Straight Radiant Tube Manufacturer | Custom Furnace Radiant Tubes | FH® Alloy

Product Specification

Straight Radiant Tube for Industrial Furnaces
Custom Flange-Mounted Radiant Tubes | OEM Manufacturing | FH® Alloy

FH® Alloy manufactures straight radiant tubes for industrial furnaces and heat treatment equipment, providing custom solutions for indirect heating systems used in a wide range of thermal processing applications.

Straight radiant tubes are widely used in furnace systems that require stable heat transfer, controlled furnace atmosphere, convenient installation, and reliable high-temperature performance. We support drawing-based manufacturing, replacement production, and custom material selection according to the customer's actual operating conditions.

Product Overview
The straight radiant tube features a cylindrical tube body with customized end connections, usually combined with square flanges, round flanges, or other mounting structures according to furnace design.

Compared with bent radiant tubes, straight radiant tubes offer a simpler structure and are suitable for furnace systems that require:

• Indirect heating
• Easy installation and maintenance
• Stable structural support
• Flange-mounted connection
• Custom replacement for existing furnace tubes

FH® Alloy can manufacture straight radiant tubes according to drawings, samples, photos, or measured dimensions.

Typical Specifications

Key Features
Straight Structure
The simple tube design is suitable for many industrial furnace heating systems and is convenient for installation and replacement.
Custom Flange Connection
Flange shape, size, hole position, and mounting dimensions can be customized according to furnace requirements.
Heat-Resistant Material Options
Different alloy grades are available based on working temperature, furnace atmosphere, and service conditions.
Stable Fabrication Quality
Attention is given to tube straightness, wall thickness consistency, flange alignment, and weld quality.
OEM & Replacement Manufacturing
Suitable for both new furnace projects and replacement of existing radiant tubes.

Material Options
Material selection plays an important role in the performance and service life of radiant tubes.

FH® Alloy can supply straight radiant tubes in different materials according to the operating conditions, including:

• 1.4848
• 1.4849
• 1.4852
• 2.4879
• Heat-resistant stainless steels
• High-chromium alloys
• High-nickel alloys
• Nickel-based high-temperature alloys
• Other customer-specified materials

If you are not sure which material is suitable, we can recommend the appropriate alloy based on:

• Operating temperature
• Furnace atmosphere
• Heating method
• Thermal cycling frequency
• Service life expectations
• Structural design requirements

Straight Radiant Tube Dimensions
Straight radiant tubes can be customized according to the furnace layout and installation requirements.

Typical dimensional parameters include:

• OD – Outside Diameter
• WT – Wall Thickness
• L – Overall Length
• FD – Flange Dimension
• FT – Flange Thickness
• ID – Inner Diameter
• Connection Length
• Mounting Hole Position

Drawing Reference
OD = Outside Diameter
WT = Wall Thickness
L = Overall Length
FD = Flange Dimension
FT = Flange Thickness
All dimensions can be manufactured according to customer drawings or samples.

Applications
Straight radiant tubes are suitable for a variety of furnace and thermal processing systems, including:

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

They are especially suitable for systems requiring indirect heating with straight-tube installation and flange-mounted support.

Manufacturing Process
Depending on the product design, the manufacturing process may include:
Material Preparation → Tube Forming / Casting → Machining → Flange Fabrication → Welding → Assembly → Dimensional Inspection → Surface Cleaning → Final Inspection

For straight radiant tubes, FH® Alloy focuses on:

• Tube straightness
• Wall thickness consistency
• Flange machining accuracy
• Hole position accuracy
• Weld quality
• End connection fit
• Overall dimensional tolerance

These details directly affect installation accuracy and service life.

Product Advantages

• Suitable for indirect furnace heating
• Flexible flange and connection design
• Custom dimensions available
• Multiple heat-resistant material options
• Suitable for OEM and replacement projects
• Reliable production and export supply

Quality Control
Depending on customer requirements, inspection can include:

• Chemical composition verification
• Dimensional inspection
• Wall thickness inspection
• Flange dimension inspection
• Hole position inspection
• Visual inspection
• Weld inspection
• Surface inspection

Additional inspection requirements can be confirmed before production.

Why Choose FH® Alloy?
FH® Alloy specializes in custom furnace components and heat-resistant alloy products for industrial heating and heat treatment applications.

Our main products include:

• Straight radiant tubes
• U-shaped radiant tubes
• I-shaped radiant tubes
• P-type radiant tubes
• Special-shaped bent radiant tubes
• Furnace rollers
• Heat treatment fixtures
• Furnace trays and baskets
• Centrifugal cast tubes
• Other custom furnace accessories

We support OEM production, drawing-based manufacturing, and customized material solutions for overseas customers.

Request a Quote
If you need a custom straight radiant tube, please send us the following information:

1. Product drawing or sketch
2. Tube outside diameter
3. Wall thickness
4. Overall length
5. Flange dimensions
6. Mounting hole details
7. Material grade
8. Operating temperature
9. Furnace atmosphere
10. Required quantity
11. Send your drawing to FH® Alloy for technical review and quotation.

FAQ
Q1: Can you manufacture straight radiant tubes according to our drawing?
Yes. FH® Alloy supports custom manufacturing based on drawings, samples, and dimensional information.

Q2: Can the flange design be customized?
Yes. Flange shape, dimensions, thickness, and hole positions can all be customized.

Q3: What materials do you offer?
We can provide 1.4848, 1.4849, 1.4852, 2.4879, heat-resistant stainless steels, high-Ni alloys, and other suitable materials.

Q4: Can you produce replacement radiant tubes for existing furnaces?
Yes. We can manufacture replacement tubes according to old drawings, samples, or measured dimensions.

Q5: How do we choose the right material?
Please provide your furnace temperature, atmosphere, and service conditions. We can recommend a suitable material based on your application.