What is a G Type Embedded Finned Tube
The G-type finned tube is an embedded finned tube. Its core design involves machining grooves on the outer surface of a base tube and embedding metal fins into these grooves, creating a tight mechanical bond. This structure significantly improves heat transfer efficiency by increasing the heat dissipation area.
The Key Features of G Type Embedded Finned Tubes
Embedded Fin Design:
- Fins are rolled or machined into grooves on the base tube, eliminating gaps between the fin and tube.
- Prevents loosening under thermal stress or vibration.
Structure:
- Base tube: Typically a circular metal tube made of carbon steel, stainless steel, copper, or other alloys.
- Fins: Aluminum (common for corrosion resistance) or steel alloys.
The Manufacturing Process of G Type Embedded Finned Tubes
Material Preparation
- Base Tube Selection: Carbon steel, stainless steel (304/316), or seamless steel pipes are selected for their mechanical strength and compatibility with high-frequency welding.
- Fin Strip Material: Aluminum strips (0.3–1.2 mm thickness) are precision-cut to match the base tube dimensions.
Groove Machining
- Precision Grooving: A CNC-controlled lathe or milling machine cuts helical or longitudinal grooves into the base tube surface. Groove depth typically ranges from 0.3–0.8mm, matching the fin strip thickness.
Fin Strip Embedding
- Mechanical Insertion: The fin strip is wound into the pre-machined grooves using automated winding equipment, ensuring uniform spacing (±0.15mm tolerance).
Mechanical Locking
- Pressure Rolling: Hydraulic rollers apply 10–15MPa pressure to compress the base tube material around the embedded fin, creating a mechanical interlock that eliminates gaps.
The Advantages of G Type Embedded Finned Tubes
Robust Mechanical Bonding
- Cold-rolled grooves and pressure-locked fins eliminate welding, ensuring 100% metal-to-metal contact for superior durability.
High-Temperature Stability
- Operates reliably up to 450°C without thermal expansion mismatch, ideal for boilers and heat recovery systems.
Corrosion Resistance
- No welded seams reduce crevice corrosion risks; compatible with protective coatings (e.g., galvanizing) for harsh environments.
Low Maintenance
- Smooth, embedded fin design minimizes fouling and particulate accumulation, reducing cleaning frequency.
Vibration Resistance
- Mechanically interlocked fins withstand high vibration and thermal cycling without loosening.
Material Flexibility
- Supports carbon steel, stainless steel, and copper-nickel base tubes for diverse industrial needs.
Cost Efficiency
- Energy-efficient manufacturing (no welding consumables) and extended service life lower lifecycle costs.
Compact & Lightweight
- High heat transfer density per unit length enables space-saving installations in constrained environments.
The Disadvantages of G Type Embedded Finned Tubes
Base Tube Thickness Requirement
- Requires thicker base tubes (≥2mm) to withstand groove machining, limiting lightweight design flexibility.
Limited Material Pairings
- Incompatible with soft alloys (e.g., pure copper) due to deformation risks during cold-rolling.
Higher Initial Cost
- Precision CNC grooving and mechanical locking processes demand specialized equipment, raising upfront investment.
Reduced Turbulence Efficiency
- Smooth embedded fins generate less turbulence compared to serrated or welded designs, lowering heat transfer in low-flow systems.
Fin Height Restrictions
- Maximum fin height capped at ~20mm to maintain mechanical interlock integrity, limiting surface area expansion.
Repair Difficulty
- Damaged fins cannot be individually replaced; entire tube sections often require refurbishment.
Sizes and Materials of Our G Type Embedded Finned Tubes
| Base Tube Diameter | 19 to 73 mm | 3/8″ to 2.1/2″ NPS |
| Base Tube Wall Thickness | 1.5 to 8 mm | 0.05″ to 0.32″ |
| Base Tube Length | ≤32,000 mm | ≤92 ft |
| Base Tube Material | Carbon Steel (A106B, P235GH, A179, A210, A192, etc.) Alloy Steel (P5, T5, P9, T9, T11, T22, etc.) Stainless Steel (TP304, TP316, TP347, B407 800H/HT, etc.) aluminum, copper, titanium | |
| Fin Pitch | 118 to 472 FPM | 3 to 12 FPI |
| Fin Height | 5 to 20 mm | 0.19″ to 0.79″ |
| Fin Thickness | 0.4 to 1 mm | 0.01″ to 0.04″ |
| Fin Material | aluminum, copper | |
| Fin Type | G | |
For other customized requirements, please contact us.
Our Production Capacity of G Type Embedded Finned Tubes
Total six G type embedded fin tube machines, monthly production capacity is 180,000 meters in total.
G Type Embedded Finned Tubes Uses
- Power Plants: Boilers, economizers, and heat recovery systems.
- Chemical Processing: Heat exchangers in corrosive fluid transfer.
- HVAC Systems: Efficient heat dissipation in air-cooled condensers.
Comparison with Other Finned Tubes
| Type | Bonding Method | Best For |
|---|---|---|
| G-Type | Mechanically embedded | High-pressure, high-corrosion |
| L-Type | Wrapped/welded fins | Moderate-temperature systems |
| Extruded | Fins extruded from tube | Extreme thermal cycling |
Why Choose Us
- a 16-year embedded fin tube manufacturer. We are experts.
- solutions for all your needs
- the highest product quality
- the low lead times
- excellent customer service
