Does the dairy and/or food industry (specifically but not limited to the USA)considers to replace their stainless steel SS 316 or SS 304 pipes after say 30 years or so? Could someone please share their experience or opinion. I have this question because I wanted to know if the cleaning in place procedures stand ineffective after say 30 years because the metal's surface roughness, hydrophobicity, corrosion resistance would change. If you have an idea about any beverage industry besides dairy or even meat industry, please let me know. It will be very helpful. Thank you in advance.
Stainless does not "wear out" or deteriorate in general food service , so no replacement. There may be some unusual service that causes corrosion . If that occurs I expect a more corrosion resistant alloy replacement is quickly installed. Keep in mind if there is corrosion ,there are traces of Cr, Ni, Mo going into the food . That would bring lawsuits regardless of any harm. It is hard to imagine any surface texture change ;possible exception of raw foods with entrained sand which might cause polishing of the stainless.