The ASTM A234 WPB LR 90° Elbow is the most common carbon steel fitting used for changing pipeline direction. As a Long Radius (LR) elbow, the center-to-face distance is $1.5$ times the nominal pipe diameter (R=1.5D), ensuring smoother flow and lower pressure drop compared to short radius versions. The Butt Welding (BW) ends allow for a full-penetration weld, creating a high-strength, leak-proof joint suitable for high-pressure oil, gas, and steam systems.
Technical Attributes: ASTM A234 WPB LR 90° Elbow
Material Grade,ASTM A216 WPB (Wrought Carbon Steel)
Fitting Type,90 Degree Long Radius (LR) Elbow
Center-to-End Dim,1.5× Nominal Pipe Size (1.5D)
Manufacturing Std,ASME B16.9 / MSS SP-75
End Connection,Butt Welding (BW)
End Preparation,Beveled Ends (per ASME B16.25)
Wall Thickness,"SCH 10, 20, 40 (STD), 80 (XS), 160, XXS"
Size Range,1/2"" to 72" (DN15 - DN1800)
Heat Treatment,Stress Relieved or Normalized
Chemical Comp,"C≤0.30%, Mn:0.29–1.06%, P/S≤0.058%"
Tensile Strength,≥415 MPa (60 ksi)
Yield Strength,≥240 MPa (35 ksi)
Pressure Rating,Matches connected Pipe Schedule
Surface Treatment,Black Painting / Galvanized / Anti-rust Oil
Hardness,≤197 HB
Testing Standard,"Hydrostatic, UT, MT, RT (Optional)"
Certification,EN 10204 3.1 or 3.2
Traceability,Heat Number Hard Stamped
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