Half Round Tube Shield Half Round Tube Shields by Ladhani Metal Corporation are precision-manufactured components designed to protect boiler and heat exchanger tubes from erosion, scaling, slag deposition, and high-temperature corrosion. These shields are essential for ensuring the longevity of tubes in power plants, petrochemical units, and high-heat industrial systems where tubes are subjected to direct flame, abrasive particles, and corrosive gases. Their half-round form enables easy and secure installation over curved or straight tube sections. Cr25Ni20 U Type Outer Half Round Tube Shield The Cr25Ni20 U Type Outer Half Round Tube Shield is fabricated from a high-alloy austenitic stainless steel containing approximately 25% chromium and 20% nickel. This alloy offers exceptional oxidation resistance, thermal stability, and resistance to carburization and sulfidation at elevated temperatures. The outer U-type shield is specifically designed to cover the external arc of U-bend tubes in superheaters, reheaters, and reformers, where they are exposed to intense heat and reactive flue gases. • Outer U Type Half Round Tube Shield – Provides robust coverage to the outer curvature of U-bend tubes, protecting against flame impingement, slag erosion, and high-temperature corrosion. Ladhani Metal Corporation is a leading manufacturer, supplier, and exporter of Cr25Ni20 U Type Outer Half Round Tube Shields, delivering high-performance tube protection for the most demanding thermal and chemical environments. Chemical Composition of Cr25Ni20 – High-Temperature Austenitic Stainless Steel • Carbon (C): ≤ 0.10% • 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: Ideal for extreme heat environments and oxidizing atmospheres such as furnaces, boilers, and process heaters requiring excellent scale resistance and thermal strength. Uses • Outer arc shielding of U-bend tubes in superheaters and reheaters in high-temperature thermal power plants • Protection of external bends in petrochemical heat exchangers and reformers exposed to high-temperature process gases • Coverage for U-bend tubes in waste heat recovery boilers and HRSGs operating under oxidizing and carburizing gas flows • Applied in radiant coils and return bends in industrial furnaces and incinerators exposed to direct flame and slag • Suitable for chemical and gas processing applications where metal surfaces face extreme temperature and thermal fatigue Features • Exceptional high-temperature performance – Resists scaling, oxidation, and deformation at temperatures above 1100°C • Superior corrosion resistance – High chromium and nickel content provide defense against aggressive gas attacks • Targeted outer arc protection – Guards the most exposed section of U-bend tubes from slag, heat, and particulate damage • Precision engineered – Manufactured to custom tube diameter and radius for tight and vibration-free installation • Easy installation – Designed for quick mounting using clamps, tack welds, or stainless steel banding • Long-term durability – Reduces tube replacement frequency and enhances system efficiency in harsh operating conditions Applications • thermal and captive power plants – Installed on outer arcs of U-bend tubes in boilers, superheaters, and reheaters • petrochemical and refinery systems – Shields tubes in steam reformers and process heaters subjected to extreme temperatures • waste heat recovery boilers – Protects tube bends in HRSGs and WHRBs from scale, oxidation, and thermal fatigue • metallurgical and cement industries – Applied in radiant tubes and hot gas ducts exposed to slag, dust, and intense flame • high-temperature chemical plants – Used in reactors and cracking units where resistance to carburizing and oxidizing gases is essential Conclusion The Cr25Ni20 U Type Outer Half Round Tube Shield by Ladhani Metal Corporation—manufacturer, supplier, and exporter—is a high-performance protective component for U-bend tubes exposed to severe thermal and chemical stresses. With outstanding heat resistance, oxidation protection, and structural integrity, it ensures long-term tube life and efficient performance in boilers, heat exchangers, and reformers across thermal, petrochemical, and industrial sectors. For technical consultation, custom orders, or quotations, please contact Ladhani Metal Corporation.
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