Get current pricing for National Annealing, National Annealing-11530-ID Qty (4) Each: 860 Gallon Stainless Steel(ss)high Pressure Vessels Rated 2500 Psi @ 650 Deg.f. 316ss Clad. Jacket Rated 115 Psi @ 670 F. . Product Category: Process Equipment, Sub Category: Process Tanks/kettles: