Used 600 gallon 316L SS reactor, 100 PSI, Watson Metal Masters

Used 600 gallon 316L stainless steel reactor, manufacturer is Watson Metal Masters. Internal rated 80 psi at -20 to 300 fahrenheit, 316L jacket rated 100 psi at -20 to 300 fahrenheit. Reactor is mounted on stainless steel legs. Dimensions are 52.25" diameter x 58". #47SL149

A lot more stainless steel reactors are available for sale, ranging from 6000 gallon - 5 gallon sized tanks.

Watson #47SL149 capacity & specifications

Capacity (Gallons): 600
Diameter: 52.25
Straight side: 58
Internal pressure: 80
Jacket pressure: 100
Manway: 16". Top nozzles: 2" & 6". Center bottom outlet: 2".
National board #75
Built in 2000
Stock #47SL149