DENSITY AND API GRAVITY
Density : Mass per unit volume
API Gravity : Crude density is commonly measured in API Gravity
FLASH POINT
The lowest temperature at which a volatile liquid can vaporize to form an ignitable mixture in air.
RVP (REID VAPOUR PRESSURE)
It is the pressure exerted on the surface of the crude at 100f under specific conditions for higher vapor loss, transportation loss is also higher. The range normally lies between 2-15 psi. It is the sum of hydrocarbon vapor, water vapor and air.
BS & W (BASIC SEDIMENT AND WATER))
It is a measure of the amount of non hydrocarbons (sand, sediment etc) and water. A standard quantity of crude oil is taken in a calibrated tube using a centrifuge, the sediment are allowed to settle. The amount of sediments is directly read off the tube. The acceptable range of BS&W generally less than 0.5%.
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