Manufacturing at the glassblowing lathe of a double walled reactor DN200

Manufacturing of a reactor made of borosilicate glass 3.3 (type DURAN, PYREX, etc.) of DN200 (internal diameter of 200 mm) according to the sketch of a customer.
For this manipulation, because of its volume, its weight and its heating degree, the piece has to be manufactured at the glassblowing lathe.