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This large superheater weighs more than 230 tons, with a total length of 27 meters and a diameter of 3.8 meters. Among them, the deep hole butt welding and deep hole lap welding used for 2,830 heat exchange tubes and tube plate welding are world advanced welding techniques. Qilu Machinery Co., Ltd., which once successfully manufactured the first and second dehydrogenation reactors for Qilu petrochemical ethylene plants and mastered the new welding technology, has successfully become the preferred partner of Litz company. By October 17th, the deep-hole butt welding of 2,830 tubes and tube sheets had been completed. After passing the coloring and gas-tight test, the welding pass rate reached 100%. In addition, more than 2,300 lap welds have been completed for 2830 pipe and tube plates.
Qilu Petrochemical Machinery Manufacturing Co., Ltd. manufactured a large superheater of Jiangsu Lishi De Company, which has already completed more than 80% of its workload and entered the final stage.