RVP
Reid Vapor Pressure is a vapor pressure for liquid products as
determined by ASTM test procedure D- 323. The Reid vapor pressure is defined as
pounds per sq in. at 100°F. The RVP is always less than the true vapor pressure
at 100°F.
TVP
True vapor pressure is the pressure at which the gas and liquid in a
closed container are in equilibrium at a given temperature.
The true vapour pressure is for everything by gas, liquid, solids, and
contaimenets.
The graphical method of
converting from RVP to TVP is an approximation and is generally more accurate
for lighter components IN GPSA.
.
TVP = (1.07) (RVP) + 0.6
WORKING PRESSURE
A design working pressure can be determined to prevent breathing, and
thereby save standing storage losses. Generally there are regulatory
requirements specifying the type of storage tank to be used, based on the
storage tank capacity and the vapor pressure of the product being stored.
Formula and graph in GPSA
what I the source of this formula?
ReplyDelete