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Q195/Q235 Welded Round Pipe. 10-Year Warranty: Comprehensive 10-year warranty coverage for all welded round pipes. Wide Size Range: Outer diameter from 12.7mm to 2820mm with wall thickness 0.4-20mm. Multiple Material Options: Available in Q195, Q235, Q345, and 16Mn carbon steel grades. Customizable Surface: Surface treatment options include Black, Annealed, or Bright finishes. OEM/ODM Services: Full customization available from samples or designs. Flexible Packaging: Bare packing or bundled with steel strip options available. Fast Lead Time: Off-season delivery within 15 workdays; peak season one month. Global Standards: Manufactured to meet GB and ASTM international standards.