Common technical requirements for sandblast hose

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Common technical requirements for sandblast hose

The sandblast hose is a rubber hose for wind-blasting, rust-removing, hemping, and wet blasting and dry blasting in engineering construction. Sandblast pipes are often used in shipbuilding, machining, painting and other industries. What are the technical requirements for sandblast pipes? As a professional manufacturer of sandblast pipes, let’s take a look at them.

First, the use of temperature requirements
The hose is used at a temperature of -40 to 70 °C.
Second, hydraulic requirements
1. The working pressure of the hose is not less than 0.63MPa.
2. When the hose is subjected to hydraulic test under twice working pressure, it should not seep water, no local bulging, no expansion and no other abnormal phenomena. The antistatic hose shall maintain the pressure for 1 min, its length shall not exceed 0.8%, the outer diameter shall not exceed 10%, and the twist per meter shall not exceed 60 ordm;
3. The burst pressure of the hose should not be less than 3 times the working pressure.

Third, the bending performance requirements
At 23 ° C, when the sandblast hose is tested with a minimum bend radius of 10 times the nominal inner diameter, the deformation KD value should not exceed 0.8 times the outer diameter D of the hose. (K is the outer diameter of the hose before bending and the ratio of the outer diameter after bending to the outer diameter before bending.) (-25 ± 2 ° C), there should be no cracking after bending.
Fourth, the electrical conductivity
Each “M” grade hose should not exceed 10/sup2; Ω. Each “Ω” class hose should not exceed 1MΩ.
Five, wear resistance
As the main performance of the sandblast hose, it is also the main basis for the user to distinguish the quality of the hose. According to method A of ISO 4649, the wear volume does not exceed 140 mm/sup3;Sixth, other performance
Other properties such as: interlayer adhesion strength, ozone resistance, mechanical properties under verification pressure, etc. are also indicators for considering the quality of sandblasting tubes.