One of three basic hydrocarbon classifications found naturally in crude oil. Naphthenes are widely used as petrochemical feedstock. Examples are: cyclopentane; methyl-,ethyl, and propylcyclopentane
EESiFlo North America, Terminology and Glossary: Fuel and Oil Terms, Pennsylvania, USA 2002. flowmeterdirectory.com/flowmeter_terminology, (Oil - Amer) {564}