The ASME B16.11 A350 LF2 Threaded Union is a high-pressure, three-piece fitting designed for low-temperature and cryogenic piping maintenance. Forged from fine-grained carbon-alloy steel, it maintains excellent notch toughness down to -46℃. Featuring a precision metal-to-metal ground joint and BSP or BSPT threads, it enables rapid disassembly of LNG and arctic gas lines without welding. Rated for 2000 PSI, it provides a safe, leak-proof solution for systems subject to extreme thermal shock.
Technical Attributes: A350 LF2 2000# Threaded Union
Standard,ASME B16.11 / MSS SP-83
Material Grade,ASTM A350 LF2 Class 1
Fitting Type,Threaded Union (3-Piece)
Pressure Class,2000 LBS (Class 2000)
Size Range,1/8" to 3" (NPS)
Thread Type (BSPT),BS 21 / ISO 7-1 (Tapered)
Thread Type (BSP),BS 2779 / ISO 228-1 (Parallel)
Seal Type,Ground Joint (Metal-to-Metal Seat)
Service Temp,Down to −46∘C (−50∘F)
Impact Energy,≥20 J (Charpy V-Notch at −46∘C)
Tensile Strength,485–655 MPa (70–95 ksi)
Yield Strength,≥250 MPa (36 ksi)
Manufacturing,"Forged, Heat Treated, Machined"
Heat Treatment,Normalizing or Quenching & Tempering
Testing Standard,"Charpy Impact, UT, MT, Thread Gauging"
Hardness,≤197 HBW
Surface Finish,Anti-rust Oil / Galvanized / Phosphated
Certification,EN 10204 3.1 / MTR
Primary Use,Cryogenic Gas & Arctic Oil Maintenance
Contact: Jorge Yang
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