How to Pressure Test Chemical Hose Hydrostatic Testing to Avoid Costly Spills
WARNING: HYRDROSTYATIC TESTING OF CHEMICAL HOSE ASSEMBLIES SHOULD BE COMPLETED ONLY BY A SPECIALIST WITH THE CORRECT TESTING EQUIPMENT AND PROTECTIVE GEAR. PLEASE USE WORK WITH CERTIFIED CHEMICAL HOSE SUPPLIERS TO COMPLETE TESTING.
Specialists completing the pressure testing should ensure the area in which hoses are being tested is conducive to the safety of those participating in testing, those surrounding the testing area, and will not accidentally damage the chemical transfer hose assembly being tested. All those participating should have completed proper training, be aware of NAHAD standards, and be using appropriate protective equipment.
Fully crimped hose assembly should be uncoiled and rolled out straight. Specialist will walk the length of the extended hose and complete visual inspection to ensure no kinks or visually apparent damage is seen in the hose construction. Note the exact location of crimped fittings on hose so that specialist can ensure testing does not cause fittings to slip or slide to any degree.
Connect chemical hose assembly to hydrostatic pressure testing system with testing fittings of the same or higher-pressure ratings than the pressure being tested.
Fill hose with water until all air has been extracted from the hose tube. Close the valve and ensure the assembly has been sealed. Increase pressure to 1.5x the hose’s rated working pressure. Maintain that pressure for at least 5 minutes. During the 5-minute testing period walk the length of the hose to visually check for leaking or any other noticeable issues. Evaluate prior location of crimped fittings to ensure no slippage has occurred during testing. This helps confirm a successful crimp. Slowly lower pressure until the chemical resistant rubber hose returns to an equilibrium pressure. Remove test fittings and drain water.
Should the chemical hose tube, cover, or chemical hose fittings show leakage or failure at any point during the testing process the full hose assembly should be marked for review and disposal. If applicable, feedback should be given to any vendors supplying component parts identified as contributing to the failure.
After successful completion of pressure testing the passing hose assembly should be tagged with stainless steel plating to reflect the date of testing and hose identification number. At that point the chemical transfer hose assembly or assemblies can be cleaned, coiled, and wrapped for shipment or pick-up. The chemical transfer system can then be installed or reinstalled with confidence that it has completed hydrostatic pressure testing before use or has maintained its pressure resistant integrity while in use and can safely be reinstalled.