Double-sided submerged arc welded (SSAW) steel pipes are widely used in pipelines for oil, gas, water, and structural applications due to their stable performance and high manufacturing precision. Their production process offers significant technical advantages, especially for large-diameter and thick-walled pipe products. Below are the key technical characteristics that make these pipes reliable and versatile in demanding engineering environments.
1. Uniform Deformation and Low Residual Stress
During forming, the steel plate undergoes uniform deformation with minimal residual stress, ensuring a smooth surface without scratches.
Thanks to this process, spiral welded pipes can be manufactured with greater flexibility in diameter and wall thickness, making them especially suitable for high-strength, thick-walled, and large-diameter applications—an advantage unmatched by many other forming methods.
2. Pre-Welding Followed by Internal & External Precision Welding
The adoption of tack welding before internal and external submerged arc welding helps ensure accurate alignment and stability.
This reduces risks such as weld misalignment, offset, or incomplete penetration, while making the overall weld quality easier to control.
It also supports better on-site connection performance.
3. Mechanical Diameter Expansion for Higher Dimensional Accuracy
Through full mechanical expansion, the steel pipe achieves improved dimensional accuracy and optimized internal stress distribution.
This process not only enhances pipe roundness and stability but also effectively prevents stress corrosion cracking, contributing to safer and more efficient on-site welding and installation.
4. Comprehensive Quality Testing System
Each spiral welded steel pipe undergoes nine 100% inspection procedures, ensuring thorough monitoring at every production stage.
This strengthens defect detection capability and guarantees the final product meets the required technical and safety standards.
5. Intelligent Production Line with Real-Time Data Monitoring
All equipment in the double-sided submerged arc welded spiral pipe production line is integrated into a computerized data acquisition system.
Real-time transmission allows the central control room to monitor and adjust technical parameters and quality indicators throughout the process, significantly improving stability, consistency, and product traceability.
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.
For more information about the product price, catalog and rolling mill inspection certificate,
please consult:Email:Sales@usisteels.com
