Yuhong Group Co.,Ltd
| 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 |
| Brand Name | YUHONG |
| Model Number | ASTM A182 F51 |
| Certification | API, PED |
| Place of Origin | CHINA |
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Product Specification
| 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 |
| Brand Name | YUHONG | Model Number | ASTM A182 F51 |
| Certification | API, PED | Place of Origin | CHINA |
| High Light | ASTM A182 F51 duplex steel flanges ，corrosion resistant WNRF flanges ，Class 150-2500 duplex steel flanges | ||
ASTM A182 F51 WNRF Flanges | Duplex 2205 Raised Face Flanges Supplier | YUHONG
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.
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 |
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 |
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 |
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Importer,Exporter,Trading Company,Seller,Other
Year Established:
2007
Total Annual:
50M-70M
Employee Number:
50~850
Ecer Certification：
Verified Supplier
YUHONG HOLDING GROUP is one of the largest Procurement, Engineering & Contracting Group companies in China. Our group branch company and factory have been already approved by : ABS, LR, DNV, GL, BV, CCS, KR, PED 97/23/EC, AD2000-WO, GOST9941-81, CCS, TS, CNNC, ISO9... YUHONG HOLDING GROUP is one of the largest Procurement, Engineering & Contracting Group companies in China. Our group branch company and factory have been already approved by : ABS, LR, DNV, GL, BV, CCS, KR, PED 97/23/EC, AD2000-WO, GOST9941-81, CCS, TS, CNNC, ISO9...
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