On the afternoon of September 13th, the fractionator (position no. : c-202) with the largest diameter attached tower pipeline (DN750) was successfully placed in the hydrocracking unit of the DCC project in Russia. The fractionation tower is the largest and highest tower in hydrocracking unit, and the successful hoisting of the pipeline with the largest diameter attached to the tower laid a solid foundation for the perfect completion of the "hundred days meeting", and created good conditions for the subsequent professional construction and project completion on schedule.