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How to Ensure the Quality of ERW Welded Pipe in Production?

Date:2022-06-14    keywords: erw welded pipe
How to reduce the wear of ERW welded pipes in production and ensure the quality of welded pipes?

From the analysis data of ERW welded pipe scrap, it can be seen that the roll adjustment process plays a very important role in the production of welded pipes. That is to say, in the production process, if the rolls are damaged or severely worn, part of the rolls should be replaced in time in the unit, or a certain type of welded pipe should be continuously and fully produced, and the entire set of rolls should be replaced.

When replacing the welded steel pipe, it is necessary to adjust the rollers accordingly to ensure the quality of the welded pipe. On the contrary, if the rolls are not adjusted properly, it is likely to cause defects such as twisting, lap welding, edge fluctuations, indentations, scratches and even large ovality on the surface of the welded pipe and the pipe body.

ERW welded pipe

The following introduces the operation method of adjusting the roll that should be mastered when changing the roll.

In general, ERW pipe specifications should be changed and the complete set of rolls replaced. The steps of adjusting the roller type are: first, pull the steel wire at the inlet and outlet of the unit out of the center line and adjust it so that the hole pattern of each frame is on the center line, and weld the steel pipe manufacturer to make the forming line meet the technical requirements.

In order to ensure the welding quality of ERW welded pipe, the forming roll, guide roll, extrusion roll and sizing roll need to be adjusted once after replacing the rolls as required, and then focus on adjusting the closed-cell type, guide roll and extrusion roll. The function of the guide roller is to control the welding seam direction and bottom line height of the welded pipe, reduce the edge extension, control the rebound of the edge of the tube blank, and ensure that the welding seam entering the extrusion roller is straight and free from distortion.

In short, in the process of ERW welded pipe welding, when the welding machine is running at a slow speed, the welded pipe workers must pay close attention to the rotation of the rollers in various parts of the welded pipe, and adjust the rollers at any time to ensure that the welding quality and process dimensions of the welded pipe meet the specifications.

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