Weld repair is used widely in many industrial applications. Knowledge of the through thickness residual stress distribution is of particular importance for accurate assessment of the structural integrity of repaired components. However, the distribution and magnitude of residual stress after weld repair is not well characterised. In this paper, results from a programme of residual stress measurements on a butt-welded stainless steel pipe, with 35mm wall thickness and an outside diameter of 432 mm are presented. Measurements of the in-plane components of residual stress through the wall thickness were obtained using the novel deep-hole technique. This technique relies on measurements of the distortion of a reference hole drilled through the wall thickness of the component. Residual stresses were measured in the heat affected zone (haz) of the butt-weid, prior to and after introduction of weld repairs of different depths. it is shown that the introduction of repairs significantly changed the original as-welded residual stress-state. Finite element (fe) residual stress simulations for the original girth weld and a deep repair are described. The measured results show good agreement with predictions both prior to and after weld repair.