1. Tube billet heating: the heating should be uniform, and the temperature should not be raised or lowered rapidly. Each temperature rise and fall should be kept steady and slow, and the maximum temperature rise and fall should not exceed 30°C.2. Centering roller: Make sure that the installation of

The purpose of steel pipe pile construction is to transfer the load of the superstructure to the deep soil layer with a strong bearing capacity or to compact the weak soil layer to improve the bearing capacity and compactness of the foundation soil. Therefore, it is necessary to ensure that the stee

1. Downhill forming method: downhill shaping of welded steel pipe equipment can significantly reduce edge extension.2. Increase the extension in the middle of the billet: During the forming process, the reduction of the hole pattern is increased, so that the gap between the upper and lower rollers i

The production process of straight seam welded pipe is simple, the production efficiency is high, the cost is low, and the development is rapid. The strength of the spiral welded pipe is generally higher than that of the straight seam welded pipe, and the welded pipe with a larger diameter can be pr