Waiting on my preloaded trailer to arrive so I can get underway. Sitting at this pictured tank wash on Neville Island, just down river from Pittsburgh, PA. This building is where they clean the inside of the tanker so it’s ready to be loaded again.
Chemicals are loaded into trailers that are cleaned and dried. They are clean enough that you could eat out of them. I don’t actually know that but it sounds good.
Most lubricants are loaded into diesel flushed trailers. The diesel breaks down the remnants of the previous load. The trailers are then drained. There’s not enough diesel left in a flushed trailer to affect the next product loaded.
Some lubricants, that are extremely high grade, are loaded into trailers that have been cleaned like a chemical trailer would be. There is no room for impurities. An example would be turbine oil. The type of oil used at nuclear power plants for the turbines that generate electricity.
Other lubricants are top loaded. Meaning loaded into a trailer that has just carried the exact same product. These are normally dedicated trailers used over and over for the same customer and nobody else. Those types of trailers are normally cleaned on a predetermined basis. Perhaps after X number of loads or after X period of time.
In addition to them cleaning tanker trailers here, they also clean the hoses that are used for offloading. Diesel flushed. Some hoses are carried on the trailers in tubes or tubs that run along the side of the tanker being hauled. Other hoses, like mine, are hauled on my tractor. Just behind the sleeper on a hose rack. I carry 90’ of 3” hose.
Pumps also have to be cleaned. Diesel flushed. I have a PTO powered pump on the right side of my truck. It takes just over an hour to pump off 6500 gallons of a mid grade motor oil. Longer for thicker products and less time for thin products.