The Durability Test Method of Hydraulic Hose Assembly

Hydraulic hose is widely used in all walks of life. In order to ensure its safety, it is necessary to test its durability. Simulate the instantaneous change or cycle change of the working pressure of the hydraulic soft assembly under the specified conditions of use, so as to detect its fatigue life.

The test method is as follows:

1) Perform a durability (pulse) test on the hose assembly within 30 days of the assembled hose connector.

2) Calculate the free (exposed) length of the hose according to the formula.

3) The hose assembly is connected to the test device, and the bending degree of the hose should meet the standard.

4) The selected test oil should meet the requirements of the viscosity class ISOVG46, so that it can circulate in the hose assembly at a sufficient speed to maintain the same temperature.

5) Apply pulse pressure to the inside of the hose assembly, and its frequency is 0.5Hz-1.3Hz, and record the frequency of the test.

6) The pressure cycle curve should be as close to the standard curve as possible, and the pressure rise rate should be controlled between 100MPa/ S-350mpa /s.

7) Pulse test on the hose assembly, the pressure is 100%, 125%, 133% of the maximum working pressure of the hose assembly, and the test oil temperature is maintained at 100℃±3℃.

8) Determine the duration of the total pulse number of the pulse test, according to the product standard, the test can be carried out intermittently.

9) After completing the required total number of pulses, the hose assembly does not show failure phenomenon, then it is considered that the pulse test has passed.