We just checked the fit-up of the non-sliding flange at both AH drums.Keeping in mind the flatness deviation of the flanges, 4mm shortness of the drums and probable 1-2mm shrink during welding, it seems best to adjust to fit-up, to create a bigger welding gap then actual situation. A bigger welding gap is covered by the WPS for this FP weld.By acting now, we can avoid ending up with additional machining of the flange thickness in next steps and avoid the risk of a (too) thin flange.Looking forward to your feedback.