The coke drum is the core equipment of the delayed coking unit in the refining industry. It converts low-value inferior oil into high-value gasoline and middle distillate, which has enormous economic benefits. Due to the process characteristics of delayed coking, the coke drum is continuously subjected to heating and cooling cycles, usually within 28 to 48 hours. It needs to be cyclically changed from room temperature to about 500℃, and the medium to which the container is subjected is from a gaseous state to a liquid state to a solid state, and the working environment is complicated and bad. So whether it is design, material selection or manufacturing, there are high requirements. With the further development of manufacturing technology and the shortening of cycle time, the manufacturing requirements of coke drums are getting higher and higher. It has developed from ordinary materials 20g, 20R, 15CrMoR to SA387 Gr11 Cl1, SA387 Gr11 Cl2 and other high temperature performance and impact toughness. Bainitic heat resistant steel. Due to the above-mentioned harsh working environment of the coke drum, and the shortening of the cycle period, the toughness requirement of the coke drum material is getting higher and higher, and even the low temperature impact toughness requirement is put forward.

Shandong Aoxin Petrochemical Equipment Engineering Co., Ltd. is a growth-oriented enterprise integrating design, manufacture and installation of petroleum, refining and chemical equipment, and integrating labor, business and trade. It is a member of China Chemical Equipment Association, Sinopec, China. Members of the petroleum material resources market have close cooperative relations with major domestic petrochemical engineering companies.

The company takes various specifications of towers, vessels, heat exchangers, reactors, separators, cracking furnace tubes and steel structures in petroleum and refining equipment as the leading products; it is good at coke towers and coking furnaces in delayed coking units. On-site welding of settling-regenerator and 1000-ton atmospheric and vacuum unit equipment in the cracking unit; also possesses proprietary technology for designing, manufacturing and installing CNC drilling and milling equipment and internationally leading patented floating disc technology. The footprints are all over the oil, refining, medicine, light industry and other industries in the north and south of the Yangtze River.