The top lift installation of a 20,000 m3 gas holder for a PetroChina chemical project was successfully completed.

4 Month 1 Day, under the clear sky and scorching sun at the Laos-China Petrochemical Co., Ltd. project site in the Saysettha Industrial Park, Vientiane, Laos. The No. 1 Engineering Project Department, with the strong support of the company's technology center, successfully completed 20000m³ the top hoisting of the dry gas holder.

Safety technical briefing before hoisting

"All personnel ready, start lifting!" With the lifting instruction given by Liu Shijie, the company's chief technician from Yunling, the gas holder top began to slowly rise. Under the unified command and coordination of Li Huijun, the project commander, various professional technicians 1 through 12 an hour and a half of careful cooperation, successfully hoisted the top into place at noon.

Ready

The top slowly rises

20000m³ The dry gas holder top is in the shape of a tangential spherical surface, with a chord length of the steel frame of 33.866 meters, an arch height of 3.5m , and an installation height of 28.5 meters around. The height of the top in the middle is 32.00 meters, with a total weight of 68 tons. Due to its heavy weight, large diameter, and high height, and the need to strictly control the deformation of the top cover, the project department considered using a non-conventional hoisting process for hoisting. There are 18 H steel columns evenly distributed around the outer periphery of the side wall. After the overall fabrication at a height of +4m on the gas holder's foundation surface, the gas holder's own 18 H steel columns evenly distributed around the outer periphery of the side wall. After the overall fabrication at a height of steel columns, etc., were used to increase the strength 3m as hoisting columns. Sheaves were set up on the tops of 18 columns, and 18 lifting points were set on the edge of the top cover. Through 3 main lifting winches +1 ton winches were used for four-machine hoisting, using steel wire ropes of 3 meters and 2400 sheaves. Through an hour and a half of hoisting, the gas holder was successfully topped. 126 The top is in place

This hoisting operation, after meticulous and thorough special plan planning and preparation, expert review, and careful on-site preparation, was successfully completed. The gas holder top is the most technically challenging and the last major hoisting task of the Laos refinery project. The successful hoisting marks the entry of the Laos-China Petrochemical Co., Ltd. project into the final stage.

[No. 1 Engineering Department

Zhu Tinggang, Xu Kunlun] / }]