3 replies to this topic

[SMT]

Greetings all,

 

We are in the process of designing a cooling system that will send cooled air into a cooling chamber that will make direct contact with our product. 

 

Part of the cooling system is a heat exchanger; its internal components will be SS and some insulated copper tubing. The use of galvanized ducting that will run from the heat exchanger to the cooling chamber has been suggested.  

 

I prefer SS for all the reasons but waiting for SS ducting will delay the project by a few months. I haven't been able to find anything in the code to suggest galvanized metal is prohibited or discouraged as direct contact material other than for use in acidic food (which ours is not). 

 

Can anyone direct me to the appropriate section of FDA code that will allow its use for food contact if there is such a thing? or justification to prohibit it in same. 

 

Thanks in advance for feedback!

[Scampi]

The issue with galvanized is:

Not Recommended for Clean AirGalvanized piping is commonly used for water distribution and for general plumbing.  Galvanized coating resists moisture in compressed air but pieces of the coating will flake off and end up in your food.

 

So in essence, you will be adulterating your food and need to replace it anyway if you don't inspect it often

 

Here's the FDA link

 

https://www.accessda....cfm?fr=175.390

[SQFconsultant]

Surface coating of galvanized can easily powder or flake off - thus the reason it is never used in food facilities.

[SMT]

Thank you for the prompt and clear responses, your feedback is greatly appreciated!!