Yuhong Group Co.,Ltd
| Payment Terms | T/T, L/C at sight |
| Delivery Time | Depends on quantity |
| Packaging Details | PLYWOOD CASE / WOODEN PALLET |
| Supply Ability | 1000pcs / Month |
| TYPE | WNRF / BLRF etc. |
| Standard | ASTM A182 / ASME SA182 |
| Dimension standard | ASME B16.5 (for sizes up to 24") |
| Pressure classes | 150 – 2500 |
| Brand Name | YUHONG |
| Model Number | ASTM A182 Grade F51 (UNS S31803) |
| Certification | ISO, TUV, PED etc. |
| Place of Origin | CHINA |
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Product Specification
| Payment Terms | T/T, L/C at sight | Delivery Time | Depends on quantity |
| Packaging Details | PLYWOOD CASE / WOODEN PALLET | Supply Ability | 1000pcs / Month |
| TYPE | WNRF / BLRF etc. | Standard | ASTM A182 / ASME SA182 |
| Dimension standard | ASME B16.5 (for sizes up to 24") | Pressure classes | 150 – 2500 |
| Brand Name | YUHONG | Model Number | ASTM A182 Grade F51 (UNS S31803) |
| Certification | ISO, TUV, PED etc. | Place of Origin | CHINA |
What is ASTM A182 F51 Flange?
A182 F51 duplex stainless steel is a compound stainless steel alloyed with 21% chromium, 2.5% molybdenum and 4.5% nickel-nitrogen. it has high strength, good impact toughness and good overall and localized resistance to stress corrosion. It has high strength, good impact toughness, and good overall and localized resistance to stress corrosion.The yield strength of A182 F51 duplex stainless steel is twice that of austenitic stainless steels, a characteristic that allows designers to reduce weight when designing products and gives this alloy a price advantage over 316 and 317L.
ASTM A182 F51 (UNS S31803) Body Flange is a forged duplex stainless steel flange designed for high-pressure piping systems. With a balanced microstructure of austenite and ferrite, it offers high strength, excellent corrosion resistance, and superior performance in chloride-rich, marine, and chemical environments. Commonly supplied as a Weld Neck Raised Face (WNRF) type, it is widely used in oil & gas, petrochemical, and offshore applications, meeting ASME and NACE standards.
Key Advantages of ASTM A182 F51 Flange
High mechanical strength and pressure handling
Exceptional corrosion resistance in chloride-rich and aggressive environments
Long service life and reduced maintenance
Balanced properties make it ideal for critical process piping systems
Chemical Composition of A182 F51 Flanges
| C | Mn | Si | P | S | Cr | Mo | Ni | N | Fe |
|---|---|---|---|---|---|---|---|---|---|
| 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 22.0 – 23.0 | 3.0 – 3.5 | 4.50 – 6.50 | 0.14 – 0.20 | 63.72 min |
Mechanical Properties of A182 F51 Flanges
| Tesile | Requirements |
|---|---|
| Tensile Strength / min. MPa [ksi] | 620 [90] |
| Yield Strength / min. MPa [ksi] | 450 [65] |
| Elongation in 2", min. % | 25 |
| Reduction of Area, min. % | 45 |
Pressure-Temperature Rating for ASME B16.5 Flanges
| Temp, ℃ | Pressure-temperature rating for ASME B16.5 | ||||||
| 150 | 300 | 400 | 600 | 900 | 1500 | 2500 | |
| -29 to 38 | 20.0 | 51.7 | 68.9 | 103.4 | 155.1 | 258.6 | 430.9 |
| 50 | 19.5 | 51.7 | 68.9 | 103.4 | 155.1 | 258.6 | 430.9 |
| 100 | 17.7 | 50.7 | 67.5 | 101.3 | 152.0 | 253.3 | 422.2 |
| 150 | 15.8 | 45.9 | 61.2 | 91.9 | 137.8 | 229.6 | 382.7 |
| 200 | 13.8 | 42.7 | 56.9 | 85.3 | 128.0 | 213.3 | 355.4 |
| 250 | 12.1 | 40.5 | 53.9 | 80.9 | 121.4 | 202.3 | 337.2 |
| 300 | 10.2 | 38.9 | 51.8 | 77.7 | 116.6 | 194.3 | 323.8 |
Application of ASTM A182 F51 body Flange
Offshore and onshore pipelines
Subsea equipment
Manifolds and risers
Sour service environments (H₂S) – NACE-compliant
Seawater cooling systems
Ballast water treatment
Desalination units
Corrosion-resistant piping components
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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