Duplex and Super Duplex UNS S32205 Lap Joint Flanges

The Duplex and Super Duplex UNS S32205 Lap Joint Flange (LJ Flange) is a unique type of flange designed to be used in conjunction with a stub end, which is butt-welded to the pipe. The flange itself is loose, allowing it to spin freely around the stub end. This feature makes the Lap Joint Flange exceptionally valuable for applications where quick assembly and alignment of bolt holes are crucial, significantly reducing installation time. Zeron Fasteners manufactures these flanges using the high-strength UNS S32205 (Duplex 2205) material. Its primary application is in systems requiring frequent dismantling for inspection, cleaning, or modification, particularly in chemical and food processing industries. Importantly, only the cheaper stub end component is exposed to the corrosive fluid, while the reusable Duplex flange provides the necessary mechanical strength and superior corrosion resistance against external factors.

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UNS S32205 Lap Joint Flanges

Duplex and Super Duplex UNS S32205 Lap Joint Flanges

Manufacturing Specifications
Standard ASME B16.5, ASME B16.47, MSS SP-44, API 6A
Grades Duplex UNS S32205 (2205), Super Duplex UNS S32750 (2507)
Size Range 1/2 inch to 60 inch
Pressure Class 150 LBS to 2500 LBS
Type Lap Joint Flange (LJ), Loose Backing Flange
Facing Type Used with Lap Joint Stub Ends LJSF LJTJF

Chemical Composition (UNS S32205)

Element Composition (%)
Carbon (C) Max 0.030
Chromium (Cr) 22.0 to 23.0
Nickel (Ni) 4.50 to 6.50
Molybdenum (Mo) 3.00 to 3.50
Nitrogen (N) 0.14 to 0.20
Manganese (Mn) Max 2.00
Silicon (Si) Max 1.00

Mechanical Properties (UNS S32205)

Property Value
Tensile Strength (Min) 655 MPa Min
Yield Strength (Min) 450 MPa Min
Elongation (Min) 25% Min
Hardness (Max) 290 HBW Max
Impact Energy 100 J Min

Features Product

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