Process,Performance,DSAW,Steel technology Process Performance of DSAW Steel Pipe
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DSAW steel pipe is a strip coil as raw material, after extrusion at room temperature, with automatic double wire-sided submerged arc welding process welded spiral seam steel pipe.DSAW steel pipe process performance are as follows:1. Bending performance. Prescribed by apex diameter bend 180 degrees, reinforced by the curved parts of the surface can not crack.2. Reverse bending performance. According to the requirements, it can be reinforced reverse bending performance test. Reverse bending test bending test apex diameter than the corresponding increase in a bar diameter. First bend forward 45 degrees, after the reverse bend 23 degrees, 23 degrees after the reverse bending. After the reverse bending test, reinforced by the curved parts of the surface can not crack.3. The surface quality. Steel surface allowed to have cracks, scarring and folding. Reinforced surface allows the bump, but shall not exceed the height of the transverse ribs, on the other welded steel pipe surface defects depth and height shall not exceed the size of the site where the allowable deviation.
Process,Performance,DSAW,Steel