Determination Of Plastic Hose
Minimum length of specimen hose, excluding end pipe connections. It should be 5 times the nominal diameter of the hose, or the length of 1 m. If the length of the two is the same, if the length is less than 1m, then complete the root hose or hose assembly.
Put the hose in one plane as flat as possible and plug one end of the hose with a metal plug so that it does not leak. A solid ball is inserted into the hose. Then the opening end of the hose is attached to a vacuum pump attached to the vacuum table, and the internal pressure of the hose is lowered to the specified test pressure in 60s and the pressure must not be less than 10min.
At the same time, check the pressure of the test, check whether there are sunken or collapsing conditions outside the hose, and then tilt the test hose, make the ball pass through the hose, and check whether the hose has any obstacles caused by internal deformation.
A sealing plug made from a transparent material at one end of the hose is attached to a vacuum pump with a vacuum table, and the internal pressure of the hose is reduced to the pressure value of the military aid test in 60s and no less than 10 cliffs in min.