This European Standard specifies the characteristics of port connection for pipe couplings ,60°,spherical,intitaninum alloy,for aerospace applications.It is applicable to 60° spherical tube coupling in titanium alloy defined by the EN 3853 standard ,to be mounted with O-ring defined in accordance with TR 4052.
EN 4051:2002 history
2002EN 4051:2002 Aerospace series - Pipe couplings, 60°, spherical, in titanium alloy - Port connection