دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a measure of heating value for natural gas that is free of moisture. Contractually, natural gas may be defined as dry" even though it does contain some water vapor, typically less than 7 pounds per million cubic feet (3.2 kilograms per million cubic metres). This standard of measurement reflects the conditions under which natural gas is usually actually delivered for first sales.