Stainless Steel Pipefitting Transportation and Machining

This technical article introduces some knowledge of the transportation and machining of stainless steel pipefitting.

1. When transport stainless steel pipefitting, it cannot be contacted with other metal, which needs plank or rubber plate.

 

2. Stainless steel pipe fitting arc starting and stopping adopt back weld method. Arc stopping should fill arc crater and arc starting must be done within the groove. Forbid arc in the pipeline, pipe parent metal surface and striking. If there are hole, crack and other defects at the arc starting and stopping point, it should be processed in a timely manner.

 

3. The starting and stopping of multichannel and multi-layer welded pipefitting should be staggered.

 

4. The connection between stainless steel pipe and pipefitting and other material pipefitting needs argon filling to protect and then proceed argon tungsten-arc welding.

 

5. During continuous welding, its interlayer temperature should not exceed 60℃.

 

6. Positioned welding needs argon protection inside the welding line.

 

7. Ordinary grinding wheel piece is not allowed to cut this kind of pipefitting, and it should be cut by special grinding wheel or plasma.

 

8. Welding line needs acid pickling and passivating treatment.

 

9. Stainless steel pipe hydraulic test has requirements for water temperature and its quality, which should not lower than 5℃ and chlorine ion content should not exceed 25Pmm.