焦炭塔是炼油工业中延迟焦化装置的核心设备，它把价值低的劣质油转化为价值高的汽油和中馏分油，产生巨大的经济效益。由于延迟焦化的工艺特点使焦炭塔不断经历升温、降温循环，通常在28～48h内．需要在室温至约500℃之间循环变化，同时容器承受的介质由气态到液态至固态，工作环境复杂、恶劣。所以无论是设计、选材还是制造都有着很高的要求。随着制造技术的进一步发展和循环周期的缩短，对焦炭塔的制造要求越来越高，已经从普通材质20g、20R、15CrMoR 发展为SA387 Gr11 Cl1、SA387 Gr11 Cl2 等高温性能和冲击韧性更 加优越的贝氏体耐热钢。由于焦炭塔的上述恶劣工作环境，加之循环周期的缩短对焦炭塔材料的韧性要求越来越高，甚至提出了低温冲击韧性要求。
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.
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