Regarding the hydrostatic pressure of liquid columns
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When performing the SW6-2011 calculations, the hydrostatic pressure of the liquid column that needs to be entered is the hydrostatic pressure at the actual height of the operating medium (or the highest height it might reach). If the medium is air, it is not necessary to enter anything ； If the medium is a liquid, compare 5%, and then enter it. When performing a horizontal hydrostatic test on a vertical container, it is necessary to take the calculated hydrostatic test value and add the static pressure of the water column at the full water level; the resulting figure should then be rounded up (to one decimal place). Am I correct? Thank you all.
When it is determined to conduct a horizontal hydrostatic test on a vertical vessel, the test pressure specified in the SW6 main design parameters table is the rounded value corresponding to the horizontal hydrostatic pressure. Right.
Your understanding is likely correct; when rounding, it is necessary to determine to which digit the value should be rounded based on the actual circumstances. In particular, when the pressure used for the hydrostatic test is low, it cannot be rounded to an integer, as that would result in too large a rounding error.