ANSI 16.5 Big Size Class150 Alloy Monel 400 Blind Flange
ANSI B16.5 Large-Size Class 150 Alloy Monel 400 Blind Flange | SSM
SSM is a trusted manufacturer and global supplier of large-size Class 150 Monel 400 blind flanges, designed for corrosion-resistant and high-performance piping systems. These forged nickel-copper alloy flanges are ideal for marine, offshore, chemical, and petrochemical applications.
1. Product Overview
The Monel 400 blind flange is engineered to terminate or block pipelines, providing safe isolation for maintenance or pressure testing. Available in large diameters, these flanges ensure leak-proof, reliable connections in high-corrosion environments.
Standard: ANSI B16.5 / ASME B16.5
Material: Monel 400 (N04400)
Flange Type: Blind Flange (BL)
Class: 150
Size Range: DN50 – DN1500 (custom large sizes available)
Applications: Offshore platforms, petrochemical plants, marine pipelines
2. Material Properties (Monel 400 / N04400)
| Element | Content (%) |
|---|---|
| Nickel (Ni) | 63 min |
| Copper (Cu) | 28 – 34 |
| Iron (Fe) | 2.5 max |
| Manganese (Mn) | 2 max |
| Carbon (C) | 0.3 max |
| Silicon (Si) | 0.5 max |
Monel 400 provides:
Exceptional corrosion resistance in seawater, chemical, and acidic environments
Excellent resistance to pitting, crevice corrosion, and stress-corrosion cracking
3. Mechanical Properties (Typical)
| Property | Value |
|---|---|
| Tensile Strength | 690 – 850 MPa |
| Yield Strength | 240 – 380 MPa |
| Elongation | 30 – 45% |
| Hardness | ≤ 250 HB |
| Service Temperature | -200°C to +550°C |
4. Key Features
✅ Large Size Design: Suitable for high-capacity pipelines and industrial systems
✅ High Corrosion Resistance: Ideal for marine, offshore, and chemical environments
✅ Durable & Reliable: Maintains mechanical integrity under pressure and temperature
✅ Easy Installation: Blind flange design allows quick pipeline isolation
✅ Standard Compliance: Manufactured to ANSI B16.5 / ASME B16.5 standards
5. Advantages and Limitations
Advantages:
Excellent resistance to oxidation, pitting, and crevice corrosion
Long-lasting performance in harsh industrial environments
Suitable for critical pipeline isolation and maintenance
Limitations:
Higher cost than standard carbon steel flanges
Requires specialized machining and handling due to nickel-copper alloy properties
6. Applications
Offshore Oil & Gas Pipelines
Marine and Shipbuilding Applications
Petrochemical and Chemical Processing Plants
Heat Exchangers and Pressure Vessels
Desalination and Seawater Systems
7. Why Choose SSM
30+ years of experience in Monel 400 flange manufacturing
ISO 9001 and EN 10204 3.1 certified
Compliance with ANSI B16.5, ASME B16.5, and international standards
Advanced forging, CNC machining, and NDT inspection
Fast global delivery and custom design services available
8. Conclusion
The SSM ANSI B16.5 Large-Size Class 150 Monel 400 Blind Flange is engineered for maximum corrosion resistance, high strength, and long-term reliability, making it an ideal choice for critical marine, offshore, and chemical pipelines.
📩 Contact SSM today for a quotation or custom design for your Monel 400 blind flange.
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