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.
When collectors locate an old watch, they may wonder if it is a valuable antique. Watches that are at least 100 years old are antique while vintage watches must be at least 25 years old. However, vintage also refers to the era in which the watch became popular. For instance, a Swatch from the early â80s is a vintage item while a pocket watch from 1875 is an antique. Experts may use the terms vintage and antique interchangeably since classic watches can be both antique and vintage.