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.
Technically, an antique is a piece of furniture with special value because of its age, particularly those pieces embellished with fine artistry. The age factor is subjective: general antique stores label objects 50 years or older as antiques. Fine antique dealers consider objects 150 years and older to be antique. In the East, an antique is Queen Anne or earlier; in the West, it's any piece of furniture that came across the mountains in a wagon.