Half Round Tube Shield for LTSH Tube
Half Round Tube Shield
Half Round Tube Shields by Ladhani Metal Corporation are specially engineered components used to safeguard boiler and heat exchanger tubes from damage due to high-temperature flue gases, particulate abrasion, and chemical scaling. Designed to fit over curved or straight tube surfaces, these shields are extensively used in power generation and industrial heating systems. The half-round design ensures streamlined installation and effective surface protection in high-wear regions.
Cr25Ni20 Half Round Tube Shield for LTSH Tube
The Cr25Ni20 Half Round Tube Shield is made from a high-temperature, high-chromium nickel alloy (containing approximately 25% chromium and 20% nickel) that offers superior resistance to oxidation, carburization, and sulfidation at elevated temperatures. This grade provides excellent mechanical stability and corrosion resistance, making it suitable for demanding environments such as Low Temperature Superheater (LTSH) zones in boilers.
The Low Temperature Superheater (LTSH) is a section in a boiler where saturated steam from the steam drum is superheated to a moderately higher temperature before entering the high-temperature superheater stages. Positioned in areas with relatively lower flue gas temperatures, the LTSH helps improve thermal efficiency and reduces moisture content in steam. Due to constant exposure to abrasive flue gases and ash, LTSH tubes are prone to wear and require protective shielding, such as half round tube shields, to extend service life.
Ladhani Metal Corporation is a reliable manufacturer, supplier, and exporter of Cr25Ni20 Half Round Tube Shields for LTSH systems, delivering heat- and corrosion-resistant solutions to enhance the durability of superheater tubes.
Chemical Composition of Cr25Ni20 – High-Temperature Chromium-Nickel Alloy
• Carbon (C): ≤ 0.08%
• Manganese (Mn): ≤ 2.00%
• Phosphorus (P): ≤ 0.035%
• Sulfur (S): ≤ 0.030%
• Silicon (Si): ≤ 1.50%
• Chromium (Cr): 24.0 – 26.0%
• Nickel (Ni): 19.0 – 22.0%
• Iron (Fe): Balance
Applications: Ideal for LTSH tubes in environments where protection against thermal fatigue, ash erosion, and high-temperature oxidation is critical.
Uses
• Shields LTSH tubes in coal-fired boilers and HRSGs from ash particle abrasion and flue gas scaling
• Protects tube bends and convection sections in waste heat recovery boilers (WHRBs)
• Suitable for industrial boilers in petrochemical plants and refineries
• Extends the life of tubes in steam generators used in corrosive and high-heat zones
• Effective in biomass plants, waste incineration boilers, and marine heating systems
Features
• Exceptional heat resistance – High chromium and nickel content ensures reliable performance in high-temperature boiler zones
• Superior oxidation and corrosion resistance – Suitable for flue gas streams with corrosive components
• Custom fabrication – Manufactured to match exact tube diameter, length, and curvature requirements
• Easy to install – Supports weld-on, clamp-on, or banding installation methods
• Enhances tube longevity – Reduces wear from fly ash, soot, and gas flow
• Low maintenance – Helps reduce downtime and operational costs in heat exchanger and boiler systems
Applications
• thermal power plants – Protects LTSH tube surfaces from thermal degradation and ash erosion
• chemical processing units – Shields process heater tubes from acidic and oxidizing gases
• WHRBs and HRSGs – Used in tube bends and lower convection sections for abrasion and heat protection
• petrochemical refineries – Ensures long service life of tubes under cyclic temperature exposure
• waste-to-energy plants – Minimizes scaling and wear from contaminated flue gases
Conclusion
The Cr25Ni20 Half Round Tube Shield for LTSH Tube by Ladhani Metal Corporation – manufacturer, supplier, and exporter – is a robust shielding solution for high-temperature, corrosion-prone environments in thermal and industrial boilers. Offering outstanding oxidation resistance, thermal stability, and structural integrity, these shields are designed to protect LTSH tubes and improve system efficiency and longevity.
For technical support, sizing options, or order inquiries, contact Ladhani Metal Corporation.
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