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What is the purpose of bright annealing for stainless steel heat exchange tubes?

2019-05-05View Original

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Our unit has a heat exchanger of the fixed-tube-sheet type. The material of the heat exchange tubes is S30408, with a diameter of Φ25×2; the fluid flowing through the tube side is propylene + propane; The shell-side fluid is process water, requiring the heat exchange tubes to undergo bright annealing. 1) Why is it necessary to perform bright annealing on the heat exchange tubes, and what is the purpose of this? 2) What will be the consequences if bright annealing is not used? 3) Can ordinary pipes be subjected to bright annealing? What’s the cost?

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