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.
Vintage items are usually regarded as things 25 to 74 years old which means they were made in the 1940s through 1970s and a lot of people can remember growing up with them. Anything newer than 25 years is generally labeled as a collectible. A true antique would be at least 100 years old, says 2nd Time Around Antique Mall owner Claudia Reese of Twin Falls, Idaho, who has been studying and selling antiques for 20 years. But in the 21st century this term is also commonly used when referring to collectibles that aren't that nearly that old, she notes.