Heavy-duty free-stand enclosure made of stainless steel for flange-mount disconnects. Manufactured from 12 gauge type 304 stainless steel. Seams continuously welded and ground smooth. Body stiffeners in larger enclosures for extra rigidity. Body flange trough collar excludes liquids and contaminants. Heavy-duty lifting eyes anchor into reinforced top. Removable centerposts permit easy panel installation. Heavy-gauge continuous hinges. Heavy-duty 3-point latching mechanism operated by type 316L stainless steel POWERGLIDE™ padlocking handle on all doors. Ends of latch rods have rollers for easier door closing. Panel supports. Data pocket is high-impact thermoplastic. Seamless foam-in-place gasket provides oil-tight and dust-tight seal against contaminants. Removable 10 gauge steel panels mount on collar studs. Master door is far right-hand door on all enclosures. Type 316 stainless steel handle with defeater on master door. Type 316 stainless steel handle (non-defeater) on slave door. Mechanical interlock activated by master door prevents slave doors from being opened first. Doors can be closed in any order.