Vacuum Is not described from the stress classification with the piping, but by the power with the liner supported because of the housing to resist vacuum collapse. It is the most often disregarded element of the procedure and As a result by far the most popular supply of failure. Modifications https://www.quora.com/profile/Jacques-Donaldson-2/Safety-Practices-for-Glass-Lined-Reactors-Glass-lined-reactors-are-essential-in-chemical-and-pharmaceutical-industries