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International Research Journal of Engineering and Technology
Premature failure of the multistage descaling pump impeller of hot strip mill (HSM) has been investigated. The multistage centrifugal pumps are used in hot strip mill for a large variety of applications, such as roll cooling, strip cooling at run-out table and de-scaling. The impeller is a single piece casting of martensitic stainless steel. The impeller rotates at 4800 rpm with a volumetric flow of 400 m 3 /hr of flue water with a discharge pressure of 185-210 bar. The premature failedfatcat:z2x2iad4kjd57nxsxpnsvwkdcu