISO 1402 or ISO 6605, the change in length of hoses at the maximum working pressure (see Table 5) shall not exceed +2 % or -4 % for hoses up to and including nominal size 31,5 and +5 % or 0 % for hoses above nominal size 31,5. Use test pieces having a length at least four times the minimum bend radius. Measure the hose outside diameter with callipers in the straight-lay position before bending the hose. Bend the hose through 180° to the minimum bend radius and measure the flatness with the callipers according to ISO 10619-1 method.
When the hose is bent to the minimum bend radius given in Table 6, measured on the inside of the bend,the flatness shall not exceed 10 % of the original outside diameter.BS ISO 4079 pdf free download.
