1.  First of all, look at the surface vulcanized rubber of the hydraulic hose to see if the surface is smooth and smooth, whether it is bubbled, protruded, sponges, sand holes, etc.; When detained, the vulcanized rubber should be removed with a peeling machine to see whether the torn vulcanized rubber is sustainable, and the sustainable is cost-effective.

2, from the surface, the gloss of the cross-section of the rubber hose, the brighter is the best product, and the collagen fiber layer should be well ductility of the collagen fiber.

3, from the cross-section of the rubber hose to see whether the stainless steel wire layer inside is symmetrical, from the diameter of the stainless steel wire to distinguish. Rubber hose wire mesh all over symmetrical, no leakage knitting place, the diameter of the inner layer of stainless steel wire thicker the higher.

4. See whether the wall thickness of the vulcanized rubber layer in the inner layer is symmetrical or not, and the size of the internal thread of the rubber hose. Try the standard connector to identify it.

5, according to the stability test, the national industry standard stipulates that the experimental working pressure is 2 times the pressure, and the engineering blasting working pressure is generally 3-4 times the pressure.

6, poor quality rubber hose will appear: the thickness of the rubber wall is uneven; Stainless steel wire hand-woven too tight, too loose or stainless steel wire overlay number is too small; The shape variable (the shape variable of stretching, reducing or bending) after the pressure of the rubber hose is large; Poor sealing of surface rubber causes rust of stainless steel wire; The inner layer of adhesive is poor in tightness and then the high pressure oil enters the stainless steel wire layer casually; Adhesive and stainless steel wire layer adhesion is not enough. The above mentioned situations will reduce the bearing capacity of the rubber hose, and finally crack at the lack of wall thickness.