No mate it was due to contamination. I proved it with an L8 Orthogonal Array, testing 8 factors at once, That was after every expert from the welding industry had tried, and failed to solve the issue, This was on an automated line with 4 weld units stations and a pressure test unit as a final test. The first process was bending the tubing, All parts were the processed through an automated wash plant, This is where the problem was caused. When the Tulip was swaged onto the pipe all three surfaces had to be completely clean of any oil or residue (The outside of the pipe and both the inner and