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.
Many people have come to realize that if antique furniture is made with a high enough quality to last over 20 years then it is much more likely than new furniture to last another 20 or more years. Another aspect to consider about antique furniture is that should be in its original condition and not altered in any way. This definition is also stretched in many cases because finding pieces in perfect condition after over fifty years is very difficult.