Assume two pieces of small diameter (1.25"NPS) pipe are welded together with a full penetration girth buttweld and end preparations conform to ASME B16.25. After the weld is completed, what are some suggested considerations if the two pieces are "kinked", axial centerlines have an angular offset a few to several degrees. Typically B31.3 permits an internal diameter misalignment of less than 1/16", and miter bends doesn't require consideration for angular offsets less than 3 degrees. I assume small variations are acceptable, but when is the weld unacceptable 1, 3, 5, 10, 20 degrees..etc. What SIF's should be considered if trying to justify acceptance, since a kink will likely reduce fatigue life?

Any standard practices, opinions, and references to SIF's on "kinks" via experiment or analytical techniques would be greatly appreciated.

Thanks