FoxRox
Mechanical
- Feb 12, 2015
- 349
I searched the forum and only came across this one old thread with no replies:
A client has specified horizontal UL 142 tanks to store a liquid with a specific gravity over 1.0. Attempts to push them to a more suitable design standard have proved futile. Thus, we are pushed into section 12, which gives only a few options for designing the tank. 12.2(b) gives the option for a section 43 hydrostatic strength test (as opposed to the much more feasible section 42 pressure testing).
Using 12.2(b) as stated, the test pressure would need to be about 13.5 psi, but Section 43 requires 25 psi. Both of these pressures are much to high for a typical storage tank design. ASME F&D heads or 2:1 elliptical heads would be required to avoid damaging the tank during the hydrotest, but this is overkill for an atmospheric tank.
Has anyone here ever had to use section 43? Can anyone provide any insights as to the intent/purpose of the "Hydrostatic Strength Test"? It's hard to imagine a reason for testing a storage tank to 25 psi.
A client has specified horizontal UL 142 tanks to store a liquid with a specific gravity over 1.0. Attempts to push them to a more suitable design standard have proved futile. Thus, we are pushed into section 12, which gives only a few options for designing the tank. 12.2(b) gives the option for a section 43 hydrostatic strength test (as opposed to the much more feasible section 42 pressure testing).
Using 12.2(b) as stated, the test pressure would need to be about 13.5 psi, but Section 43 requires 25 psi. Both of these pressures are much to high for a typical storage tank design. ASME F&D heads or 2:1 elliptical heads would be required to avoid damaging the tank during the hydrotest, but this is overkill for an atmospheric tank.
Has anyone here ever had to use section 43? Can anyone provide any insights as to the intent/purpose of the "Hydrostatic Strength Test"? It's hard to imagine a reason for testing a storage tank to 25 psi.
