Surface Finish Stainless Steel 2

[29124309]

I have to submitt specifications for an stainless steel process vessel in reference to the interior and exterior surface finish. My confusion is that surface finish #1 to #7 and also I have being reading about the Ra units, what is the difference and if there is a rule of thumb for process vessels surface finish codes, thanks

Roque

 

[metengr]

Look at this thread
thread330-24326

The links are outdated but the content of the posts will help you.

The surface finish requirements for a process vessel depends entirely on the application. Food handling versus pharmaceutical process versus industrial process fluids.

For general information on finished for stainless steels find the publication below;

SSINA (Specialty Steel Industry for North America) "Finishes for Stainless Steel"

http://www.ssina.com/publications/index.htm