石油质量的计算,若不考虑计量时空气浮力的修正,则基本公式为: M=K·V_t·ρ_(20)式中 K——石油体积系数; V_t——石油t℃的体积,m~3; ρ_(20)——石油标准密度,g/m~3。 目前,在石油计量工作中,一般是用SY-I型密度计测出石油在某温度t时的视密度ρ_t,并用分度为0.2℃的全浸式水银温度计测出此时的油温t(t称为视温度)。根据这两个参数查GB1884～1885-80 The calculation of oil quality, if not considering the measurement of air buoyancy correction, the basic formula is: M = K · V_t · ρ_ (20) where K - oil volume factor; V_t - volume of petroleum t ℃, m ~ 3; ρ_ (20) - the standard density of petroleum, g / m ~ 3. At present, in the oil measurement work, the SY-I density meter is generally used to measure the apparent density ρ_t of oil at a certain temperature t, and the oil temperature t at this time is measured by an immersion mercury thermometer with an index of 0.2 ℃ (t known as temperature). According to these two parameters check GB1884 ~ 1885-80