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.
For those in the trade, however, this word does not just mean old, but signifies a minimum specific age and should not be applied to the â80s brick cell phone and, perhaps, not even to the depression-era handcrafted table. The Antiques Roadshow must regularly decide what is and what is not an antique. According to them, an antique is, [g]enerally speaking, an object of considerable age valued for its aesthetic or historical significance. In the antiques trade, the term refers to objects more than 100 years old..