HU U-Shaped Radiant Tube – Ø152.4 × Ø142.8 × 2154.24 mm

Product Specification

HU U-Shaped Radiant Tube – Ø152.4 × Ø142.8 × 2154.24 mm
Custom High-Temperature Radiant Tube Assembly for Industrial Furnaces | FH® Alloy
FH® Alloy manufactures HU U-shaped radiant tubes for industrial furnaces and heat treatment equipment, providing custom solutions according to furnace drawings, operating temperature, atmosphere, burner configuration, and installation requirements.

This U-shaped radiant tube is manufactured from HU heat-resistant alloy with a tube size of Ø152.4 × Ø142.8 × 2154.24 mm (OD × ID × L).

The product can be supplied as a complete assembly with insulation blocks, mounting base plates, and customized installation components, making it suitable for both new furnace projects and replacement applications.

Product Specifications

Dimensions
The main tube dimensions of this project are:
Ø152.4 × Ø142.8 × 2154.24 mm

• OD – Outside Diameter: Ø152.4 mm
• ID – Inside Diameter: Ø142.8 mm
• Nominal Wall Thickness: 4.8 mm
• Length: 2154.24 mm

Other dimensions can be customized according to the furnace drawing, including:

• Center distance
• Overall height
• Straight leg length
• U-bend radius
• Mounting plate dimensions
• Mounting hole positions
• Insulation block dimensions
• Tube connection dimensions

All structural dimensions can be manufactured according to customer drawings.

HU Heat-Resistant Alloy
HU is a high-temperature heat-resistant alloy grade commonly selected for furnace components requiring good performance under elevated-temperature service.

For radiant tube applications, HU material is suitable where customers require:

• Good high-temperature strength
• Resistance to oxidation
• Good structural stability at elevated temperatures
• Resistance to repeated thermal cycling
• Reliable performance in demanding furnace environments

Its relatively high alloy content makes HU suitable for many industrial furnace applications where conventional stainless steels may not provide sufficient high-temperature service performance.
The actual service life depends on the furnace temperature, atmosphere, burner conditions, thermal cycling frequency, tube design, and operating practice.

Large-Diameter U-Shaped Design
With an outside diameter of Ø152.4 mm and a length of 2154.24 mm, this product is a relatively large U-shaped radiant tube designed for industrial furnace installations requiring a substantial radiant heating surface.
The U-shaped configuration consists of two parallel tube legs connected by a curved return section.

This structure provides:

• Longer radiant heating path
• Large effective heating surface
• Compact furnace arrangement
• Stable indirect heating
• Convenient furnace integration
• Customized center distance and bend geometry

Compared with a straight radiant tube, the U-shaped structure allows a longer heating path to be arranged within a limited furnace installation area.

Integrated Insulation Block & Mounting Base
As shown in this product configuration, the lower section of the radiant tube is assembled with high-temperature insulation blocks and a mounting base plate.

This integrated design can help:

• Support the radiant tube during installation
• Fit the furnace opening accurately
• Reduce heat loss around the installation area
• Simplify replacement and maintenance
• Provide a complete ready-to-install assembly

FH® Alloy can customize:

• Insulation block thickness
• Block dimensions
• Base plate dimensions
• Mounting hole quantity
• Mounting hole positions
• Tube spacing
• Supporting structure

This allows customers to purchase a more complete radiant tube assembly instead of only the bare tube.

Designed for Indirect Furnace Heating
U-shaped radiant tubes are commonly used in furnace systems where the heating source needs to remain separated from the furnace working chamber.
Heat generated inside the radiant tube is transferred through the tube wall and radiated into the furnace chamber.

This heating arrangement can help provide:

• Controlled furnace atmosphere
• Reduced direct flame contact
• Uniform heat distribution
• Stable furnace temperature
• Reliable continuous operation

Typical Applications
HU U-shaped radiant tubes can be used in:

• Heat treatment furnaces
• Annealing furnaces
• Hardening furnaces
• Tempering furnaces
• Carburizing furnaces
• Continuous furnaces
• Roller hearth furnaces
• Protective atmosphere furnaces
• Steel processing lines
• Industrial heating equipment

They are particularly suitable for furnace systems requiring large-diameter, high-temperature U-shaped radiant tubes.

