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The Production Environment of Stainless Steel Welded Pipe

Date:2017-06-29    keywords: stainless steel welded pipe, welded pipe production
The production quality of stainless steel welded pipe is affected by many factors, including the environmental factors of the production site, stainless steel welded pipe manufacturers in the product quality control can not be ignored when the impact of this part. Here to talk about stainless steel welded pipe production environment control requirements:

1. Stainless steel welded pipe production need to have an independent production workshop or special fixed production site, stainless steel raw materials to ensure that a separate storage, can not be mixed with carbon steel.
2. Stainless steel welded pipe raw materials and semi-finished products in the process of turnover and transportation, should be equipped with the necessary anti-ferrous ion pollution and knock injury, scratched transport tooling.
3. Stainless steel welded pipe welding site is not allowed to wear a wind, to avoid the wind, rain, snow direct impact, the temperature is not less than -5 ℃.

4. stainless steel welded wire used in welding wire must have a dedicated welding material library to ensure that its storage temperature of not less than 18 ° C, humidity is not greater than 60%.


stainless steel welded pipe


Key details of stainless steel welded pipe production


1. Raw material control: Strictly check the composition, thickness tolerance and surface quality of the stainless steel strip to avoid defects such as inclusions and cracks, and ensure that the material meets the corresponding standards (such as 304, 316).


2. Forming process accuracy: Control the gap between the roller molds during coil forming to ensure the roundness and straightness of the tube diameter and prevent elliptical deformation; adjust the position of the guide wheel to ensure stable feeding of the steel strip and reduce misalignment.


3. Optimize welding parameters: Select welding methods (such as TIG, MIG or high-frequency welding) according to wall thickness, accurately adjust current, voltage and welding speed to avoid incomplete welding, weld nodules or burn-through, and ensure uniform and smooth welds.


4. Weld seam treatment: Clean the surface welding slag and oxide scale in time after welding, and use grinding, pickling or polishing to eliminate the weld excess height to improve the surface finish and corrosion resistance.


5. Online inspection: Use eddy current testing, water pressure testing and other means to inspect the sealing and internal defects of each weld and eliminate unqualified products; measure the pipe diameter and wall thickness to ensure that the dimensional tolerance meets the requirements.


6. Post-processing specifications: The finished product is subjected to solution annealing to eliminate welding stress; passivation treatment is performed to enhance corrosion resistance, and contact with carbon steel is avoided during storage to prevent iron ion contamination.

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