Durable Protection with Half Round Straight Tube Shields for Boiler and Heat Exchanger Tubes - LADHANI METAL CORPORATION

Introduction
Ladhani Metal Corporation is a leading manufacturer and global supplier of advanced boiler tube shielding components engineered for harsh industrial environments. The Half Round Straight Tube Shield is designed to provide robust protection for long, straight boiler tube sections in superheaters, economizers, and water walls. These shields are ideal for preventing erosion, corrosion, and slag damage in high-temperature areas of power plants and process industries.

What is a Half Round Straight Tube Shield?
A Half Round Straight Tube Shield is a semi-cylindrical cladding component fitted along the straight segments of boiler or heat exchanger tubes. It acts as a mechanical and thermal barrier, protecting the exposed surface from abrasive flue gases, high-temperature corrosion, and slag buildup. Commonly used in utility boilers and HRSGs, this shield extends the service life of the underlying tube by absorbing wear and impact forces during prolonged operations.

Purpose and Functionality
The Half Round Straight Tube Shield serves as a replaceable protective layer that minimizes metal wastage and tube thinning. Installed along vertical or horizontal straight tube runs, it resists ash erosion, fly ash corrosion, and thermal cycling stress. Its form-fitted geometry allows easy alignment and coverage, and it can be either tack-welded or clipped on, depending on operational requirements. The use of shields helps reduce unscheduled downtime and increases boiler availability.

Key Features
· Designed for straight tube lengths in boiler assemblies
· High resistance to erosion, abrasion, and slag fouling
· Manufactured from heat-resistant stainless steel and alloys
· Available in various thicknesses and lengths
· CNC-formed for precision fit and installation
· Offered with clip-on or weld-on fixing options
· Easily replaceable during routine maintenance

Product Range

Material Grades Offered by Ladhani Metal Corporation
We manufacture Half Round Straight Tube Shields in a broad spectrum of corrosion and heat-resistant materials tailored to diverse industrial needs. Available grades include:

· Stainless Steel 304 / 304L
· Stainless Steel 316 / 316L
· Stainless Steel 310 / 310S
· Stainless Steel 410 / 420 / 430
· Cr25Ni20
· 1Cr25Ni20Si2
· Cr23Ni13
· 1Cr20Ni14Si2
· Other special alloys upon request

Chemical Composition of the Following Grades

1Cr18Ni9Ti
• Carbon (C): ≤ 0.12%
• Silicon (Si): ≤ 1.00%
• Manganese (Mn): ≤ 2.00%
• Phosphorus (P): ≤ 0.035%
• Sulfur (S): ≤ 0.030%
• Chromium (Cr): 17.0 – 19.0%
• Nickel (Ni): 8.0 – 11.0%
• Titanium (Ti): ≥ 5×C and ≤ 0.80%
• Iron (Fe): Balance

Cr25Ni20 (Similar to AISI 310)
• Carbon (C): ≤ 0.20%
• Silicon (Si): ≤ 1.50%
• Manganese (Mn): ≤ 2.00%
• Phosphorus (P): ≤ 0.035%
• Sulfur (S): ≤ 0.030%
• Chromium (Cr): 24.0 – 27.0%
• Nickel (Ni): 19.0 – 22.0%
• Iron (Fe): Balance

1Cr25Ni20Si2
• Carbon (C): ≤ 0.20%
• Silicon (Si): 1.00 – 2.50%
• Manganese (Mn): ≤ 1.50%
• Phosphorus (P): ≤ 0.035%
• Sulfur (S): ≤ 0.030%
• Chromium (Cr): 24.0 – 27.0%
• Nickel (Ni): 19.0 – 22.0%
• Iron (Fe): Balance

Cr23Ni13
• Carbon (C): ≤ 0.20%
• Silicon (Si): ≤ 1.50%
• Manganese (Mn): ≤ 2.00%
• Phosphorus (P): ≤ 0.035%
• Sulfur (S): ≤ 0.030%
• Chromium (Cr): 22.0 – 24.0%
• Nickel (Ni): 12.0 – 14.0%
• Iron (Fe): Balance

