Elliptical Head 2:1 A516 Gr 70 (N) Pressure Equipment according to EC-Directive: 87/404/EWG,97/23/EC,99/36/ Elliptical Head 2:1 A516 Gr70 (N)ellipsoidal headPressure Equipment according to EC-Directive:87/404/EWG,97/23/EC,99/36/orWelding procedure, according to ASME IXExecution standard as per ASME VIII Division 1 UG-81 ellipsoidal Head 2:1 87/404/EWG,97/23/EC,99/36/