Blind flanges are specialized flange components designed to close the end of a piping system or pressure vessel, providing a secure and leak-proof seal. Unlike other flanges, blind flanges do not have a bore or opening, making them ideal for applications where flow needs to be completely stopped or future access points are planned. Manufactured with precision and high-quality materials, blind flanges are widely used in industries such as oil and gas, petrochemical, chemical, water treatment, power generation, and shipbuilding. They are available in various materials, including Carbon Steel, Stainless Steel (304, 304L, 304H, 316, 316L, 321), Alloy Steel, Nickel Alloys, Duplex, Super Duplex, and Titanium, allowing them to withstand extreme temperatures, high pressures, and corrosive environments.
These flanges come in different pressure ratings such as 150#, 300#, 600#, 900#, 1500#, and 2500#, and standard dimensions according to ANSI/ASME B16.5, B16.47, DIN, BS, and EN standards. Blind flanges can be weld neck, slip-on, threaded, or lap joint type, offering flexibility for various piping designs. The high mechanical strength and precise machining ensure proper alignment with adjoining flanges, preventing leakage and reducing maintenance. In addition, blind flanges are often used during system maintenance to isolate sections of pipelines, allowing safe inspection and cleaning. Their versatility, durability, and compliance with international standards make them an essential component in high-performance piping systems.
Neonox Overseas supplies a comprehensive range of blind flanges, combining reliability, material quality, and precision engineering. Each product is thoroughly tested for dimensional accuracy, pressure resistance, and surface finish, ensuring superior performance in industrial applications. With a focus on international quality standards, the blind flanges offered by Neonox Overseas cater to both domestic and global markets, providing solutions for challenging industrial environments.
| Material | Grade / Specification | Type | Pressure Rating | Standards | Diameter Range (inches) | Applications |
|---|---|---|---|---|---|---|
| Carbon Steel | A105, A350 LF2 | Weld Neck, Slip-On, Threaded, Lap Joint | 150# – 2500# | ANSI/ASME B16.5, B16.47 | 1/2" – 60" | Oil & Gas, Petrochemical |
| Stainless Steel | 304/304L/304H/304LN/316/316L/321 | Weld Neck, Slip-On, Threaded, Lap Joint | 150# – 1500# | ANSI/ASME B16.5, DIN, EN | 1/2" – 48" | Chemical, Food Processing, Water Treatment |
| Alloy Steel | SA182 F11, F22, F5 | Weld Neck, Slip-On | 150# – 2500# | ANSI/ASME B16.5, B16.47 | 1/2" – 48" | Power Plants, High Temp & Pressure Systems |
| Nickel Alloys | Inconel 600, 625, 718 | Weld Neck, Slip-On | 150# – 1500# | ASME/ASTM | 1/2" – 36" | Chemical, Marine, Corrosive Applications |
| Duplex / Super Duplex | 2205, 2507 | Weld Neck, Slip-On | 150# – 1500# | ANSI/ASME, DIN | 1/2" – 48" | Marine, Offshore, Petrochemical |
| Titanium | Grade 2, Grade 5 | Weld Neck, Slip-On | 150# – 600# | ASME B16.5, ASTM | 1/2" – 24" | Marine, Chemical, Corrosive Fluids |
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