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.
In most states it is 25 years or older. Some states are as few as 20 years and some as much as 50. In my state (Colorado) they do not have Classic or Antique but 25 years is a Collector and 50 is a Vintage (called Horseless Carriage for cars) To get discounted tags it MUST be vintage. Collector tags are the same price (per year) as normal tags, but are sold for 5 year periods. slimcolo Â· 7 years ago.