ANSI B16.5 Pump Valve Connections Alloy Steel EN 10028-2 Welding Neck Flange
ANSI B16.5 Pump Valve Connections Alloy Steel EN 10028-2 Welding Neck Flange | SSM
SSM is a professional manufacturer and supplier of ANSI B16.5 alloy steel welding neck flanges designed for pump and valve connections in high-pressure and high-temperature applications. Our flanges are manufactured according to EN 10028-2 alloy steel specifications and ASME/ANSI B16.5 dimensional standards, ensuring exceptional durability and sealing performance in demanding industrial environments.
1. Material and Standard
Standard: ANSI / ASME B16.5, EN 10028-2
Type: Welding Neck (WN) Flange
Material: Alloy Steel (e.g. P235GH, 16Mo3, 13CrMo4-5, 10CrMo9-10)
Pressure Rating: Class 150 – Class 2500
Size Range: NPS ½" – 24"
EN 10028-2 covers non-alloy and alloy steels for pressure vessels, offering excellent mechanical strength and temperature resistance for boilers, valves, and pump assemblies.
2. Chemical Composition (Typical 16Mo3 Example)
| Element | % |
|---|---|
| Carbon (C) | 0.12 – 0.20 |
| Manganese (Mn) | 0.40 – 0.90 |
| Silicon (Si) | ≤0.35 |
| Molybdenum (Mo) | 0.25 – 0.35 |
| Phosphorus (P) | ≤0.025 |
| Sulfur (S) | ≤0.010 |
These alloying elements significantly improve creep resistance, high-temperature stability, and oxidation resistance, making the material ideal for continuous service in steam and thermal pipelines.
3. Mechanical Properties
| Property | Typical Value |
|---|---|
| Tensile Strength | 440 – 590 MPa |
| Yield Strength | ≥ 220 MPa |
| Elongation | ≥ 22% |
| Impact Energy (KV) | ≥ 27 J at 20°C |
| Working Temperature | Up to 530°C |
4. Product Features
✅ Enhanced Strength: The forged alloy structure ensures high load-bearing capability for pump and valve joints.
✅ High-Temperature Resistance: Suitable for thermal, oil & gas, and chemical process systems.
✅ Superior Sealing Performance: The long tapered neck provides a smooth stress transition from flange to pipe.
✅ Corrosion Resistance: Excellent resistance to oxidation and high-temperature corrosion.
✅ Custom Options: Available in standard or non-standard sizes, with RF, RTJ, or FF face finishes.
5. Advantages & Limitations
Advantages:
Excellent mechanical and pressure performance.
Ideal for cyclic temperature and pressure environments.
Compatible with various industrial piping standards.
Limitations:
Higher cost than carbon steel due to alloying elements.
Welding requires experienced procedures and heat treatment.
6. Applications
Pump & Valve Connections in refineries and chemical plants
Boiler Systems in power generation
Heat Exchangers & Pressure Vessels
Steam & Thermal Oil Lines
Shipbuilding and Marine Engineering Systems
7. Why Choose SSM
Over 30 years of forging and machining experience
ISO 9001 and EN 10204 3.1 certified
Custom manufacturing based on ANSI, EN, DIN, GOST, and JIS standards
100% inspection and material traceability with heat number identification
Global export experience to Europe, the Middle East, and Southeast Asia
8. Conclusion
The ANSI B16.5 Alloy Steel Welding Neck Flange from SSM provides superior strength, reliability, and performance for pump and valve connections in high-pressure and high-temperature environments. Whether for power plants, oil refineries, or marine systems, SSM ensures precision-engineered flanges that meet international quality standards.
📩 Contact SSM today to request a quotation or discuss custom alloy flange solutions for your next project.
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