I do appreciate the comments and information that has been posted. I have been involved in a training class, so have not had time to respond before this. Thank you very much.
I have gotten conflicting opinions about the use and protection of long bolt style flanges in a chemical plant. One calls for the flange to be wrapped to prevent/decrease the amount of leakage in a fire situation. The other calls for leaving the flange open as the wrapping can cause corrosion...