A metallurgical analysis for the pipework was performed, which included compositional and microstructural analysis, as well as hardness measurements across the welded regions of the pipework. Jet impingement tests were conducted, simulating field conditions in order to quantify the degradation rate. Experimental results were compared with field data to assist in determining the degradation mechanism. The effect of the corrosion inhibitors used on the pipework was also examined and degradation mechanisms were discussed based upon results obtained from micro-structural studies.