Introduction
Ladhani Metal Corporation is a trusted manufacturer and exporter of
precision-engineered boiler tube shields designed for erosion, abrasion, and
thermal protection. The Boiler Half Round Tube Shield is a versatile protective
component used to safeguard straight boiler tubes from wear and tear caused by
high-velocity flue gases, solid particle erosion, and temperature-induced
stresses. These shields are widely used in boilers, HRSGs, and heat exchangers
to extend the service life of tubes and reduce maintenance downtime.
What is a
Boiler Half Round Tube Shield?
A Boiler Half Round Tube Shield is a semi-cylindrical, precision-formed
protective cover that fits over the exposed section of a boiler tube. Designed
to act as a sacrificial layer, it absorbs the erosive and abrasive forces in
high-stress areas. These shields are suitable for straight tube sections and
can be installed in vertical, horizontal, or inclined tube arrangements. They
are available in various lengths, materials, and fixing methods to suit different
boiler designs and operating conditions.
Purpose
and Functionality
The primary purpose of the Boiler Half Round Tube Shield is to protect the
external surface of boiler tubes from localized damage caused by fly ash, soot,
high-temperature flue gases, and other particulate matter. By shielding the
tube, the component reduces wall thinning, prevents premature tube failure, and
ensures stable boiler performance. They can be easily attached by tack-welding
or clip-on installation for quick maintenance during scheduled outages.
Key
Features
· Semi-cylindrical profile for precise tube coverage
· High resistance to erosion, corrosion, and thermal stress
· Manufactured using CNC forming for accuracy and uniformity
· Available in a variety of heat- and corrosion-resistant alloys
· Offered in both weld-on and clip-on attachment types
· Designed for easy removal and replacement during servicing
· Suitable for various tube diameters and boiler configurations
Product
Range
|
Product Name |
Description |
|
Half Round Tube Shield |
Standard semi-cylindrical shield for
straight boiler or heat exchanger tubes. |
|
U Type Half Round Tube Shield |
Designed for U-bend tube sections to
protect from erosion and thermal stress. |
|
U Type Outer Half Round Tube Shield |
Provides outer side coverage for U-bends
exposed to high erosion. |
|
U Type Inner Half Round Tube Shield |
Protects the inner curve of tight bend
radii from wear and thinning. |
|
Half Round Tube Shield for LTSH Tube |
Made for Low Temperature Superheater
tubes susceptible to corrosion. |
|
Half Round Straight Tube Shield |
Suitable for long straight sections of
superheater or water wall tubes. |
|
Half Round Tube Shield for R/H Tube |
Built for high-temperature reheater tubes
using high-alloy materials. |
|
Half Round Tube Shield for WW Screen Tube |
Used on water wall screen tubes exposed
to direct flame and slag. |
|
Inner Tube Shield for 90 Degree Bend |
Covers the inner radius of 90° bends
prone to erosion. |
|
Outer Tube Shield for 90 Degree Bend |
Shields the outer radius of bends from
high-velocity erosion. |
|
Boiler
Tube Shields |
General protective shields for all boiler
tube layouts. |
|
Half Round Shield for Boiler Tube |
Versatile shield for both horizontal and
vertical tube arrangements. |
|
Power Plant Boiler Tube Shields |
Heavy-duty shields designed for utility
boilers in power generation. |
Boiler Half Round Tube Shields are manufactured from high-temperature and
corrosion-resistant stainless steels and alloys. 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 available 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
Boiler Half Round Tube Shields are widely used in various high-temperature and
high-wear boiler sections, including:
· Superheater tubes
· Reheater tubes
· Economizer tubes
· Water wall tubes
· Low temperature superheater sections
· High ash and high-velocity gas zones
Manufacturing
Capabilities
Ladhani Metal Corporation uses advanced CNC rolling and forming machinery to
produce dimensionally accurate half round tube shields. Products are
custom-made to client drawings or designed in-house for specific boiler
configurations. Each shield undergoes quality inspection and material
verification before dispatch.
Fixing
and Installation Options
· Tack-welded for permanent installation
· Clip-on type for quick, weld-free fitment
· Custom fastening options available upon request
Advantages
of Ladhani Metal Corporation’s Boiler Half Round Tube Shields
· Prevent tube wall thinning and rupture
· Enhance boiler operational life and reliability
· Reduce frequency of tube replacement
· Compatible with various tube diameters and arrangements
· Designed for rapid installation and removal
Conclusion
Ladhani Metal Corporation is Manufacturer, Supplier and Exporter of Boiler Half
Round Tube Shield. Our products are built to perform under the toughest boiler
operating conditions in thermal power, petrochemical, and industrial sectors.
With precision fit, robust materials, and ease of maintenance, we deliver
dependable protection for critical boiler components.
For specifications, custom sizes, or quotations, contact us at info@ladhanimetals.com or visit www.ladhanimetal.com.
Product Link :
