Dear all

I have a Horizontally tank, without internal pressure. it have two supports. when leaktest by water may be the tank will distortion. i want to check this problem. can you show me the information for calculatate them.

thank you

You will need to consider the weight of the liquid at temperature. For example water @ 70F = 0.434#/cu in

http://www.codeware.com/support/papers/zick.pdf for white paper...

If the vessel was not designed to be filled with water there is no reason to design it only for the test. Test it pneumatically at a pressure 1.1 the pressure you designed it. If it is for no pressure and the test has only the sope to verify welds are tight, then apply a low pressure e.g. 1 mt water column. To avoid overpressure in parallel with the pipe carrying air into the tank, provide a hose immerged in 1 meter of water. When the pressure of 1 mt water column is exceeded the air will bubble out from the hose immersed.
Mauro