1Cr20Ni14Si2
• Carbon (C): ≤ 0.15%
• Silicon (Si): 1.00 – 2.50%
• Manganese (Mn): ≤ 1.50%
• Phosphorus (P): ≤ 0.035%
• Sulfur (S): ≤ 0.030%
• Chromium (Cr): 19.0 – 21.0%
• Nickel (Ni): 13.0 – 15.0%
• Iron (Fe): Balance

Stainless Steel 304 / 304L
• Carbon (C): ≤ 0.08% / ≤ 0.03%
• Silicon (Si): ≤ 1.00%
• Manganese (Mn): ≤ 2.00%
• Phosphorus (P): ≤ 0.045%
• Sulfur (S): ≤ 0.030%
• Chromium (Cr): 18.0 – 20.0%
• Nickel (Ni): 8.0 – 12.0%
• Iron (Fe): Balance

Stainless Steel 316 / 316L
• Carbon (C): ≤ 0.08% / ≤ 0.03%
• Silicon (Si): ≤ 1.00%
• Manganese (Mn): ≤ 2.00%
• Phosphorus (P): ≤ 0.045%
• Sulfur (S): ≤ 0.030%
• Chromium (Cr): 16.0 – 18.0%
• Nickel (Ni): 10.0 – 14.0%
• Molybdenum (Mo): 2.0 – 3.0%
• Iron (Fe): Balance

Stainless Steel 310 / 310S
• Carbon (C): ≤ 0.25% / ≤ 0.08%
• Silicon (Si): ≤ 1.50%
• Manganese (Mn): ≤ 2.00%
• Phosphorus (P): ≤ 0.045%
• Sulfur (S): ≤ 0.030%
• Chromium (Cr): 24.0 – 26.0%
• Nickel (Ni): 19.0 – 22.0%
• Iron (Fe): Balance

Stainless Steel 410
• Carbon (C): 0.08 – 0.15%
• Silicon (Si): ≤ 1.00%
• Manganese (Mn): ≤ 1.00%
• Phosphorus (P): ≤ 0.040%
• Sulfur (S): ≤ 0.030%
• Chromium (Cr): 11.5 – 13.5%
• Iron (Fe): Balance

Stainless Steel 420
• Carbon (C): 0.15 – 0.40%
• Silicon (Si): ≤ 1.00%
• Manganese (Mn): ≤ 1.00%
• Phosphorus (P): ≤ 0.040%
• Sulfur (S): ≤ 0.030%
• Chromium (Cr): 12.0 – 14.0%
• Iron (Fe): Balance

Stainless Steel 430
• Carbon (C): ≤ 0.12%
• Silicon (Si): ≤ 1.00%
• Manganese (Mn): ≤ 1.00%
• Phosphorus (P): ≤ 0.040%
• Sulfur (S): ≤ 0.030%
• Chromium (Cr): 16.0 – 18.0%
• Iron (Fe): Balance

Applications
Half Round Straight Tube Shields are used in sections of the boiler where prolonged linear exposure to heat and gases requires consistent tube protection. Typical applications include:

· Long straight superheater tubes
· Water wall tubes in vertical or horizontal rows
· Economizer tube banks
· HRSG straight tube assemblies
· Industrial waste heat boiler tubes

Manufacturing Capabilities
Ladhani Metal Corporation utilizes precision CNC rolling, forming, and finishing processes to produce tube shields to exact radius and length specifications. We offer tailored solutions for both standard and complex tube geometries, meeting high-volume and low-volume requirements.

Fixing and Installation Options
· Tack-welded for permanent application
· Clip-on design for removable and rapid installation
· Dual side or extended coverage available for wide-area protection

Conclusion
Ladhani Metal Corporation is Manufacturer, Supplier and Exporter of Half Round Straight Tube Shield. Our products are built to meet the stringent demands of thermal and industrial boiler operations, offering durable protection, easy installation, and long-term cost savings. All shields are manufactured with full quality assurance and traceability.

For technical assistance, quotations, or custom drawings, email us at info@ladhanimetals.com or visit www.ladhanimetal.com.


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