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Seamless U Bending Steel Pipe for Boilers

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January 26, 2026
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Brief: Follow the narrative to see how small design choices affect everyday performance. This video provides a detailed walkthrough of the manufacturing process for ASTM/ASME A/SA213 Seamless U-bending Steel Pipes and Tubes for boilers. You will observe the precision bending techniques, solution annealing for stress relief, and rigorous testing procedures including hydrostatic and dye penetrant tests that ensure reliability in demanding boiler applications.
Related Product Features:
  • Manufactured to ASTM/ASME A/SA213 standards for seamless U-bending steel pipes and tubes.
  • Available in TP304H and various nickel alloys including UNS 10276, 2200, 2201, and 4400.
  • Solution annealing process applied after bending to minimize residual stress.
  • Comprehensive testing includes hydrostatic testing and optional dye penetrant inspection.
  • Supports bending up to 105' (32m) developed length with precision bending dies.
  • Electric resistance stress relief annealing ensures material integrity post-bending.
  • Available in various materials including stainless steel, carbon steel, alloy steel, and duplex steel.
  • Standard export carton packing with reliable delivery timelines.
FAQs:
  • What standards do these U-bending steel pipes comply with?
    These pipes comply with ASTM/ASME A/SA213 standards and are available in various grades including TP304H, nickel alloys, stainless steel, carbon steel, and duplex steel specifications.
  • What post-bending treatments are applied to these tubes?
    After bending, the tubes undergo solution annealing to reduce residual stress, followed by hydrostatic testing and optional dye penetrant testing to ensure quality and performance.
  • What are the available sizes and tolerances for U-bend tubes?
    U-bend tubes are available in ODs from 15.8mm to 38.1mm, with straightness tolerance of max 1.5mm per meter and radius tolerances of +/-3mm for R<100mm and +/-5mm for R≥100mm.
  • What testing and certification is provided with these products?
    Products come with Mill Test Certificate per EN 10204/3.1, and undergo eddy current testing before bending, hydrostatic testing after bending, and OD/WT reduction testing.
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