FH® Custom Bent Radiant Tube Manufacturer | Shaped Radiant Tubes for Industrial Furnaces

Custom Welded Steel Radiant Tube for Industrial Furnace Heating Systems

Product Overview
FH® SS400 + Q235 Serpentine Bent Radiant Tube is a fabricated multi-pass heating tube system designed for industrial furnace applications requiring cost-effective structural steel solutions.
Unlike high-alloy radiant tubes, this model uses SS400 and Q235 carbon steel materials, making it suitable for:

• Medium-temperature furnace environments
  
• Structural heating systems
  
• Non-extreme oxidation conditions
  
• Cost-sensitive industrial heat treatment lines
  

The serpentine geometry significantly increases the heating surface area while maintaining a compact installation footprint.

Key Features & Advantages
1. Cost-Effective Industrial Heating Solution
Using SS400 + Q235 steel reduces material cost while maintaining structural integrity for medium-temperature applications.
2. Multi-Pass Serpentine Heat Distribution
The bent configuration maximizes heat exchange length, ensuring:

• More uniform heating
  
• Reduced hot spots
  
• Improved furnace efficiency
  

3. Strong Welded Structure Design
All bends and joints are precision welded with visible reinforced bead structure (as shown in image), ensuring:

• Structural stability
  
• Vibration resistance
  
• Long-term mechanical strength
  

4. Custom Engineering Manufacturing
FH® provides full customization based on furnace layout:

• Serpentine / S-type / multi-loop design
  
• Inlet/outlet positioning
  
• Base frame integration
  
• Tube diameter and wall thickness
  

5. Easy Maintenance & Installation
Modular welded construction allows:

• Faster replacement
  
• Simplified furnace integration
  
• Lower downtime cost
  

Technical Specifications

Material Explanation (SS400 + Q235)
This structure uses widely available industrial carbon steels:

• SS400 (Japan standard structural steel)
  Good weldability and general structural strength.
  
• Q235 (China structural carbon steel)
  Excellent cost-performance ratio and fabrication flexibility.
  

This combination is ideal for non-extreme thermal furnace environments where alloy steel is not required.

Application Areas
FH® SS400 + Q235 serpentine radiant tubes are widely used in:

• Low & medium temperature heat treatment furnaces
  
• Preheating systems
  
• Industrial drying furnaces
  
• Continuous production heating lines
  
• Structural furnace equipment assemblies
  
• Custom OEM furnace projects
  

Manufacturing Capability (FH® Factory)
FH® specializes in industrial furnace components with:

• CNC cutting & precision bending
  
• Heavy-duty welding (full penetration welds)
  
• Jig-controlled assembly for geometry accuracy
  
• Dimensional inspection before delivery
  
• Optional stress relief treatment
  

Quality Control
Each unit undergoes:

• Weld seam inspection (visual + optional NDT)
  
• Dimensional tolerance check
  
• Load-bearing verification
  
• Installation fit-up test (if required)
  

OEM / Custom Furnace Engineering
We support furnace manufacturers and EPC contractors with:

• Custom serpentine layout design
  
• Integration with furnace chamber drawings
  
• Material upgrade suggestions (SS400 → alloy upgrade if needed)
  
• Rapid prototype manufacturing
  
• Batch production for furnace projects
  

Genuine Photos of FH® Special Bent Radiant Tubes


FAQ
Q1: What is a serpentine radiant tube used for?
A: It is used to distribute heat evenly in industrial furnaces using a multi-pass structure instead of a straight heating path.

Q2: Is SS400 + Q235 suitable for high temperature furnaces?
A: It is suitable for medium and low temperature applications, not recommended for extreme high-temperature oxidizing environments.

Q3: Can FH® customize the shape?
A: Yes, FH® provides full OEM design based on furnace drawings or layout requirements.

Q4: What industries use this product most?
A: Metal processing, heat treatment equipment manufacturers, and general industrial furnace systems.