ASTM A182 Grade F22 Alloy Steel Spectacle Blind Flanges, also known as figure-8 or blinds, are designed to effectively block off or isolate sections of a pipeline. These flanges are used in high-pressure and high-temperature environments and are made from Grade F22 alloy steel, which provides superior strength and resistance to heat and corrosion. The “spectacle” design consists of two flanges: one solid (blind) and one with a hole (spacer). This design allows for easy removal and replacement without disassembling the entire pipe system. ASTM A182 standards ensure that these flanges meet rigorous quality requirements for use in critical applications such as chemical processing, oil & gas, and power generation.
| Property | Details |
|---|---|
| Material | Grade F22 Alloy Steel |
| Standards | ASTM A182, ANSI/ASME B16.5 |
| Type | Spectacle Blind Flange |
| Dimensions | Custom sizes available |
| Pressure Rating | Class 150, Class 300, Class 600, Class 900, Class 1500 |
| Temperature Rating | Suitable for high-temperature applications |
| Surface Finish | Smooth, precision-machined |
| Installation | Bolted between two flanges or pipeline sections |
| Applications | Chemical processing, oil & gas, power generation |
| Advantages | Allows easy isolation and maintenance |
| Function | Blocks or isolates pipeline sections |
| Manufacturing | Precision-machined for accurate dimensions |
| Ordering Information | Specify material grade, sizes, pressure class |
| Suppliers | McMaster-Carr, Grainger, Swagelok, Penn Stainless Products |
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