I would like to have expert advice for the procedure or best practice to handle the multiproduct pipeline interface at terminals. Specifically, at what point during the receiving of diesel/jet fuel interface we should divert jet fuel to it dedicated storage tanks. We receive jet fuel and motor Diesel through 30-inch pipeline from refinery that is 500 KM away. the Jet fuel is stored, settled and certified at the terminal before transferring to Airport depot. Our practice is to make the interface cut based on jet density, so that jet fuel is diverted to jet tanks after density matching the source density through online pipeline densitometer and manual density. The difficulty we have that the density matching ( delta density = 0 between the source tank density at refinery and in-plant measured density) can’t be achieved unless continue receiving at interface tank till delta density = 0 which takes long time and losing the quantity of jet fuel. This practice is used to ensure no diesel is received at jet tanks and consequently impact the jet properties, e.g. Freezing Point. I have read some industrial standards, like JIG 1530, but I am not sure of what is the specific density point where the jet should be diverted to its tanks. Also, I came across the terminology of “clean cut” but I am also not sure what does it refer to. Moreover, I read some procedures that allow +/- 3 digits of density variation from the source density to start receiving at jet tanks, still I am not sure if it is accepted and will not impact the jet properties.
I appreciate expert advice and sharing industrial practices.
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