Practice of in-service tank cleaning of crude oil tank

Imperfection in oil tank cleaning with human or mechanical method seems distressed issue to deal with in field, while site facilities in hand is effective to in-service jet the dead oil with hot oil of tank. Pilot experiments with the hot oil jetting launched in the ShanShan Initial Pumping Station of West Oil Pipeline. 4 oil tanks hot-oil jetted, and a satisfactory result appeared with a < 0.5-m height dead oil. The experience showed that the total costs in tank cleaning for individual oil tank could be saved up to 2.095 million ￥RMB/yr, not directly discharging benzene, anthracene and pyrene to pollute environment. The practice displayed that the method could be in-service operated to enable it to improve the capacity of tank with the shortcutting, environmentfriendly and economic features. On the other hand, this method could be a fundamental laid for a long-term and safe operation of oil tank and a new concept to work with in in-service dead oil cleaning inland.