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1/2 to 24 ASTM A182 F51 WNRF Flanges Class 150-2500 Corrosion Resistant Duplex Steel
1/2 to 24 ASTM A182 F51 WNRF Flanges Class 150-2500 Corrosion Resistant Duplex Steel
1/2 to 24 ASTM A182 F51 WNRF Flanges Class 150-2500 Corrosion Resistant Duplex Steel
1/2 to 24 ASTM A182 F51 WNRF Flanges Class 150-2500 Corrosion Resistant Duplex Steel
1/2 to 24 ASTM A182 F51 WNRF Flanges Class 150-2500 Corrosion Resistant Duplex Steel
1/2 to 24 ASTM A182 F51 WNRF Flanges Class 150-2500 Corrosion Resistant Duplex Steel
1/2 to 24 ASTM A182 F51 WNRF Flanges Class 150-2500 Corrosion Resistant Duplex Steel
1/2 to 24 ASTM A182 F51 WNRF Flanges Class 150-2500 Corrosion Resistant Duplex Steel
Specifications
Brand Name :
YUHONG
Model Number :
ASTM A182 F51
Certification :
API, PED
Place of Origin :
CHINA
MOQ :
1PC
Price :
Negotiable
Payment Terms :
L/C,T/T
Supply Ability :
100 TONS PER MONTH
Delivery Time :
Depends on quantity
Packaging Details :
PLY-WOODEN CASE
specification standard :
ASTM A182 F51 / ASME SA-182 F51
base material :
Duplex 2205 (22% Cr, 5% Ni, 3% Mo, 0.17% N)
ndt methods :
PT (ASTM E165) + UT (ASME V Art. 4)
flange type :
WNRF (Welding Neck Raised Face)
size range :
1/2" to 24" (DN15 to DN600)
industrial sectors :
Oil & Gas
Description



ASTM A182 F51 WNRF Flanges | Duplex 2205 Raised Face Flanges Supplier | YUHONG



1. Duplex 2205 Flanges Overview: Superior Corrosion Resistance


ASTM A182 F51 WNRF (Welding Neck Raised Face) flanges combine high strength with exceptional chloride stress


corrosion cracking resistance. Manufactured from duplex stainless steel UNS S31803 (EN 1.4462), these flanges


deliver 2x the yield strength of 316L stainless steel while maintaining cost efficiency. Ideal for demanding environments


where pitting, crevice corrosion, or sulfide stress cracking are concerns.



2. F51 Flange Chemical Composition: Optimized Dual-Phase Structure



The corrosion resistance of Duplex 2205 stems from its balanced chemistry:


Element ASTM A182 F51 (%) EN 1.4462 (%) Role in Performance
Chromium (Cr) 21.0 - 23.0 21.0 - 23.0 Pitting/Corrosion Resistance
Nickel (Ni) 4.5 - 6.5 4.5 - 6.5 Austenite Stabilization
Molybdenum (Mo) 2.5 - 3.5 2.5 - 3.5 Chloride Resistance
Nitrogen (N) 0.08 - 0.20 0.10 - 0.22 Strength & Pitting Resistance
Manganese (Mn) ≤ 2.00 ≤ 2.00 Sulfide Control
Carbon (C) ≤ 0.030 ≤ 0.030 Prevents Sensitization
PREN ≥ 34 ≥ 35 Pitting Resistance Equivalent



3. Global Material Equivalents: Cross-Standard Compliance


F51 Duplex flanges meet international specifications:


Standard Grade UNS EN Common Names
ASTM F51 S31803 - Duplex 2205
ASME SA-182 F51 S31803 - ASME B16.5 Flange
EN - - 1.4462 Werkstoff 1.4462
NACE MR0175 Compliant S31803 1.4462 Sour Service Duplex



4. Pressure-Temperature Ratings: ASME B16.5 Compliance



Maximum working pressure by class (PSI @ 100°F/38°C):


Class 150 300 600 900 1500 2500
Pressure 285 740 1480 2220 3705 6170
Max Temp 600°F 600°F 600°F 600°F 600°F 600°F
Min Temp -50°F -50°F -50°F -50°F -50°F -50°F


5. Key Advantages of F51 Duplex Flanges


  • Corrosion Resistance: Withstands chlorides up to 40,000 ppm (vs. 316L’s 2,000 ppm limit)


  • Mechanical Strength: 65 ksi min yield strength – 2x 316L stainless steel


  • Cost Efficiency: 30-40% lower lifecycle cost vs. super austenitic grades


  • Fabrication: Excellent weldability with ER2209 filler metal


  • Certification: PED 2014/68/EU Category I, NACE MR0175/ISO 15156


6. Critical Application Fields


  • Offshore Oil & Gas: Subsea manifolds, seawater cooling systems


  • Chemical Processing: Sulfuric acid pickling, chloride-bearing streams


  • Desalination Plants: RO high-pressure piping, brine heaters


  • Pulp & Paper: Bleach plants, digesters


  • Flue Gas Desulfurization (FGD): Scrubber inlet/outlet ducting

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1/2" to 24" ASTM A182 F51 WNRF Flanges Class 150-2500 Corrosion Resistant Duplex Steel

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Product Detail
Brand Name :
YUHONG
Model Number :
ASTM A182 F51
Certification :
API, PED
Place of Origin :
CHINA
MOQ :
1PC
Price :
Negotiable
Contact Supplier
1/2 to 24 ASTM A182 F51 WNRF Flanges Class 150-2500 Corrosion Resistant Duplex Steel
1/2 to 24 ASTM A182 F51 WNRF Flanges Class 150-2500 Corrosion Resistant Duplex Steel
1/2 to 24 ASTM A182 F51 WNRF Flanges Class 150-2500 Corrosion Resistant Duplex Steel
1/2 to 24 ASTM A182 F51 WNRF Flanges Class 150-2500 Corrosion Resistant Duplex Steel

Yuhong Group Co.,Ltd

Verified Supplier
13 Years
zhejiang, ningbo
Since 2007
Business Type :
Manufacturer, Distributor/Wholesaler, Importer, Exporter, Trading Company, Seller, Other
Main Products :
Stainless Steel Seamless Pipe, Stainless Steel Seamless Tube, Duplex Stainless Steel Pipe
Total Annual :
50M-70M
Employee Number :
50~850
Certification Level :
Verified Supplier
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