Cross References: EN 2101 EN 2321 EN 2424 EN 3042 EN 4236 EN XXXX:Aerospace series. Circular pipes for 5086 Aluminium alloy (A. G4MC) Hydraulic systems. Metric series. Final condition H111(2) ISO 12 ISO 468 ISO 2944 ISO/TR 2685 ISO 2859 ISO 6773 ISO 7137