Mr Duwe6,
In our case...There is a single chamber, in top of the section, design pressure is 7.8 kg/cm2 (g) and at bottom section, design pressure is 8.2 kg/cm2 (g)... and the governing MAWP is 8.1 kg/cm2 (g) which is governed by shell of the top section... but as per definition of MAWP, MAWP...