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As of the morning of April 23, the gas-tight test for the depropanizer and propylene towers of Anqing Petrochemical’s 300,000-ton-per-year I gas fractionation unit has reached 1.9 megapascals, while the deethanizer tower has successfully achieved 2.5 megapascals. If everything continues smoothly, the airtight tests for all three key towers are expected to conclude by April 24. This marks a critical milestone, as the start-up process of the facility is now entering its most crucial phase.
With the completion of the renovation project in the remote area and the successful handover of the new 300,000-ton-per-year gas fractionation unit, the Refining Department now faces the dual challenge of ensuring safety across existing units and managing the startup of the new plant. Due to the ongoing operations of the old I gas fractionation unit and the simultaneous commissioning of the new one, there has been a significant shortage of personnel in the gas separation unit. To address this, the Refining Team emphasized teamwork and collaboration, mobilizing experienced staff from other departments such as catalysis, decompression, and cracking. They even utilized available manpower to support the startup efforts of the gas separation plant.
After the new gas separation plant was handed over, the team immediately began flushing the system with water to remove debris and clear the piping. Starting on April 21, the air distribution unit entered the airtight testing phase. Staff worked around the clock, gradually increasing pressure according to operational guidelines to check the integrity of valves, manholes, and welds, and quickly addressing any leaks or issues. Wang Yiting, a senior technician from the catalytic unit, was on vacation but voluntarily returned to assist with the gas-tight tests once he learned about the urgent need for support.
During the airtight testing, some flanges were located at low positions, making the inspection challenging. Workers had to crouch down, change angles frequently, and conduct thorough checks. For high-positioned flanges, technicians coordinated with scaffolding teams to ensure safe access and meticulous work. Over several consecutive days, workers reported any leaks to the equipment technicians, who then addressed them promptly. After each fix, re-inspections were carried out to ensure the system was ready for the official start-up of the new gas separation plant. The collective effort and dedication of the team have significantly contributed to the success of this critical phase.