A METHOD OF WELD SEQUENCING TO CONTROL DISTORTION IN WELDING OF BURNER PANELS OF HIGH PRESSURE, HIGH TEMPERATURE STEAM GENERATOR OF POWER PLANT

摘要

According to the invention, a method of weld sequencing for welding the burner panel (P) used in high pressure, high temperature steam generator, is disclosed. The welds available in in the panel are classified as vertical welds (7), horizontal welds (5) and inclined welds (6) depending on their configuration. The vertical welds (7) available in the top side of the burner panel (P) are completed first using eight welders (four welders on side A and four welders on side B) with each of the welder welding 1/4th the length of the burner panel (P) at identified locations proceeding from the center (C) towards both the right (R2) and left (L2) extremities of the panel simultaneously. Then panel (P) is then turned upside down and all the welds namely vertical (7), horizontal (5) and inclined (6) welds are completed in this position in the said order. Then the panel is again turned and the remaining welds namely horizontal and inclined welds are completed.