When many of the hangers are installed, position the insulation in excess of the hangers by sliding it onto the hooks or prongs. Mini-Cupped Weld Pins: These insulation pins actually weld on the sheet metal duct and the head with the pin retains the insulation set up. A pin welder https://insulationhanger61694.angelinsblog.com/29499246/fascination-about-insulation-hangers