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.
It could also refer to an elderly woman who opts to sell her great-grandmother's jewelry, and thus this jewelry might be of an age to be considered antique. Consequently, the term estate thus can have very little bearing on age or value. Vintage Jewelry. Vintage is a term applied to objects or jewelry of some age. Usually people think of vintage in relation to items with an age of at least 25 years old, but again this is not consistent - it can vary from person to person or dealer to dealer. Vintage jewelry is frequently applied to costume jewelry from, say the 1950s, 1960s or 1970s. However, the term antique jewelry most often refers to items over 100 years old, therefore, anything newer may be termed vintage or estate.