Problems To Avoid And Solutions When Welding Stainless Steel Pipe Fittings And Pipelines

When connecting the stainless steel pipe elbow to the pipe, pay attention to the slag inclusion during welding. Slag inclusion means non-metallic slag inclusion. The main reason for this phenomenon is that the groove processing on the pipe or the stainless steel elbow product is incorrect, that is, the angle is too small. This is one reason. Another reason is that the current during welding is too small and the viscosity of the slag is too large. Due to the high viscosity, the slag cannot float to the surface, causing the slag inclusion phenomenon. Another reason is that the energy of the welding torch flame is not enough during gas welding. When welding stainless steel elbows and pipes, the workpiece cleaning work is not done well. The use of oxidizing flame, or the swing amplitude is too small and the slag is not pulled out in time, etc., all cause welding slag inclusion. After the skin on the electrode falls off in blocks, it is not fully melted. Multi-layer and multi-pass welds are also one of the reasons. If slag inclusion occurs during welding, it will cause water or air leakage during pressure test or use after welding. Therefore, it is necessary to avoid such phenomenon when welding stainless steel elbows.

After Stainless Steel Weld Elbow welding, post-weld treatment such as pickling and grinding is often required to remove the oxide layer (colored) and restore the corrosion resistance. A color chart is often used to determine whether the weld needs pickling according to the color level.