This standard specifies the characteristics of straight unions for inch series pipe couplings, 37°, spherical, in heat resisting steel, for aerospace applications. Connect with fluid system component with port connection in accordance with preN 4550-3. Nominal pressure: Class D in accordance with ISO 6771
DS/EN 4554:2003 history
2003DS/EN 4554:2003 Aerospace series - Pipe coupling 37°, spherical, in heat resisting steel - Straight unions, threaded - Inch series