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      • SAE 100 R1+EN 583 1SN
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      • EN856 4SP/4SH
      • EN857 1SC/2SC
      • Hydraulic Oil Hose 150℃
      • Flexible metal Hose
      • Airless Paint Spray Hose
      • Micro-Pressure Testing Hose
    • Industrial Hose
      • Air Hose
      • Water Hose
      • Oil Hose
      • Chemical Hose
      • Food Grade Hose
      • Steam Hose
      • Welding Hose
      • Material Handling Hose
      • Floating Marine Fuel Hose
      • Composite Hose
    • PVC Hose
      • Garden Water Hose
      • Layflat Discharge Hose
      • PVC Steel Wire Hose
      • PVC Suction Hose
      • PVC Clear Hose
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      • PVC High Pressure Spray Hose
      • Water Saving Irrigation Hose
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      • PU Braiding Hose
      • PA / PU Coil Hose
      • PA6, PA12 Nylon Hose
      • Double Layer PA Tube
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      • PU Steel Wire Duct Hose
      • PU Helix Duct Hose
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      • Vaccum Cleaner Hose
      • Nylon Fabric Duct Hose
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      • Aluminium Foil Bonded Duct Hose
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      • Silicone Vacuum Hose
      • Silicone Braided Hose
      • Silicone Steel Wire Hose
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      • Rubber Fuel Hose SAE J30 R6
      • Rubber Heater Hose SAE J20 R3
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      • Rubber Brake Hose SAE J1402
      • Rubber Conditioner Hose SAE J2064
      • Oil Cooler Hose SAE J1532
      • Power Steering Hose SAE J188
      • EPDM Radiator Hose
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      • TPU Layflat Hose
      • TPU Drag Hose
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2022-03-01未分类

In the previous article, we learn that there are salt mist and burst tests for hydraulic hose before production. Let’s learn the other tests this time.

 

Low temperature bending test.

 

Put the hydraulic hose assembly in the cryostat. Keep the cryostat temperature lower than the min working temperature of hose and keep the hose be straight. The test should last 24 hours. Then make a test on the mandrel. The diameter of mandrel is 2 times of the min bending radius of hose. After bending, return to the indoor temperature. If there is non crack on the hose, then make a pressure test.

 

The evaluation standard is that there shouldn’t be cracks on the hose and fittings. When return to the indoor temperature and make the pressure test, there should not be leakage and burst.

Impulse test

Impulse test in to forecast the hydraulic hose lifespan. The concrete steps are as follow.

  1. Bend the hose assembly to 90°or 180°and then install to the test facility.
  2. Charge relevant test medium and keep the temperature at around 100℃ when doing high temperature test.
  3. Pressure impulse to the inner tube and the test pressure should be 100%-135% of the max working pressure. The frequency should be 0.5 Hz -1.3 Hz.

 

There is another impulse test-torsion impulse test. This test requires one side of the hydraulic hose fixed and the other side connect to a horizontal move facility. The active side moves with a certain frequency.

 

After many times impulse that relevant standard requires, if hydraulic hose doesn’t lose efficiency, it pasts the test.

 

Although supplier has tested the hose many times, you should use the hose within the max working pressure. Not only for protect your hose and equipment, but also for the security of yourself. If you have some questions about the min bend radius and max working pressure, welcome to contact us. We will offer you helpful suggestions.

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