Welding procedure research of R60702 zirconium pressure vessels

In order to improve efficiency and reduce costs, the new PAW plus GTAW method for R60702 zirconium plates used in acetic acid production unit is analyzed. The microstructure and mechanical properties are tested by PAW procedure. Through the test analysis and the measured data in the practical application, the butt joint welded by the PAW procedure can satisfy the standard requirements of mechanical properties, corrosion resistance. The success of the welding procedure qualification shows that the new PAW plus GTAW method has great advantages over the traditional GTAW method. (paper)