100*200 flat elliptical welded pipe, custom made 100*160 flat elliptical steel    - For this larger-sized flat elliptical tube, submerged arc welding is a good choice.

Submerged arc welding offers fast welding speed, high weld quality, and deep penetration, meeting the strength requirements for large-diameter flat elliptical pipe welding.

Before welding, the welding groove must be prepared to ensure that the groove angle and chamfer dimensions meet the welding process requirements, thereby guaranteeing the quality of the weld and the smooth progress of the welding operation. - **Forming Process**: When manufacturing flat elliptical steel pipes, the forming process is crucial. The rolling forming method can be used, which involves gradually rolling the steel plate into a flat elliptical shape through a series of rolls with specific shapes.

During this process, it is essential to control the spacing, angle, and rotational speed of the rolling rolls to ensure that the dimensions and ellipticity of the flat elliptical steel pipes meet the requirements.

For flat oval tubes with dimensions of 100*200 and 100*160, multiple passes through the roller may be required to achieve the desired shape.。