大容量电站锅炉锅筒压制焊接变形

Study on welding deformation of pressed steam drum for utility boiler

通过对 30 0～ 6 0 0MW电站锅炉锅筒压制筒体焊接变形的研究 ,找到了筒体的环形端面在纵缝焊接后的椭圆形变形规律和变形量的经验数据 ,制订和实施了保证筒体圆度和环缝错边量的制造工艺 。

Study on welding deformation of pressed cylindrical shell of steam drum for 300～600MW utility boiler is presented. Empirical data of elliptic deformation regularity and deformation rate for annular end faces of a single section of pressed cylindrical shell has been found after the longitudinal seam welding of the shell being complete. A complete of perfect measure for manufacturing process is taken and put into effect to satisfy the requirement of miss-match of welding joints and the requirement of relevant code and specification. As a result, the manufacturing quality of the drum is improved.