Currently, spiral steel pipe is widely used double-sided submerged arc spiral pipe welding technology, the following of what the submerged arc welding process and the characteristics of the formation.
SAW principle:
Submerged arc welding is the use of thermal energy for electric arc welding, and manual arc welding is different: submerged arc welding wire is exposed, the above does not paint, submerged arc flux is pre indeed be welded at the shop, submerged arc welding wire into the flux, the arc is burning under the flux.
SAW formation process:
Wire and the workpiece, press the start button is pressed after the power of the moment the wire and the workpiece, wire Withdrawing arc ignition, welding carriage to move forward, the conveying wire under continuous to maintain the arc burning under the flux layer, the bottom of the arc the formation of the weld pool. Around the arc, flux melted to form a cavity. The voids and pool continues to advance, and the rear metal solidification bath to form a continuous weld. Since this process is carried out under the flux, so we can not see with the naked eye. By means of X-ray photography can be seen.
As the spiral pipe welding using submerged arc welding technology, in addition to such high production efficiency; production auxiliary less time, saving time for welding; welding conditions clean and no spatter, saving clean-up time; weld quality is high. But also for the delivery of spiral welded pipe plant provides the necessary conditions for making large spiral pipe production time is guaranteed, so is still widely used with.
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