ASTM A182 F321 WNRF Flange Manufacturer | Stainless Steel Weld Neck Raised Face Flanges
Product Description
YUHONG supplies high-quality ASTM A182 F321 WNRF Flanges manufactured according to ASME B16.5, ASME B16.47, MSS SP-44, and EN standards. Grade F321 is a titanium-stabilized austenitic stainless steel that offers excellent resistance to intergranular corrosion after exposure to elevated temperatures.
The Welding Neck Raised Face (WNRF) design provides superior strength and stress distribution, making it ideal for high-pressure, high-temperature, and critical piping systems used in petrochemical plants, refineries, offshore platforms, LNG projects, and power generation facilities.
All flanges are produced from forged stainless steel materials and undergo strict dimensional inspection, PMI testing, and mechanical testing before shipment.
Product Specifications
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Item
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Details
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Product Name
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ASTM A182 F321 WNRF Flange
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Material Grade
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ASTM A182 F321 / UNS S32100
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Flange Type
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Welding Neck Raised Face (WNRF)
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Standard
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ASME B16.5, ASME B16.47, EN 1092-1
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Pressure Rating
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Class 150, 300, 600, 900, 1500, 2500
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Size Range
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1/2" – 60"
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Facing Type
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RF, RTJ, FF
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Manufacturing Process
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Forged
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Surface Finish
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Smooth Machined Finish
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Inspection
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PMI, UT, Mechanical Test, Dimension Inspection
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Certificate
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EN10204 3.1 / MTC
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Origin
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China
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Brand
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YUHONG
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Chemical Composition of F321 Stainless Steel
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Element
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Content (%)
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Carbon
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≤0.08
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Chromium
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17.0–19.0
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Nickel
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9.0–12.0
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Titanium
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5×C min – 0.70 max
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Manganese
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≤2.00
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Silicon
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≤1.00
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Phosphorus
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≤0.045
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Sulfur
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≤0.030
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Key Features
- Excellent Corrosion Resistance
Provides outstanding resistance to atmospheric corrosion and many chemical environments.
- Titanium Stabilized Grade
Titanium addition prevents chromium carbide precipitation and intergranular corrosion.
- High Temperature Performance
Suitable for continuous service up to approximately 870°C.
Can be welded without risk of post-weld sensitization.
Ideal for demanding industrial applications requiring durability and reliability.
Applications
ASTM A182 F321 WNRF Flanges are widely used in:
Product Advantages
✓ Direct Factory Supply
✓ Competitive Price
✓ Fast Delivery
✓ Full Traceability
✓ EN10204 3.1 Certification
✓ Third-Party Inspection Available
✓ Custom Dimensions Accepted
✓ Global Export Experience
Packing & Shipping
Standard export seaworthy packing:
Suitable for sea freight, air freight, and project cargo transportation.
Why Choose YUHONG?
YUHONG is a professional manufacturer and supplier of stainless steel, duplex steel, nickel alloy, and alloy steel flanges, fittings, pipes, and tubes. With more than 15 years of international project supply experience, we provide reliable piping solutions to customers in over 80 countries worldwide.
Our products comply with ASTM, ASME, DIN, EN, JIS, and GOST standards and are widely used in EPC projects, refineries, offshore platforms, and industrial plants.
Key words
ASTM A182 F321 Flange, F321 WNRF Flange, Stainless Steel Welding Neck Flange, ASME B16.5 Flange, Raised Face Flange, Forged Stainless Steel Flange, UNS S32100 Flange, Class 150 WNRF Flange, Class 300 Welding Neck Flange, Stainless Steel RF Flange Manufacturer, ASTM A182 Flange Supplier China, F321 Stainless Steel Flange Exporter
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