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ASME B16.5 Alloy Weld Neck Flanges: Superior Integrity for High-Pressure

Alloy Steel Flanges
December 02, 2025
Category Connection: Alloy Steel Flanges
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Tags:
#forged steel flanges #spectacle blind flange #reducing weld neck flange
Brief: Join us for a close-up look at this solution and see it in action. In this video, we demonstrate the ASME B16.5 Alloy Weld Neck Flanges, showcasing their superior integrity for high-pressure applications. You'll see how the long tapered hub design provides the highest strength and fatigue resistance, making these flanges indispensable for severe service conditions in refineries, offshore platforms, and high-pressure steam systems.
Related Product Features:
  • Available in ASME B16.5 pressure classes from Class 150 to Class 2500 with standard sizes from 1/2" to 24" and larger.
  • Features a beveled hub end for full-penetration butt weld matching standard pipe wall thickness.
  • Manufactured from high-grade alloy steels like ASTM A182 F22, F91, and Alloy 20 for maximum durability.
  • Long tapered hub design minimizes stress concentration and provides optimal mechanical stress distribution.
  • Excellent for repeated bending, thermal cycling, and systems subject to significant bending stresses.
  • Allows for easy radiographic inspection and non-destructive testing (NDT) of welds for quality assurance.
  • Ideal for hazardous, toxic, or flammable fluid applications requiring the highest joint integrity.
  • Designed to handle high axial and bending stresses without failure in critical piping systems.
Faqs:
  • What pressure classes and sizes are available for these ASME B16.5 Alloy Weld Neck Flanges?
    These flanges are available in the full range of ASME B16.5 pressure classes from Class 150 to Class 2500, with standard sizes ranging from 1/2" to 24" and larger.
  • What materials are used in manufacturing these weld neck flanges?
    They are manufactured from high-grade alloy steels such as ASTM A182 F22, F91, and Alloy 20, selected for specific corrosion resistance and high-temperature strength requirements.
  • What are the key applications for these high-integrity weld neck flanges?
    They are essential for critical applications including refinery and offshore platform main process lines, high-pressure steam headers, reactor feed lines, and any systems handling hazardous, toxic, or flammable fluids.
  • What are the payment terms for first-time clients?
    For first-time clients, payment terms are 50% advance payment with the remaining 50% balance due before shipment.
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