动力厂不锈钢污水处理罐罐底边缘板对接焊缝未熔合原因分析及返修

Cause Analysis and Repair of the Non-fusion of the Butt Weld of the Bottom Edge Plate of Stainless Steel Sewage Treatment Tank in the Power Plant

某公司动力厂3000立方不锈钢立式圆筒形污水处理罐,罐底板设计时采用了带垫板的对接焊缝。焊后边缘板对接焊缝外侧300mm出现了未熔合缺陷,通过分析未熔合缺陷产生原因及制定返修措施,焊接一次性成功,检测未发现不允许的缺陷。保证了不锈钢污水处理罐的顺利投用和之后的安全运行。

The 3000 cubic stainless steel vertical cylindrical sewage treatment tank of a company's power plant was designed with butt welds with backing plates.After welding,a non-fusion defect appeared on the outer side 300mm of the butt weld of the edge plate.By analyzing the cause of the non-fusion defect and formulating repair measures,the welding was successful at one time,and the detection did not find any impermissible defects,ensuring the smooth operation of the stainless steel sewage treatment tank and safe operation afterwards.