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1、原油密度換算說明一、公式P20=P視+（T-20）rPt=P20-(t-20)d式中：P20——20℃下的原油標(biāo)準(zhǔn)密度P視——T溫度下測得的密度，即比重計(jì)上的讀數(shù)T——實(shí)測溫度℃r——溫度補(bǔ)正系數(shù)，查表-1得Pt——t℃下的原油標(biāo)準(zhǔn)密度d——溫度系數(shù)，查表-2得t——所要換算的某一溫度二、舉例，測得某原油的密度是0.7625,溫度是30℃,求20℃和50℃的原油標(biāo)準(zhǔn)密度.解:查表-1得r=0.000818注:查表-1時(shí),”視”比重一欄是范圍,如0.7625,查0.7600—0.7699行P20=0.7625+(30-20)×
2、0.000818=0.7707查表-2得d=0.00078注:查表-2時(shí),P20一欄是范圍,如0.7707查0.7641--0.7707行P50=P20-(50-20)d=0.7707-(50-20)×0.00078=0.7467表-1石油產(chǎn)品比重的平均溫度補(bǔ)正數(shù)表“視”比重補(bǔ)正數(shù)“視”比重補(bǔ)正數(shù)0.6900-0.69990.0009100.8500-0.85990.0006990.7000-0.70990.0008970.8600-0.86990.0006860.7100-0.71990.0008840.8700-0.87
3、990.0006730.7200-0.72990.0008700.8800-0.88990.0006600.7300-0.73990.0008570.8900-0.89990.0006470.7400-0.74990.0008440.9000-0.90990.0006330.7500-0.75990.0008310.9100-0.91990.0006200.7600-0.76990.0008180.9200-0.92990.0006070.7700-0.77990.0008050.9300-0.93990.0005940.7
4、800-0.78990.0007920.9400-0.94990.0005810.7900-0.79990.0007780.9500-0.95990.0005670.8000-0.80990.0007650.9600-0.96990.0005540.8100-0.81990.0007520.9700-0.97990.0005410.8200-0.82990.0007380.9800-0.98990.0005280.8300-0.83990.0007250.9900-1.00000.0005150.8400-0.84990.0
5、00712石油產(chǎn)品“視”比重?fù)Q算為實(shí)際比重的補(bǔ)正數(shù)表,本表包括用韋氏天平及比重瓶在實(shí)驗(yàn)溫度下所測定的石油產(chǎn)品.表-2石油密度溫度系數(shù)表P20dP20d0.5993—0.60420.001070.7381—0.74440.000820.6043—0.60910.001060.7445—0.75080.000810.6092—0.61420.001050.7509—0.75730.000800.6143—0.61930.001040.7574—0.76400.000790.6194—0.62440.001030.7641—0.7
6、7070.000780.6245—0.62950.001020.7708—0.77760.000770.6296—0.63470.001010.7777—0.78460.000760.6348—0.64000.001000.7847—0.79160.000750.6401—0.64530.000990.7917—0.79870.000740.6454—0.65060.000980.7988—0.80160.000730.6507—0.65600.000970.8062—0.81350.000720.6561—0.66150.
7、000960.8136—0.82110.000710.6616—0.66700.000950.8212—0.82900.000700.6671--0.67260.000940.8291—0.83700.000690.6727—0.67820.000930.8371—0.84500.000680.6783—0.68390.000920.8451—0.85330.000670.6840—0.68960.000910.8534—0.86180.000660.6897—0.69540.000900.8619—0.87040.0006
8、50.6955—0.70130.000890.8705—0.87920.000640.7014—0.70720.000880.8793—0.88830.000630.7073—0.71320.000870.8884—0.89760.000620.7133—0.71930.000860.89
