|
TERMS REL RELATING TING TO THE PETROLEUM INDUSTRY A B C D E F G H I j k L M N O P N NAFTA North America Free Trade Agreement Naphthene One of a group of cycle hydrocarbons, also termed cycloparaffins or cycloalkanes. Polycyclic members are also found in the higher boiling fractions. The general formula for naphthenes is CnH2n. Neutralization Number The weight, in milligrams, of potassium hydroxide needed to neutralize the acid in 1g of oil. The neutralization number of an oil is an indication of its acidity. Neutral Oil Light overhead cuts of lubricant stocks. Neutral oils are the basis for most commonly used automotive lubricants. NLGI Number One of a series of numbers classifying the consistency range of lubricating greases, based on the ASTM cone penetration number. The National Lubricating Grease Institute (NLGI) grades are in order of increasing consistency (hardness). NMMA National Marine Manufacturers Association NVMA National Vehicle Manufacturers Association
|
|
