ASME B16.5 Forged Wn Flange DN250 Ss/Alloy (A182/A403/A815) , Anti-Rust Coating, En1092-1 Compliant
ASME B16.5 Forged DN250 WN Flange | Stainless Steel & Alloy (A182/A403/A815) | SSM
SSM is a trusted manufacturer and global supplier of ASME B16.5 forged welding neck (WN) flanges in stainless steel and alloy materials, engineered for high-pressure and critical industrial piping systems. Our flanges meet EN1092-1 compliance standards and come with anti-rust coatings for extended protection.
1. Product Overview
The DN250 Forged Welding Neck Flange is designed for secure, leak-proof pipeline connections in demanding applications such as oil & gas, chemical, petrochemical, and power plants.
Standard: ASME B16.5 / EN1092-1
Size: DN250 (10")
Pressure Rating: Class 150 – Class 2500
Materials:
Stainless Steel: A182 / A403
Alloy Steel: A815
Facing Type: RF (Raised Face) / FF (Flat Face) / RTJ (Ring Type Joint)
Surface Protection: Anti-rust coating
2. Material Properties
A182 Stainless Steel
Excellent corrosion resistance in both oxidizing and reducing environments
High mechanical strength at moderate to high temperatures
A403 Stainless Steel
Suitable for seamless and welded pipe flanges
Good ductility and weldability
A815 Alloy Steel
Exceptional toughness, high temperature strength, and corrosion resistance
Ideal for pressure vessel and industrial piping applications
3. Mechanical Properties (Typical)
| Material | Tensile Strength | Yield Strength | Elongation | Hardness |
|---|---|---|---|---|
| A182 SS | ≥ 515 MPa | ≥ 205 MPa | ≥ 35% | ≤ 217 HB |
| A403 SS | ≥ 485 MPa | ≥ 205 MPa | ≥ 30% | ≤ 217 HB |
| A815 Alloy | ≥ 620 MPa | ≥ 290 MPa | ≥ 25% | ≤ 235 HB |
4. Key Features
✅ High Corrosion Resistance: Performs in marine, chemical, and industrial environments
✅ High Strength & Durability: Maintains integrity under high pressure and temperature
✅ Anti-Rust Coating: Protects flanges during storage and transportation
✅ Easy Installation: Welding neck design ensures secure alignment with pipelines
✅ Standards Compliance: Fully compliant with ASME B16.5 and EN1092-1
5. Advantages and Limitations
Advantages:
Reliable in high-pressure and high-temperature systems
Resistant to corrosion and oxidation
Long-lasting performance with protective coating
Limitations:
Higher material cost than carbon steel flanges
Requires skilled welding for alloy materials
6. Applications
Oil & Gas Pipelines
Chemical & Petrochemical Plants
Offshore & Marine Platforms
Power Generation & Steam Systems
Heat Exchangers & Pressure Vessels
7. Why Choose SSM
30+ years of experience in stainless steel and alloy flange manufacturing
Certified ISO 9001 / EN 10204 3.1
Compliance with ASME B16.5, EN1092-1, and MSS SP-44
Advanced forging, CNC machining, and NDT inspection
Global delivery and custom design services available
8. Conclusion
The SSM DN250 ASME B16.5 Forged WN Flange in stainless steel or alloy combines strength, corrosion resistance, and precision engineering, making it ideal for critical industrial piping applications.
With anti-rust coating and full standard compliance, these flanges provide reliable long-term performance in demanding environments.
📩 Contact SSM today for a quotation or custom specifications for your DN250 forged welding neck flange.
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