Inner grooved copper tube is specially designed for high-efficiency heat exchangers used in air conditioning and refrigeration systems. The internal spiral grooves increase the surface area and create turbulence in refrigerant flow, significantly improving heat transfer performance.
Compared with smooth copper tubes, inner grooved copper tubes can increase heat transfer efficiency by 20–30% or more, making them ideal for modern energy-efficient HVAC equipment.
Hongtai manufactures high-precision inner grooved copper tubes that comply with international standards such as:
GB/T20928
EN12735
ASTM B280
They are widely used in condensers, evaporators, and heat exchanger coils.
20%–30% Higher Thermal Conductivity: Internal grooves increase surface area and significantly boost heat transfer efficiency.
Superior Refrigeration Performance: Optimized flow structure enhances refrigerant turbulence and system cooling efficiency, a key benefit of using inner grooved copper tube.
Energy-Saving & High Efficiency: Better heat exchange helps reduce energy consumption and overall operating costs, aligning with the sustainable solutions provided by HONGTAI COPPER.
High Precision & Stable Quality: Advanced manufacturing of our copper tube wholesale ensures uniform grooves, consistent performance, and strong durability, which are hallmarks of premium inner grooved copper tube, and these qualities are maintained in our premium pancake copper coil products.
Easy Processing & Installation: Excellent bendability and weldability improve construction efficiency.
| Serial number | Specification | Outer diameter D/mm | Inner diameter d/mm | Bottom wall thickness TW/mm | Tooth height Hf/mm | Total wall thickness TWT/mm | Tooth tip angleα | Helix Angle β/° | Number of threads n/strip |
| 1 | φ7.00×0.27＋0.15-53-18 | 7 | 6.16 | 0.27 | 0.15 | 0.42 | 53 | 18 | 60 |
| 2 | φ7.00×0.25＋0.18-40-18 | 7 | 6.14 | 0.25 | 0.18 | 0.43 | 40 | 18 | 50 |
| 3 | φ7.00×0.25＋0.22-22-16 | 7 | 6.06 | 0.25 | 0.22 | 0.47 | 22 | 16 | 54 |
| 4 | φ9.52×0.28＋0.15-53-18 | 9.52 | 8.66 | 0.28 | 0.15 | 0.43 | 53 | 18 | 60 |
| 5 | φ9.52×0.30＋0.20-53-18 | 9.52 | 8.52 | 0.3 | 0.2 | 0.5 | 53 | 18 | 60 |
| 6 | φ9.52×0.27＋0.16-30-18 | 9.52 | 8.66 | 0.27 | 0.16 | 0.43 | 30 | 18 | 70 |
| Note: Calculation method for inner diameter: d=D -2 × TWT | |||||||||
Each copper tube undergoes strict quality control procedures:
Eddy current testing
Dimensional inspection
Chemical composition testing
Surface inspection
Inner grooved copper tubes are produced using precision rolling and groove forming technology. During production, the internal surface of the copper tube is pressed with spiral grooves to achieve uniform groove depth and pitch.
This process ensures:
high dimensional accuracy
stable groove geometry
excellent heat transfer performance.
Packaging
Plastic caps on both ends
Packed in wooden pallets or cartons
Export-standard packaging
Delivery
Standard lead time: 15-25 days
OEM customization supported
Focus on Copper Tube Manufacturing Since 1993
Advanced continuous casting and rolling production lines
Annual Production Capacity 100000 Tons
Exported to 30+ countries
OEM and custom production available
