Crude oil topping units fill a need for crude oil producers that have domestic requirements for diesel, fuel oil, kerosene, AGO, LPG or asphalt but donât have total refining capacity. Essentially they are atmospheric distillation units that produce hydrocarbon boiling point cuts from resid to LPG. topping unit is an inexpensive, technically simple means to enhance the value of crude oil near the source of production. Crude oil distillation is an energy intensive process that requires crude oil heaters with cross heat exchangers.
In the U.S., the legal definition of an Antique is any item over 100 years old. The term Vintage is used to describe something that is second generation or older. So the toys your parents played with, or the clothes they wore when they were your age would be considered Vintage but not Antiques.
The terms collectible and vintage have both been hijacked, it's true. And the word antique, I don't even want to go there!! Here is the definition of these terms and the common usage of these terms in the antique business. Antique: an item that is at least 100 years old. This is the technically correct definition. However some items, like cars, for example, are often called antique because so few of them are over 100 years old.