Selection of heat exchanger materials
Thread Content
A heat exchanger: the fluid flowing in the shell side is SO2 gas, with a working pressure of 0.15 MPa; the inlet temperature is 318°C and the outlet temperature is 425°C. The fluid flowing in the tube side is SO3, with a working pressure of 0.17 MPa, an inlet temperature of 527°C, and an outlet temperature of 422°C. Questions: 1. How should the material for the shell be selected? 2. How to select the tube box material, tube sheet material, and heat exchange material? I’m in a hurry; I hope everyone can offer some advice
The pressure is not high; Q245R and 20II are suitable
Consider high-temperature materials; the Q245R used upstairs cannot meet your temperature requirements
Cr-Mo steel could be considered
Does carbon steel not corrode? The one that comes to an end should be chosen
Carbon steel definitely won’t work. First of all, SO2 is corrosive, so a material that is resistant to corrosion is necessary. At temperatures over 500 degrees, a material that can withstand high temperatures is also required
In the case of pure dry SO2, carbon steel is suitable for this temperature. If moisture is present, it is recommended to use high-alloy stainless steel.
It is recommended to use stainless steel; S30408 should work fine