1. In order to prevent the corrosion between the eyes caused by the heating of the flange cover, the welding current should not be too large, 20% less than carbon steel electrode, the arc should not be too long, the interlayer is quick cold, and the narrow welding pass is suitable.
2. The electrode should be kept dry when used, the titanium calcium type should be dried at 150 °C for 1 hour, and the low a hydrogen type should be dried at 200-250 °C for 1 hour (no repeated drying, otherwise the coating will crack and peel easily) to prevent the electrode coating from sticking to oil and other dirty materials, so as not to increase the carbon content of the weld and affect the quality of the welding parts.
3. When stainless steel flange pipe is welded, carbides are precipitated by repeated heating, which reduces the corrosion resistance and mechanical properties.
