Precautions for construction of stainless steel welded pipe for engineering

1. The welder must hold the certificate and be qualified to work after being approved by ABS. The welding work should be consistent with the welder qualification approval project. During the welding construction process, the assembly condition of the pipe, the quality of the tack welding and surface cleaning, whether the use of the welding consumables meets the specified requirements, and whether the performance indexes and instruments of the welding equipment are in good working condition must be carefully checked.

2. Stainless steel welding rods should be baked as required, then stored in a 120 ° C incubator, and used as needed. After the electrode is removed, it should be placed in the incubator to avoid moisture.

3. When the welder is on duty, the welding process requirements should be clarified, check whether the welding consumables are consistent with the process requirements, and avoid mistakes.

4. The welder should check the shape of the kerf and the surrounding cleaning before construction. If it does not meet the requirements, it should be processed.

5. The inflator should be connected first in the welded stainless steel tube and inflated according to the “argon filling method”.

6. Welding operations should be carried out under the conditions of wind and weather protection.

7. Adjust the flow rate of the shielding gas before welding, and exclude the air in the gas delivery pipe and the pipe to be welded for 1-2 minutes. The inlet for argon gas is arranged at the lower end of the pipe, and the pressure difference between the inlet and outlet is maintained at 0.02Mpa~0.05Mpa.