Super Duplex 2507 Flange ASTM A182 UNS S32750 / F53 Super Duplex Weld Neck Flange
ASTM A182 F53 / UNS 32750 / Super Duplex 2507 Weld Neck Flange WNRF Flange
A Super Duplex 2507 Weld Neck Flange is a high-strength, corrosion-resistant pipe connecting component manufactured from forged super duplex stainless steel grade UNS S32750 (ASTM A182 Grade F53). "Weld Neck" is a long, tapered hub that transitions smoothly into the pipe wall via a single butt-weld joint. This flange is defined by its balanced dual-phase microstructure (approximately 50% austenite / 50% ferrite), which provides exceptional mechanical strength and outstanding resistance to localized corrosion in highly aggressive environments. It is fully compliant with the ASTM A182 standard for forged components used in high-temperature and high-pressure services.
Chemical Composition of ASTM A182 F53 Super Duplex Steel Flange Duplex 2507 Weld Neck Flange
| Element % | C | Mn | P | S | Si | Cr | Ni | Mo | N | Cu |
| Super Duplex F53 | 0.03 max | 1.2 max | 0.035 max | 0.015 max | 0.8 max | 24-26 | 6-8 | 3-5 | 0.24-0.32 | 0.5 max |
Mechanical properties of ASTM A182 F53 Super Duplex Steel Flange Duplex 2507 Weld Neck Flange
| Alloy | Tensile Strength ksi | Proof Strength 0.2% ksi (min) |
Elongation (%) (min) |
Elongation (%) (min) |
| Super Duplex F53 Annealed Condition |
110-135 |
80 |
15 |
16 |
| ASME B16.5 Super Duplex 2507 Flanges | EN TYPE | DIN |
|
WN – Welding Neck |
EN-TYPE 11 |
DIN 2631 |
| DIN 2632 | ||
| DIN 2633 | ||
| DIN 2634 | ||
| DIN 2635 | ||
| BL – Blind | EN-TYPE 05 | DIN 2527 |
| SO – Slip On | EN-TYPE 01/12 | |
|
LJ – Lap Joint |
EN-TYPE 02/04 |
DIN 2641 |
| DIN 2642 | ||
| DIN 2655 | ||
| DIN 2656 | ||
| LWN – Long Welding Neck / Integral | EN-TYPE 21 | |
| Welding Collars | EN-TYPE 32/34 | |
| Super Duplex 2507 Flat Flange for Welding | DIN 2573 | |
| DIN 2576 | ||
| SW – Socket Weld | EN-TYPE 14 | |
| THR – Threaded | EN-TYPE 13 | DIN 2566 |
| Super Duplex 2507 Lap Joint Short Stub End | DIN 2673 | |
| Super Duplex Steel 2507 Orifice Flanges, Super Duplex SS 2507 Swivel Flanges, Spades, Spacer Rings Super Duplex 2507 F55 Spectable Blinds, API 6A, JIS B2220, VSM, NFE, BS10/BS4504, GOST |
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Application
You will find this specific flange in environments where both mechanical strength and corrosion resistance are paramount:
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Oil & Gas: Subsea manifolds, offshore platform risers, and high-pressure wellhead equipment (handling sour gas/CO₂/H₂S).
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Chemical Processing: Heat exchangers and piping carrying chlorides, acetic acid, or sulfuric acid.
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Marine/Desalination: Seawater cooling systems and reverse osmosis high-pressure piping.
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Pulp & Paper: Bleaching plants (handling chlorine dioxide).
NO CRACK (PT TEST)
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