I am currently preparing a HACCP Plan for a company that blends vegetable oils. We are using the CODEX Decision Tree to determine the CCPs.
They use stainless steel filters to filter the oil during blending and before filling. However, at the end of the filling line, just before the fill heads, they have a 73 micron filter. Will this size filter be enough to prevent metal fines from any damaged stainless steel filter from entering the finished product? They do not have a metal detector installed - only a magnet that does not detect stainless steel.
I believe that the 73 micron filter will be enough to capture most metal fragments, but I am uncertain whether 'powder-size' metal particles would pass through the 73 micron filter.