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How to prevent warping at the end of 16mn thick-walled welded pipe?

The 16mn thick-walled welded pipe has high precision, and it is also a pipe fitting that has been cold drawn or hot rolled according to the requirements. It is a welded pipe with a complicated production process. In the whole process of using 16mn thick-walled welded pipe, some problems will inevitably occur, so how should we deal with such problems?
 
When grinding and polishing the surface weld of the embedded section of the 16mn thick-walled welded pipe, the welding misalignment of the pipe end is not sharpened or the sharpening is uneven. , When the 16mn thick-walled welded pipe is piled up outdoors for a long time, the metal material on the welded surface will be eroded first, which will cause the 16mn thick-walled welded pipe to be warped.

Method for preventing edge warping at the end of 16mn thick-walled welded pipe
 
1) Under the condition of not affecting the welding of branch pipes, the pre-embedded length of the anti-rust coating on the top of the surface should be increased as much as possible, which can prevent the 3pE anti-corrosion warping caused by the long accumulation time of the welded pipe and the serious electrochemical corrosion of the pipe end;
 
2) When the 16mn thick-walled welded pipe is piled up outdoors for a long time, the pipe end should be covered to avoid precipitation corrosion, resulting in serious corrosion of the pipe end;
 
3) If the construction period of the pipeline site is long, the weldable anti-corrosion paint can be brushed on the exposed part of the metal material at the end of the pipe to avoid the edge warping caused by the corrosion of the 16mn thick-walled welded pipe during the storage period;
 
4) Strictly control the sharpening quality of the welding misalignment at the embedded part of the pipe end. Outside the weld on the surface of the weld, the same as other positions on the pipe body, brushing the anti-rust paint will prolong the storage time, so as to avoid the bottom end of the anti-rust paint at the welding place being eroded first and causing the 16mn thick-walled welded pipe to warp.

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