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Experimental Research on the Wear Characteristics of Heat Transfer Tubes in Dusty Gas Flows

Results of an experimental invstigestigation on the wear characteristics of three types of heat transfer tubes, i.e., the ordinary steel tube (O T), the helically finned steel tube (HF T) and the helically finned steel tube with special nickel infiltration layers (HF T NL), are reported. Mass losses due to abrading and abraded regions on the surface of the tubes are carefully measured and analyzed, and the abrading characteristics of the tubes are compared to each other. It is showed that the high hardness and the high resistance to oxidization of the nickel infiltration layer on the HF T NL tube contribute to, and result in, a higher abrading resistance of the HF T NL tube than the other two types of the tube. Utilization of the HF T NL tube may considerably improve the working life of heat transfer equipments operated in dusty gas flows of high temperature. Figs 6, table 4 and refs 9.