Introduction
Ladhani Metal Corporation is a trusted manufacturer and global supplier of premium-quality tube shields engineered for the protection of boiler and heat exchanger tubes operating under extreme conditions. Among our advanced product lineup, the U Type Half Round Tube Shield stands out for its specialized design to protect U-bend sections of tubes, which are highly susceptible to thermal stress, erosion, and high-velocity gas impingement in power generation and process industries.

What is a U Type Half Round Tube Shield?
A U Type Half Round Tube Shield is a custom-formed protective cover fabricated in a semi-cylindrical "U" configuration. It is specifically designed to shield the outer and inner surfaces of U-bend boiler tubes—areas most exposed to flue gas erosion and flow turbulence. These shields are widely used in superheaters, economizers, and reheaters of industrial boilers and heat exchangers to ensure prolonged tube life and operational reliability.

Purpose and Functionality
The U Type Half Round Tube Shield serves as a sacrificial barrier that absorbs wear, oxidation, and corrosion caused by high-velocity gases, ash particles, and temperature fluctuations in U-bend zones. By shielding these critical regions, the shield helps prevent thinning, cracking, and premature failure of pressure-retaining components. These shields are easy to install and replace during scheduled maintenance, significantly reducing long-term maintenance and replacement costs.

Key Features

· Specially formed for U-bend tube profiles
· High-precision fitment to curved sections
· Superior resistance to thermal cycling and flue gas erosion
· Manufactured using SS 304, SS 316, SS 310, and heat-resistant alloys
· Customizable radius, arc length, and segment dimensions
· Compatible with clip-on and tack-welded installation methods
· Suitable for horizontal, vertical, and inclined bend sections

Product Range

Material Grades Offered by Ladhani Metal Corporation

We manufacture U Type Half Round Tube Shields using a wide range of materials suited to high-temperature and corrosive environments. Our standard and custom offerings include:

· Stainless Steel 304 / 304L
· Stainless Steel 316 / 316L
· Stainless Steel 310 / 310S
· Stainless Steel 410 / 420 / 430
· Cr25Ni20, 1Cr25Ni20Si2
· Cr23Ni13, 1Cr20Ni14Si2
· Other high-chromium and nickel-based alloys

Each material is selected based on customer requirements, service temperature, flue gas composition, and expected mechanical load.

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

1Cr13
• Carbon (C): 0.15 – 0.20%
• Silicon (Si): ≤ 0.60%
• Manganese (Mn): ≤ 0.60%
• Phosphorus (P): ≤ 0.035%
• Sulfur (S): ≤ 0.030%
• Chromium (Cr): 12.0 – 14.0%
• Iron (Fe): Balance

Stainless Steel 304
• Carbon (C): ≤ 0.08%
• 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 – 10.5%
• Iron (Fe): Balance

Stainless Steel 304L
• Carbon (C): ≤ 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
• Carbon (C): ≤ 0.08%
• 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 316L
• Carbon (C): ≤ 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
• Carbon (C): ≤ 0.25%
• 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 310S
• Carbon (C): ≤ 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

U Type Half Round Tube Shields are used extensively in:

· U-bend superheater and reheater tubes
· Economizer return bends
· Waste heat recovery boiler bends
· HRSG systems in combined-cycle plants
· Refineries and chemical process heater loops
· Biomass and waste incinerator boiler U-bends

Manufacturing Capabilities
Ladhani Metal Corporation uses precision rolling and forming machinery to manufacture U Type shields with exact radii and bend angles. We offer custom solutions with tight tolerances, high surface finish, and repeatable consistency across batches. Both small and bulk orders are supported with short lead times.

Fixing and Installation Options

Our U Type Half Round Tube Shields can be installed using:

· Tack Welding – Spot-welded for permanent installation on both sides of the shield
· Clip-On Fixing – Secured using stainless steel or spring steel clips for fast, non-permanent mounting
· Custom Wrap Designs – Clamping or hybrid solutions for difficult-to-access U-bend configurations

Conclusion
Ladhani Metal Corporation is Manufacturer, Supplier and Exporter of U Type Half Round Tube Shield. Our U Type Half Round Tube Shields are engineered for high-performance environments where bend protection is critical. Whether you require protection for superheater return loops or economizer bends, our shields deliver consistent performance, safety, and durability.

For detailed inquiries or technical consultation, contact us at info@ladhanimetals.com or visit www.ladhanimetal.com.

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