-)If no cracks are observed, the surface to be welded will be preheated until between 110 – 120 0Caccording to the procedure attached (WPS 340). 5-)Use SMAW (Shielded Metal Arc Welding) welding method.The electrode use related series.6-)After the first pass welding, a crack test (PT) will be done again to make sure there is no crack on the surface.7-)Interpass temperature is less than 250℃. 8-)After the cap pass welding, the surface to grinding smooth. Crack test (PT) will be done again.9-) Finally, post-weld heat treatment (PWHT) will be done after welding