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.
Referring to an item as Antique usually means that it meets a certain age requirement. According to the US customs office, anything 100 years old or older is officially antique. But the true definition of Antique involves the concept of times past. If an item is considered to be from a different era or time period in human society, and is also fairly rare, then it may gain antique status without being 100 years old. Ebay makes a distinction for antiques at 1930 and before, which is not quite 100 years.