BS ISO 1436:2020 pdf free.Rubber hoses and hose assemblies — Wire- braid-reinforced hydraulic types for oil-based or water-based fluids — Specification.
7.4.2 Water-based fluid impulse test
The impulse test shall be in accordance with Iso 6803 or ISO 6605. The test fluid temperature shall be 70 °C. The test fluid used shall be HFC, HFAE, HFAS or HFB as defined in Iso 6743-4.
For type 1ST, 1SN and R1AT hoses, when tested at an impulse pressure equal to 125 % of the maxinium working pressure for hoses of nominal size 25 and smaller, and at 100 % of the maximum working pressure for nominal size 31,5 and above, the hoses shall withstand a minimum of 150 000 impulse cycles.
For type 2ST, 2SN and R2AT hoses, when tested atari impulse pressure equal to 133% of the maximum working pressure, the hoses shall withstand a minimum of 200 000 impulse cycles.
There shall be no leakage or other evidence of failure before reaching the specified number of cycles. This test shall be considered a destructive test, and the test piece shall be discarded after the test. The following test can he used as an option to maximize test efficiency by reducing the amount of testing needed:
a) oven-age assemblies filled with one of the water-based fluids specified in Z42 for 120 h at 70 °C; b) impulse-test the aged assemblies using an oil-based hydraulic fluid at a temperature of 100 °C.
For type 1ST, 1SN and R1AT hoses, when tested at an impulse pressure equal to 125% of the maximum working pressure for hoses of nominal size 25 and smaller, and at 100 % of the maximum working pressure for nominal size 31,5 and above, the hoses shall withstand a minimum of 150 000 impulse cycles.
For type 2ST, 2SN and R2AT hoses, when tested atan impulse pressure equal to 133% of the maximum working pressure, the hoses shall withstand a minimum of 200 000 impulse cycles.
There shall be no leakage or other evidence of failure before reaching the specified number of cycles. This test shall he considered a destructive test, and the test piece shall be discarded after the test.
7.5 Leakage of hose assemblies
When tested in accordance with ISO 1402 or ISO 6605, there shall be no leakage or other evidence of failure. This test shall be considered a destructive test, and the test piece shall be discarded after the test.
7.6 Low temperature flexibility
When tested in accordance with method B of ISO 10619-2:2017, Clause 6 at a temperature of —40 °C, there shall be no cracking of the lining or cover. The test piece shall not leak or crack when subjected to a proof pressure test in accordance with ISO 1402 or ISO 6605 after regaining ambient temperature.
7.7 Adhesion between components
When determined in accordance with ISO 8033, the adhesion between lining and reinforcement and between cover and reinforcement shall be no less than 2,5 kN/m for type 1ST, 2ST, ISN arid 2SN hoses arid no less than 1,8 kN/m for type R1AT and R2AT hoses.
BS ISO 1436 pdf download.