دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a wrapping material consisting of asbestos saturated with asphalt;one element of pipeline coatings. It is no longer commonly used because asbestos can cause respiratory illness.

asphaltene.

n: a hard brown or black material composed principally of hydrocarbons. It is insoluble in water but soluble in gasoline and can be obtained by heating some petroleum, coal tar, or lignite tar. It is used for paving and roofing and in paints.

n: an asphalt-base enamel applied as a coating to pipe that is to be buried. The asphalt is combined with finely ground mica, clay, soapstone, or talc and applied while hot. Combined with a subsequent wrapping, this coating protects the buried pipe from corrosion.