For any heat exchanger design (pres 2

[mthausif123]

For any heat exchanger design (pressure < 50 barg) I consider tube thickness of 2.11 mm for CS and 1.65 mm for SS. As per my understanding 2.11 - 1.65 = 0.46 mm is extra thickness for CS as corrosion allowance. Is my understanding correct?

 

[LittleInch]

The strength of the material has an impact as well....

CS is a very vague description.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[mthausif123]

CS stands for Carbon steel. Sorry for not mentioning clearly.

 

[LittleInch]

I know what is stands for, but there are many many different types and strengths which may account for any difference in thickness.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[Christine74]

It's a pretty standard practice to specify 14 BWG min wall for carbon steel tubes and 16 BWG avg wall for most grades of stainless steel tubes, even when thinner tubes would meet all of the mechanical design requirements. However, it's not common at all to assign a Corrosion Allowance to the tubes themselves. In other words carbon steel tubes are typically supplied with excess thickness to help protect against corrosion, but they are not typically assigned a Corrosion Allowance.


-Christine

 

[mthausif123]

Thank you, Christine and Littleinch, for helping me out.