April 11, 2017
Hydro testing a boiler is one way to check that you have proper seals on the tubes, flanges, fittings, and connections. This test takes place on new boilers or after any major pressure vessel work.
To begin the test, a hydro pump is used to help fill the boiler with water. The water is pumped into the vessel to the maximum allowable working pressure (M.A.W.P.) and brought to 1.5 x the M.A.W.P.
It is recommended to not use cold water to hydro test a boiler. If you use cold water it will cause the metal tubes to shrink and leak. It is best to let the water sit for approximately 24 hours before performing the test so the water will warm up.
After the boiler is filled with water it will be inspected for leaks. If the boiler has any leaks, the needle on the gauge will drop. A service company will typically perform the hydro test and a technician will sign off that the boiler has either passed or failed the inspection.
Hydro testing is a safe way to check that your boiler is free from any pinhole leaks and cracks. LEL offers a Boiler Reconditioning Program or hydro testing on any boiler that you purchase from us.
Please check out our Youtube channel to watch us hydro a 200 HP Hurst boiler.
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