We have found that Cooling Water welding root pass is substandard. The welders employed by PM so far, especially the GTAW welders are not capable to produce good welding. We are still finding root undercut, root concavity , excess penetration & porosity on the root pass. Even though RT passed welders, no one is able to provide a visually good root welding at site so far. The GTAW welding, which is the most important, still remains on the poor quality side.