Hydro Testing of Air Receiver Tanks.

The insurance inspector/surveyor's report shedule will give guidance. In the UK, pressure systems must have a written scheme of examination, and this item is best discussed with the relevant insurance company.

As a french Inspector, I'm familiar with this Hydro procedure i,n France. The duration of this test is not clearly defined by the Standards. In practice, all factories used to take 30 min. In effect, if any leak was to occur, it should occur immediately orwithin a few minutes after starting.

My 1st answer was directed to guest N°1. Anyway, to complete my answer, the duration of the Hydro Testing is not related to the capacity of the tank. Nevertheles, some Engineering Cy may ask for One hour testing (it happenned to me). The reason was because the tank was a spiral heat exchanger of 20 tons and the inner metal sheets were withstanding a lot of fatigue. Note that with one hour instead of 30 min, the fatigue is increasing. The soldering of those sheets were working hard (we can hear the crack sound) and could have broken slightly as small cricks. This hydro test is always followen by an air (or nitrogen) pressure test to confirm NO leakage.

I don't know any code or standard which relates the test pressure with the tank volume.

But hydrostatic (or pneumatic) testing are usually ruled by the design code and the local laws. According to what code are the tanks constructed? Have a look on it and surely you'll find the requirements on pressure level and minimum time at pressure.

Best regards

First question is where are you located on the planet? Different countries, different codes in most cases.

Second question being what is the application and will it be transported over the road or stationary?

United States has Department of Transportation codes applicable to containers and vessels transported over the road.