The ASME B16.9 Seamless Butt Weld Elbow is a critical piping component used to change flow direction without the risk of weld-seam failure. Manufactured from a single piece of raw material (pipe or billet), it offers uniform wall thickness and superior pressure integrity compared to welded versions. These elbows are designed for high-stress applications in oil, gas, and power plants, providing a smooth internal surface that minimizes turbulence and erosion under high-velocity flow conditions.
Technical Attributes: ASME B16.9 Seamless Elbow
Design Standard,ASME B16.9 (Wrought Factory-Made Fittings)
Manufacturing Type,Seamless (Hot Formed or Cold Drawn)
Angle Options,"45°, 90°, 180° (Short or Long Radius)"
Radius Type,Long Radius (1.5D) or Short Radius (1.0D)
Size Range,"1/2"" to 24"" (Seamless limit; larger are welded)"
Wall Thickness,SCH 5S to SCH XXS (Matches pipe schedule)
Material Grades,"Carbon (A234 WPB), SS (A403 WP304/316), Alloy"
End Connection,Butt Welding (BW)
End Preparation,Beveled Ends per ASME B16.25
Tolerance,Per ASME B16.9 (Outside Diameter & Thickness)
Testing,"Hydrostatic, Ultrasonic (UT), Magnetic Particle (MT)"
Certification,EN 10204 3.1 / MTR (Mill Test Report)
Surface Treatment,"Shot Blasted, Black Paint, or Passivated"
Marking,"Grade, Size, Wall Thickness, Heat No., Standard"
Heat Treatment,"Normalizing, Quenching, or Stress Relieving"
Tensile Strength,"Dependent on material grade (e.g., WPB ≥415 MPa)"
Applicable Service,"High Pressure, High Temperature, Corrosive"
Visual Inspection,Per MSS SP-25 (Standard Marking System)
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