3-) Qualification of Welders; Repair is to be performed by class approved qualified welders. 4-) Filling Material; Welding consumables are to be dried adequately prior to welding in accordance with manufacturer's recommandation.Proper filling consumables will be used according to bewelded steel metal. Necessary welding precautions should be taken in accordance with to avoid any cracks, defects etc.5-) Preheating; Applied between 110 and 120 degrees. 6-) WPS; Class approved WPS will be followed during welding. Please find attachment.7-) The welding surfaces are cleaned by grinding / brushing after completion of welding process. 8-) Inspection by NDT Methods at the end:Based on class requirements necessary NDT operations will be carried outat the end of job. If any problem is detected, instruction will be repeated.