This standard BS EN 4808:2017 Aerospace series. Flange couplings. Weld coupling, 90° elbow, in nickel alloy. Inch series is classified in these ICS categories:
49.080 Aerospace fluid systems and components
This standard specifies the characteristics of straight welded coupling in nickel alloy for swivel flange couplings for inch series aerospace applications. Nominal pressure: The parts shall withstand nominal pressures given in Table 1. The nominal pressure of the assembly depends on associated seal, tube material characteristics, tube diameter and tube wall thickness (see EN 4814). NOTE Assembly in accordance with TR 4815.
