1、 Sandblasting pipe Improper selection of the amount and speed of crimping when assembling with the joint, or unreasonable selection of the structure, material and size of the joint, can lead to too tight or too loose pressure between the hose and the joint, resulting in early damage at the joint.
2. The inner and outer layers of sand blasting pipe wall are oil resistant rubber, and the middle layer is (2-4 layers) cross braided steel wire or winding steel wire. Poor quality hose will appear: uneven thickness of hose wall; The steel wire braiding is too tight, too loose or the number of steel wire layers is too small; The deformation (elongation, shortening or bending deformation) of the rubber hose after pressurization is large, the poor air tightness of the outer layer of rubber leads to corrosion of the steel wire, and the poor sealing of the inner layer of rubber leads to the easy entry of high-pressure oil into the steel wire layer; The adhesive force between adhesive layer and steel wire layer is insufficient. The above conditions will reduce the bearing capacity of the hose and eventually burst at the weak part of the pipe wall.
During assembly, if the amount of crimping is too small, that is, if the pressure between the joint and the hose is too loose, the hose may come out of the joint at the beginning of use under the action of oil pressure; If the amount of buckling is too large, the joint and the rubber hose are pressed too tightly, which is likely to cause local damage to the inner layer of the rubber hose, causing cracks. High pressure oil will enter the steel wire layer directly from the crack, and then move along the gap between the steel wires to the tail of the jacket, or move along the steel wire layer to a certain place to accumulate, causing the outer layer of rubber to bulge or even break.
During the assembly of sand blasting pipe and joint, if the buckling speed is too fast, it is easy to cause damage to the inner rubber and fracture of the steel wire layer, which will cause premature damage of the rubber pipe in use.
