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Iran Penetration Grade Bitumen made by chosen crude oils via fractional distillation process. It heated to 300-350 C. Through vaporization, fed to distillation column allowing separate lightest fractions of crude, from heavier fractions, which remain liquid.
Penetration Grade Bitumen, is classified by influence trait. This grading’s basic assumption is that less viscous asphalt, deeper the needle will penetrate. Bitumen which is made during oxidation process of vacuum bottom. Bitumen production feed-stock that derives from distillation tower residue in vacuum oil refineries. At bitumen production unit in a manner that its penetration point.
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