Manufacturing Process
Depending on the drawing and structural design, the manufacturing process may include:
Material Preparation → Tube Production → U-Bend / Elbow Preparation → Assembly → Welding → Machining → Mounting Plate Fabrication → Insulation Assembly → Dimensional Inspection → Final Inspection

For this type of large radiant tube, FH® Alloy focuses on:

• Tube diameter accuracy
• Wall thickness consistency
• Tube straightness
• Center distance
• U-bend geometry
• Weld quality
• Overall dimensional accuracy
• Mounting plate alignment
• Insulation block fit

These details directly influence installation accuracy and long-term furnace performance.

Key Product Advantages
HU Heat-Resistant Alloy
Suitable for demanding high-temperature industrial furnace service.
Large Ø152.4 mm Tube Diameter
Provides a substantial radiant heating surface for industrial heating applications.
2154.24 mm Long Structure
Suitable for large furnace installations requiring extended radiant heating sections.
4.8 mm Nominal Wall Thickness
Based on the specified Ø152.4 mm OD and Ø142.8 mm ID.
Complete Assembly Supply
Can be supplied with insulation blocks, mounting plates, and supporting components.
Custom Manufacturing
Center distance, bend radius, mounting structure, and overall dimensions can all be customized.
Replacement Production
Suitable for reproduction of existing furnace radiant tubes based on drawings or samples.

Quality Control
Depending on project requirements, inspection can include:

• Material verification
• Chemical composition analysis
• Outside and inside diameter inspection
• Wall thickness measurement
• Overall length inspection
• Center distance inspection
• Weld inspection
• Bend geometry inspection
• Mounting plate inspection
• Final assembly inspection

Special inspection requirements can be agreed before production.

Why Choose FH® Alloy?
FH® Alloy specializes in custom heat-resistant alloy components for industrial furnaces and heat treatment equipment.

Our radiant tube product range includes:

• HU U-Shaped Radiant Tubes
• Cr25Ni35 U-Shaped Radiant Tubes
• I-Shaped Radiant Tubes
• P-Type Radiant Tubes
• Straight Radiant Tubes
• Gas-Fired Radiant Tubes
• Special-Shaped Bent Radiant Tubes
• Custom Furnace Radiant Tube Assemblies

We also manufacture furnace rollers, centrifugal cast tubes, heat treatment fixtures, furnace trays, baskets, and other heat-resistant furnace components.

Request a Quote
For an accurate quotation, please provide:

1. Product drawing
2. Material grade
3. Outside diameter
4. Inside diameter or wall thickness
5. Overall length
6. Center distance
7. U-bend radius
8. Mounting plate dimensions
9. Operating temperature
10. Furnace atmosphere
11. Required quantity

Send your drawing or existing radiant tube specifications to FH® Alloy for technical review and quotation.

FAQ
Q1: Can you manufacture Ø152.4 × Ø142.8 × 2154.24 mm U-shaped radiant tubes?
Yes. FH® Alloy can manufacture this HU U-shaped radiant tube specification and can also customize dimensions according to the customer's furnace design.

Q2: What is the wall thickness of this tube?
Based on an outside diameter of Ø152.4 mm and inside diameter of Ø142.8 mm, the nominal radial wall thickness is 4.8 mm.

Q3: Can the center distance be customized?
Yes. Center distance, straight leg length, bend radius, overall height, and installation dimensions can all be customized.

Q4: Can you supply the insulation blocks and mounting plate together?
Yes. The radiant tube can be supplied as a complete assembly with insulation blocks, mounting plates, and related installation components.

Q5: Can HU be replaced with another alloy?
Yes. Material can be selected according to the operating temperature, furnace atmosphere, heating method, and expected service life.

Q6: Can you manufacture replacement radiant tubes?
Yes. Replacement production can be based on the original drawing, existing sample, product photographs, or measured dimensions.