Author: Site Editor Publish Time: 10-19-2022 Origin: Site
The process of testing hydraulic hoses is defined and evaluated by SAE/ISO/EN standards, which contain a variety of tests including hose structural integrity changes, burst and impulse testing. In this article, we will do a clear guidance about these 2 tests and its standard.
Burst test is a hydrostatic pressure test of the hydraulic hose assembly, which can determine the actual bursting strength of the hydraulic hose. It general set at basic 4times max working pressure and higher at testing. Any evidence of leaks, bulges, broken connections, or hose ruptures below the component's specified minimum burst pressure rating is considered a malfunction. Maximum burst pressure is a very important operating property that hydraulic hose technology must understand, respect and follow to ensure that the hydraulic hose can be used safely. Under normal circumstances, the burst pressure can be up to 4 times higher than the working pressure, and the burst pressure is much higher to ensure the safety of the hydraulic hose during normal operation.
Impulse testing is one of the key predictors of hose life. These pulse tests subject the hose assembly to a specific number of pulses (quick, very sharp pressure spikes) from 100% to 133% of the maximum operating pressure of the hose, at the maximum operating temperature, while with a certain bend radius, 90° or 180°, and keep this position for almost 3 days without stopping. (depending on pore diameter). To pass the test, the hose must meet or exceed twice the minimum number of pulse cycles per applicable industry standards.
