is made of steel plate as raw material, and is often extruded by automatic double-wire double-sided submerged arc welding process. DSAW pipe is simple, high efficiency and low cost. In the steel pipe forming steel plate deformation evenly, the residual stress is small, does not appear to scratch the surface of the phenomenon. In the diameter and thickness of the steel pipe size specifications can be used flexibly in the production of large diameter thick seam steel pipe advantage is more obvious. In the production process can be pre-welded after welding inside and outside, to ensure that welding does not appear wrong side, welding bias and not penetration and other defects, the quality of welding control easier.
Advantages of dsaw pipe is more obvious. In the production process can be pre-welded after welding inside and outside, to ensure that welding does not appear wrong side, welding bias and not penetration and other defects, the quality of welding control easier.
Details advantages of dsaw pipe:
The first advantage is the full realization of automation;
The second advantage, it is under the submerged arc welding, so its heat exchange and protection performance is relatively strong, welding quality is relatively high;
The third advantage, due to submerged arc welding in the arc buried under the welding, so it can use high current, welding efficiency is relatively high, recently our country is ongoing West-East Pipeline project.
Into the welding wire, with the welding device and the wire, continuous feeding to the welding wire, this welding method is continuous feeding of the wire, in the melting of the granular flux covered by the arc, so that welding wire, and a part of the flux melting and evaporation constitute a cavity, the arc is stable inside the cavity burning, so it is called submerged arc welding.
Inside the cavity. Pipeline is a high-strength steel, this pipe in the factory first pre-made into a section, and then get the site, in the field of welding, this pipe factory in the welding process is the use of submerged arc welding, submerged arc welding has developed into a double wire submerged arc welding, as well as multi-wire submerged arc welding, the efficiency is further improved.