Alloy steel lap joint flanges are designed to be used in conjunction with a stub end, creating a two-piece connection that facilitates easy assembly and disassembly in piping systems. These flanges have a loose flange design that fits over the stub end, allowing for alignment adjustments and easy replacement of the stub end without disturbing the rest of the piping system. Made from high-strength alloy steels like ASTM A182 F11, F22, and A350 LF2, lap joint flanges are suitable for high-pressure and high-temperature applications. The alloy steel composition ensures durability and resistance to corrosion, making them ideal for demanding industrial environments such as oil and gas, chemical processing, and power generation. They are particularly advantageous in situations where frequent maintenance or modifications are required, as they allow for quick changes with minimal effort.
| Property | Details |
|---|---|
| Material | Alloy Steel (e.g., ASTM A182 F11, A182 F22, A350 LF2) |
| Standards | ASTM A182, ASTM A350 |
| Type | Lap Joint Flange |
| Flange Dimensions | Sizes typically from 1″ to 24″ |
| Pressure Rating | Class 150, Class 300, Class 600, Class 900, Class 1500 |
| Temperature Rating | Up to 650°C (1200°F) for high-alloy steels |
| Surface Finish | Smooth, sometimes with a raised face (RF) |
| Connection Type | Loose flange, fits over stub end |
| Advantages | Easy alignment, quick replacement, no welding required |
| Applications | Oil and gas, chemical processing, power generation |
| Manufacturing | Forged or cast, heat-treated |
| Ordering Information | Specify material grade, size, pressure class, and standard |
| Suppliers | McMaster-Carr, Grainger, Swagelok, Penn Stainless Products |
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