How to Test Chemical Hoses

Hoses can connect from one object to another in the transfer of chemicals and liquids such as petrol, chlorine, carbon dioxide and kerosene. Industrial plants use chemicals during manufacturing phases, to fuel equipment or even within dry powder fire extinguishers to put out dangerous blazes. To ensure the safety of workers and the proper operation of equipment, all equipment that transfers chemicals through hoses must be tested for kinks, leakage and signs of wear and tear.

Things You'll Need

• Hydrostatic test pump

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Instructions

• 1

  Visually inspect hoses and couplings. Extend the hose and use "in-service maximum operating pressures" to test the assemblies. Maintain a safe distance and note any abnormalities to the exterior of the casing. Discoloration can indicate material deterioration and bent hose lines can add to the further weakness of the hose's structure. Look for wet spots on the ground that can indicate a slow leak or the strong smell of chemicals along hose lines and around couplings.

• 2

  Operate a videoscope to allow for visual internal inspection of the hose. Drain the hose and bleed lines using demineralized water. Feed a flexible line with a video camera attachment into the opening. Study the video monitors as you check the interior hose for signs of corrosion or pitting of the hose lining.

• 3

  Pressure test smaller containers and cylinder hoses, such as on fire extinguishers, by using a hydrostatic test pump. Hydrostatic testing allows for pressure tests to find leaks by pressurizing the hoses with a liquid. Attach the pump's flexible connection onto the nozzle or hose outlet and send demineralized water into the line at maximum operating pressure inside a test chamber. Evaluate the gauge readings to see if there are any fluctuations of pressure from the liquid fed into the line.