Glass reactor with double wall DN60

...(internal diameter 60 mm).
This reactor with double wall made of borosilicate glass 3.3 (type DURAN, PYREX, etc.) is the result of a collaboration with a customer. He saw this prototype realised, after he had informed us about the manipulation and all the technical data (temperature and volume).
In the internal tube we have welded a glass plate, with a thickness of 5 mm and with wholes with a diameter of 3 mm.
The external tube with a lateral exit, allows the complete emptying of the internal tube.
A flat lid, made of a glass plate with a thickness of 5 mm, allows the limitation of the total height of the piece.