When assembling the blasting pipe, if the amount of buckle is too small, that is, when the pressure between the joint and the hose is too loose, the hose may be released from the joint in the initial stage under the action of oil pressure; if the amount of buckle is too large, the joint and the If the hose is pressed too tightly, it will easily cause the inner layer of the hose to be partially damaged and cause cracks. High-pressure oil will directly enter the steel wire layer from the rupture, and then sprayed along the gap between the steel wires to the tail of the jacket, or it will continue to travel along the steel wire layer to a Build up everywhere, causing the outer layer of rubber to bulge or even crack. The inner and outer layers of the sandblasting pipe wall are oil-resistant rubber, and the middle is (2 to 4 layers) of cross-braided steel wire or wound steel wire. Poor quality hoses will appear: uneven wall thickness of the hose; steel wire braided too tightly, too loosely, or too few layers of steel wire; the amount of deformation (elongation, shortening or bending deformation) of the hose after compression is large; Poor air-tightness results in corrosion of the steel wire; poor sealability of the inner layer of glue allows high-pressure oil to easily enter the steel wire layer; insufficient adhesion between the glue layer and the steel wire layer. The above conditions will reduce the bearing capacity of the hose, and eventually burst in the weak part of the pipe wall.