SSAW (Spiral Submerged Arc Welded) steel pipe is created from strip steel coil, formed into a spiral shape at room temperature, and welded using an automatic double-wire, double-sided submerged arc welding process.
Submerged Arc Automatic Welding Method:
Similar to manual welding, submerged arc automatic welding utilizes slag protection, but instead of using electrode coatings, it employs specially smelted welding flux.
The key feature of this method involves using an extrusion device to compress the inner surfaces of the steel plates on both sides of the unwelded seam. This eliminates uneven protrusions and ensures the inner sides are clean and smooth before welding.
The extrusion device also functions as a positioning tool for the welding head, keeping it tightly fixed. As the extrusion device moves along the unwelded seam, it ensures the welding head follows precisely, maintaining its position in the center of the seam. This ensures stable and excellent weld quality, minimizing the need for manual repairs.
Advantages of the Welding Method:
Automation: The welding process is automated, enhancing efficiency and consistency.
Submerged Arc Welding: This method provides strong heat exchange and protection, leading to high-quality welds.
Stable Arc: The arc is buried under the flux, stabilizing the welding process.
Differences in Submerged Arc Automatic Welding:
Unlike manual welding, which uses welding rods, submerged arc automatic welding uses welding wires that can be continuously fed.
Welding rods require frequent replacement after burning out, interrupting the welding process. In contrast, welding wires are fed continuously by a wire feeding device and reel, allowing for uninterrupted welding.
During the welding process, the wire is fed continuously under the cover of meltable granular flux. This flux creates a cavity where the arc burns stably, ensuring consistent and high-quality welds. This process is why it is termed submerged arc automatic welding.
Overall, the SSAW steel pipe welding method ensures high-quality welds with minimal manual intervention, leveraging the advantages of automated and submerged arc welding techniques.
United Steel Industry As the most important steel pipe manufacturer and exporter in China, in the past 20 years, we have completed more than 100 projects, with partners in more than 100 countries, and established relationships with oil and gas and EPC companies in many countries business relationship.
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please consult:Email:Sales@usisteels.com
