Used Gaston County 500 gallon 316 stainless steel reactor. Internal rated 55/FV@ 350 degrees F. Carbon Steel conventional jacket rated 45 @ 350 degrees F. NB# 17857, Head thickness .375/.437, Shell thickness .375, S/N F71611-186-1. Top fittings: 12" X 16" oval manway, (3) 2" NPT, (2) 1" NPT, (2) 4" flanged, (1) 4" sightglass, 2" center bottom drain.