| 摘要 |
PROBLEM TO BE SOLVED: To provide a feeding method of a raw oil to a storage tank in which contamination of a heterogeneous raw oil in a raw oil storage tank can be suppressed, and that is excellent in storage stability and economical efficiency.SOLUTION: A method in which two or more different raw oils are sequentially fed to each raw oil storage tank using the same receiving pipe arrangement, is characterized in that physical properties of a mixed oil of a raw oil input before that remains in the receiving pipe arrangement and a raw oil input after in the receiving pipe arrangement become within a range of a reference value, then changeover of each raw oil storage tank is performed. |
