Anonymous
Vaporizing Process Flow from heat tracing can lead to localized corrosion. Jacketed heat tracing can reduce heat transfer to prevent this. There is a helpful jacketed heat tracing software that can be used to calculate temperatures, steam demand, and such at http://www.thermon.com/software/default.aspx.
I recently used two bare 1/2″ stainless heat tracers (at the 2 and 10 o’clock positions) on a pipe header insulated with 1.5″ Calcium Silicate as the jacketed heat tracing would not provide the temperatures that I was looking for.