The ASME B16.11 Forged Socket Weld Full Coupling is a high-pressure fitting used to join two pipes of the same size. Forged for maximum structural integrity, it features a recessed socket at both ends to seat the pipe before fillet welding. This design creates a permanent, leak-proof joint that is far superior to threaded connections in high-vibration and high-pressure environments. It is a fundamental component for small-bore piping in refineries, power plants, and chemical processing facilities.
Technical Attributes: Socket Weld Full Coupling
Standard,ASME B16.11 / BS 3799
Material Grades,"ASTM A105, A182 (F304/L, F316/L), A350 LF2"
Fitting Type,Full Coupling (Straight Joint)
Pressure Class,"3000 LBS, 6000 LBS, 9000 LBS"
Size Range,1/8" to 4" (NPS)
Manufacturing,"Forged, Heat Treated, Fully Machined"
End Connection,Socket Weld (SW)
Internal Design,Center Stop (Shoulder) for Pipe Seating
Tensile Strength,≥485 MPa (Grade A105 / 316L)
Yield Strength,≥170–250 MPa (Grade dependent)
Carbon Content,≤0.35% (Carbon Steel) / ≤0.03% (L-Grades)
Heat Treatment,Normalizing / Solution Annealing
Testing Standard,"UT, MT/PT, Hardness, Dimensional"
Socket Bore (B),Precision machined per B16.11 Table
Socket Depth (C),Minimum requirements per B16.11 Table
Surface Finish,Anti-rust Oil / Pickled / Galvanized
Hardness,≤187–192 HBW
Certification,EN 10204 3.1 / MTR
Primary Use,High-Pressure Straight Pipe Connection
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