This standard specifies the characteristics for adaptors with reduced pipe end, with lockring,for pipe couplings 8"30,in titanlum alloy, for installing in a boss,foraerospace applications.
EN 3248:2001 history
2001EN 3248:2001 Aerospace series - Pipe coupling 8° 30′ in titanium alloy - Adaptors, reduced pipe end, with lockring