U Type Half Round Tube Shield
Half Round Tube Shield
Half Round Tube Shields by Ladhani Metal Corporation are precision-engineered components used to protect boiler and heat exchanger tubes from erosion, scaling, and high-temperature corrosion. These shields are widely applied in industrial systems exposed to thermal cycling, aggressive gases, and particulate flow. Their half-round shape allows for simple and secure installation over straight or curved tube surfaces, extending tube life and reducing maintenance needs.
Cr25Ni20 U Type Half Round Tube Shield
The Cr25Ni20 U Type Half Round Tube Shield is a high-alloy protective component designed for U-bend tube sections in extreme temperature and corrosive service environments. Manufactured from Cr25Ni20, an austenitic heat-resistant stainless steel containing 25% chromium and 20% nickel, this shield offers exceptional resistance to oxidation, carburization, and high-temperature corrosion. It is ideal for shielding U-bends in heat exchangers, reformers, and superheaters exposed to long-term thermal cycling and aggressive industrial gases.
• Outer U Type Half Round Tube Shield – Protects the outer arc of the U-bend from flame impingement, slag buildup, and high-velocity gas erosion in high-temperature zones.
• Inner U Type Half Round Tube Shield – Shields the inner radius from turbulent gas-induced erosion, scaling, and localized thermal stress cracking.
Ladhani Metal Corporation produces and supplies Cr25Ni20 U Type Half Round Tube Shields to support the performance and longevity of tubes operating under severe thermal and chemical load.
Chemical Composition of Cr25Ni20 – High Chromium-Nickel Austenitic Stainless Steel
• Carbon (C): ≤ 0.20%
• Manganese (Mn): ≤ 1.50%
• Phosphorus (P): ≤ 0.040%
• Sulfur (S): ≤ 0.030%
• Silicon (Si): ≤ 2.00%
• Chromium (Cr): 24.0 – 26.0%
• Nickel (Ni): 19.0 – 22.0%
• Iron (Fe): Balance
Applications: Ideally suited for high-temperature, oxidizing, and carburizing environments where heat resistance, structural integrity, and corrosion protection are essential.
Uses
• Protection of U-bend tubes in superheaters, reheaters, and heat recovery units in thermal power plants
• Shielding curved tube sections in petrochemical reformers and high-temperature process gas systems
• Guarding return bends in waste heat recovery boilers and HRSGs exposed to high thermal gradients and corrosive flue gases
• Coverage of high-stress tube bends in chemical reactors and cracking furnaces
• Suitable for use in metallurgy, cement kilns, and other high-heat processing systems
Features
• Outstanding heat resistance – Cr25Ni20 alloy maintains strength and structural integrity at temperatures exceeding 1000°C, with excellent oxidation resistance.
• Superior corrosion protection – High chromium and nickel content offers strong resistance to carburization, nitridation, and sulfidation in aggressive gas environments.
• Full U-bend coverage – Available in inner and outer configurations for complete protection of curved tube areas from erosion and scaling.
• Precision fit – Custom-fabricated to match specific tube diameters and bend radii for a secure, vibration-free installation.
• Quick installation – Can be mounted using banding, tack welding, or clamps without dismantling existing piping or tube assemblies.
• Long service life – Engineered for durability in cyclic and continuous high-temperature service conditions, reducing downtime and replacement frequency.
Applications
• thermal power generation – Installed on U-bends in superheaters and reheaters to protect against extreme temperatures, slag impact, and flue gas corrosion. Extends service life and enhances system performance.
• petrochemical processing – Used in tube bends of reformers and steam crackers operating in high-temperature, high-hydrocarbon environments. Ensures stability under carburizing conditions.
• waste heat recovery systems – Shields U-tubes in WHRBs and HRSGs from flue gas erosion, slag accumulation, and heat-induced fatigue.
• chemical and refining industries – Provides protection in reactors, heaters, and processing units where acidic and oxidizing gases are present at elevated temperatures.
• metallurgical and cement industries – Ideal for tube bends exposed to extreme temperatures in kilns, furnaces, and gas processing lines.
Conclusion
The Cr25Ni20 U Type Half Round Tube Shield by Ladhani Metal Corporation delivers high-performance protection for U-bend tube sections operating under severe thermal and corrosive stress. With its high chromium-nickel alloy composition, this shield is engineered to withstand intense heat, oxidation, and chemical attack, making it an ideal solution for power generation, petrochemical, and high-temperature industrial systems. Custom-designed for fit, durability, and ease of installation, Cr25Ni20 shields enhance equipment reliability and reduce maintenance costs.
For technical consultation, custom orders, or quotations, please contact Ladhani Metal Corporation.
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