Suncenter tube expander(hydraulic tube expanding machine) is a special expansion equipment for boiler and heat exchanger manufacturing and maintenance. The device can reliably expand the heat exchange tubes of various specifications and materials, and is especially suitable for the expansion of thick tube sheets and large diameter tube heat exchangers. The heat exchanger produced by the rapid expansion machine expansion joint technology has uniform expansion, safety and reliability, long service life and low failure rate. Moreover, the expansion joint operation is simple, the expansion speed is faster, the manufacturing or maintenance time is greatly shortened, the production loss of the chemical plant is reduced, and the economic benefit is high.