DIN EN 4554-2004 航空航天系列.耐热钢制37?球面管子接头.加螺纹直活管节.英制系列
Aerospace series - Pipe coupling 37°, spherical, in heat resisting steel - Straight unions, threaded - Inch series; German and English version EN 4554:2003
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 EN 4550-3 Nominal pressure: Class D in accordance with ISO 6771