What harm does the excessive weld height of API 5L Gr.B PSL1 welded pipe bring

With the rapid development of continuous rolling of high quality steel strip, the progress of welding and inspection technology, the continuous improvement of welding quality, the application of API 5L Gr.B PSL1 welded pipe is increasing. In the production process of API 5L Gr.B PSL1 welded steel pipe, the weld height is a very important detail. There are a lot of hazards in the excessive weld height of API 5L Gr.B PSL1 welded pipe.

The stress concentration of the butt joint is mainly caused by the weld height of API 5L Gr.B PSL1 welded pipe. The stress at the weld toe of the butt joint is the largest. The larger the weld height is, the more serious the stress concentration is, and the strength of the welded joint will decrease. After welding, the cutting height is higher than that of the base metal, so that the stress concentration can be reduced.

The large and high inner weld seam increase energy loss of the conveying medium. If the inner surface of the submerged API 5L Gr.B PSL1 welded pipe is not done anticorrosion treatment, the remaining size of the inner welding is large, and the friction resistance of the conveying medium is great, thus the energy consumption of the pipeline will be increased.