April 4, 2013 MACOGA delivers 18 units Double Hinged Expansion Joints A number of 18 Expansion Joints of DN400, Double Hinged have been delivered to a Thermoelectric Power Plant. These units have been hydraulically tested at 20 bar. Power Generation / Double Hinged / flecha-white-iz Created with Sketch. Previous Next flecha-white-dcha Created with Sketch.