24 July 2003
including Change 1, Jan 2004 and Change 2, March 2005
in use, and the simultaneous use of heaters in a duplex fuel oil pump and heater set
where load conditions do not require this procedure. Avoid heating entire tanks. Limit
heating within a tank to heating at the suction point only. With respect to residual fuel
oil tanks, frequent tank changes (utilizing the full capacity of the tank, from max full to
max drawdown, extending to the tank bottom) should be encouraged as a means of
precluding sludge buildup.