Nickel Alloy Inconel 625 B16.48 Spectacle Blind Flange
Nickel Alloy Inconel 625 B16.48 Spectacle Blind Flange | SSM
SSM is a trusted manufacturer and global supplier of Nickel Alloy Inconel 625 Spectacle Blind Flanges, produced in accordance with ASME B16.48 and international standards. Designed for high-pressure and high-temperature pipeline isolation, these spectacle blinds are widely used in chemical plants, offshore platforms, oil refineries, and marine engineering.
1. Product Overview
The Inconel 625 Spectacle Blind Flange is a safety device used to isolate or block pipelines during maintenance or pressure testing. It consists of two discs - one solid (blind) and one open (spacer) - connected by a small bridge. This allows operators to easily switch between open and closed positions without removing the entire assembly.
Standard: ASME B16.48 / ASME B16.5
Material: Nickel Alloy Inconel 625 (UNS N06625)
Size Range: DN15 – DN600 (½" – 24")
Pressure Rating: Class 150 – Class 2500
Facing Type: RF / RTJ / FF
Form: Spectacle Blind / Figure-8 Blind
2. Chemical Composition (Inconel 625)
| Element | Content (%) |
|---|---|
| Nickel (Ni) | 58.0 min |
| Chromium (Cr) | 20.0 – 23.0 |
| Molybdenum (Mo) | 8.0 – 10.0 |
| Niobium + Tantalum (Nb + Ta) | 3.15 – 4.15 |
| Iron (Fe) | 5.0 max |
| Carbon (C) | 0.10 max |
The combination of Ni, Cr, Mo, and Nb gives Inconel 625 exceptional resistance to pitting, crevice corrosion, and oxidation, even in acidic and marine environments.
3. Mechanical Properties
| Property | Typical Value |
|---|---|
| Tensile Strength | ≥ 827 MPa |
| Yield Strength | ≥ 414 MPa |
| Elongation | ≥ 30% |
| Density | 8.44 g/cm³ |
| Service Temperature | -196°C to +980°C |
4. Key Features
✅ High Corrosion Resistance: Performs excellently in seawater, acid, and chloride-rich environments.
✅ Superior Strength: Retains mechanical properties at high temperature and pressure.
✅ Excellent Weldability: Suitable for welded or bolted assemblies without post-weld cracking.
✅ Versatile Design: Ideal for quick line isolation and maintenance in industrial systems.
✅ Customizable: Available with raised face (RF), flat face (FF), or ring-type joint (RTJ).
5. Advantages and Limitations
Advantages:
Outstanding performance in oxidizing and reducing environments.
Resistant to stress-corrosion cracking and intergranular attack.
Long service life in offshore, petrochemical, and chemical plants.
Limitations:
Higher material cost compared to stainless steel.
Requires specialized machining due to high strength and toughness.
6. Applications
Oil & Gas Processing Pipelines
Chemical and Petrochemical Plants
Marine & Offshore Equipment
Heat Exchangers & Pressure Vessels
Power Generation Systems
Desalination & Seawater Systems
7. Why Choose SSM
Over 30 years of experience manufacturing nickel alloy flanges
Certified under ISO 9001 and EN 10204 3.1
Full compliance with ASME B16.48, B16.5, and MSS SP-44
Advanced forging, CNC machining, and nondestructive testing (NDT)
Fast global delivery and custom design service available
8. Conclusion
The Inconel 625 B16.48 Spectacle Blind Flange from SSM is engineered for superior corrosion resistance and high mechanical strength in the harshest environments. Whether for pipeline isolation, pressure testing, or maintenance, it provides a reliable and durable sealing solution for critical applications in oil, gas, and marine industries.
📩 Contact SSM today for your Inconel 625 spectacle blind flange quotation or custom design request.
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