The Preform Soaking Oven System is designed for ASI/Silica Machinery, LLC. This system is used to heat glass preforms after they have been sintered enabling excess gas still trapped in the preform after sintering to escape. The ovens consist of 3 cylindrical units for core soaking and 5 cylindrical units for clad soaking. The housing is a stainless steel cylinder. The outer surface of the preform is protected from contamination. Preform loading and unloading is automated, and each oven can be loaded and unloaded independent of other ovens.