Lap Joint Flanges are a critical component in piping systems where frequent dismantling and maintenance are required. These flanges are specifically designed to be used with a stub end, allowing the flange to rotate freely around the pipe. This unique design makes installation and alignment much easier, especially in applications where precise positioning is essential. Lap Joint Flanges are widely used in industries such as chemical processing, oil and gas, water treatment, and power generation due to their versatility and cost-effectiveness. The flanges themselves are not in direct contact with the fluid; instead, the stub end handles pressure and flow, which helps reduce the cost of using expensive materials while still maintaining strength and durability.
Available in a wide range of materials, Lap Joint Flanges can be manufactured from Carbon Steel, Stainless Steel (304/304L/316/316L), Alloy Steel, Nickel Alloy, Duplex & Super Duplex Steel, and even exotic materials like Titanium for high-performance applications. These materials ensure excellent mechanical properties, corrosion resistance, and long service life under harsh operating conditions. Depending on the application, they can be fabricated in different pressure classes from ANSI/ASME 150 to 2500, accommodating a wide variety of piping requirements.
Lap Joint Flanges come in multiple types including Slip-On, Weld Neck Lap, and Threaded Lap Flanges, each tailored for specific installation methods. They are available in various dimensions according to international standards such as ASME B16.5, B16.47, and DIN/EN specifications. Their key advantage is the ability to rotate around the pipe, making alignment simple and reducing stress during installation. Furthermore, these flanges can be paired with gaskets of different materials to prevent leakage and maintain a tight seal, even under high temperature and high-pressure conditions.
The combination of flexible installation, material options, and standardized dimensions makes Lap Joint Flanges an ideal choice for industries aiming to balance cost, durability, and ease of maintenance. Whether it’s in chemical plants, food processing units, or offshore facilities, these flanges provide reliability and efficiency while minimizing downtime. Companies like Neonox Overseas provide a full range of Lap Joint Flanges with detailed specifications and certifications to meet global quality standards, ensuring that clients receive both performance and compliance in every piping solution.
| Material | Type | Pressure Class | Size (OD) | Standard | Application |
|---|---|---|---|---|---|
| Carbon Steel (CS) | Slip-On | 150, 300, 600, 900, 1500, 2500 | 1/2" – 48" | ASME B16.5 / B16.47 | Piping systems, low-cost general applications |
| Stainless Steel (304/304L/316/316L) | Slip-On / Weld Neck | 150 – 2500 | 1/2" – 48" | ASME B16.5 / DIN / EN | Chemical, petrochemical, food processing |
| Alloy Steel | Weld Neck | 150 – 2500 | 1/2" – 48" | ASME B16.5 / B16.47 | High-temperature, high-pressure systems |
| Duplex / Super Duplex Steel | Slip-On / Weld Neck | 150 – 2500 | 1/2" – 48" | ASME / EN / ASTM | Marine, offshore, corrosion-prone environments |
| Nickel Alloy (Inconel / Monel) | Slip-On / Weld Neck / Threaded | 150 – 2500 | 1/2" – 48" | ASME / ASTM | Chemical processing, high-temperature systems |
| Titanium | Slip-On | 150 – 1500 | 1/2" – 24" | ASME / ASTM | Exotic applications, corrosion resistance critical |
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