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Zhejiang Jingliang Copper-Tube Products Co., Ltd

Wholesale Inner Grooved Copper Tubes

Inner Grooved Copper Tubes

-- Steady & Reliable Manufacturer --

Introduction to High-Efficiency Heat Transfer

Inner grooved copper tubes represent the pinnacle of modern heat exchange technology. Unlike smooth-bore tubes, these specialized pipes feature a helical screw-thread pattern on the inner wall. This internal geometry is specifically designed to increase the internal surface area and create turbulence in the refrigerant flow. By breaking the boundary layer of the fluid, these tubes significantly enhance the evaporation and condensation heat transfer coefficients. As the global HVAC industry moves toward more compact units and environmentally friendly refrigerants with different thermal properties, the demand for precision-engineered inner grooved tubing has surged. Our manufacturing process utilizes advanced floating plug drawing techniques to ensure that every micro-groove is consistent in depth, angle, and pitch, providing our clients with the highest thermal efficiency available in the market today.

The transition from smooth tubes to inner grooved tubes has been a game-changer for manufacturers of high-efficiency air conditioners and heat pumps. In a typical heat exchanger, the refrigerant side usually offers the highest resistance to heat transfer. By introducing internal fins or grooves, we can increase the internal surface area by 1.5 to 2 times compared to a plain tube. This allows for a reduction in the overall size of the heat exchanger while maintaining the same cooling or heating capacity. Furthermore, our inner grooved tubes are compatible with the latest generation of refrigerants, including R32, R410A, and natural refrigerants like CO2 (R744). We focus on the "wetting" capability of the inner surface, ensuring that the liquid refrigerant film is distributed evenly, which prevents "dry spots" that can lead to efficiency losses. For large-scale manufacturers, choosing our inner grooved tubes means choosing a product that has been rigorously tested for grain size consistency and mechanical strength, ensuring that the tubes can withstand the high pressures of modern eco-friendly cooling cycles without compromising on longevity or safety.

Comprehensive Technical Specifications

ParameterDetailed Value / Range
Material CompositionC12200 (Cu-DHP), Phosphorus 0.015-0.040%
Outer Diameter (OD)5.0mm, 6.35mm (1/4"), 7.0mm, 7.94mm (5/16"), 9.52mm (3/8")
Bottom Wall Thickness0.25mm to 0.45mm (Ultra-thin options available)
Groove Height (Fin Height)0.10mm to 0.25mm (High-fin specialized designs)
Groove Number20 to 65 (Depending on OD and pitch)
Helix Angle15° to 30° (Optimized for specific refrigerants)
Tensile StrengthMin 245 MPa
ElongationMin 40%
Expansion RateExpands to 40% of OD without cracking

Industrial and Commercial Applications

Inner grooved copper tubes are primarily utilized in high-performance heat exchange environments. Their most common application is in the production of evaporator and condenser coils for residential air conditioning units (RAC) and commercial air conditioning systems (CAC). In these systems, the increased surface area allows for much higher SEER (Seasonal Energy Efficiency Ratio) ratings, which is a critical selling point for modern appliances. Beyond standard AC units, these tubes are vital in the manufacturing of Air-to-Water heat pumps, which are becoming the standard for sustainable home heating in Europe and North America. In the industrial sector, they are used in large-scale chillers for data centers, where heat rejection efficiency directly impacts operational costs. They are also increasingly found in automotive thermal management systems, particularly for Electric Vehicle (EV) battery cooling and cabin climate control, where space is at a premium and weight reduction is essential.

Strategic Advantages of Inner Grooved Design

The primary advantage of our inner grooved tubing is the dramatic improvement in thermal efficiency, often reaching 20-30% higher than smooth tubes. This efficiency leads to secondary benefits, such as the ability to design smaller, lighter units that require less refrigerant charge—a major cost saver for OEMs. From a manufacturing perspective, our tubes offer excellent workability. Despite the complex internal structure, the outer surface remains smooth, allowing for easy compatibility with standard fin-pressing and tube-expanding machinery. We use a bright annealing process in a controlled atmosphere to ensure the tubes remain clean and oxidation-free, which is crucial for maintaining the integrity of the refrigerant circuit. Our quality control includes 100% Eddy Current Testing (ECT) to detect any internal or external defects, ensuring that every meter of tubing delivered to your factory is reliable and ready for high-speed automated assembly.

Payment Terms and International Shipping

We offer a variety of payment structures to suit the needs of international buyers. For new customers, we typically operate on a T/T basis (30% deposit and 70% against the copy of the Bill of Lading) or an irrevocable Letter of Credit (L/C) at sight. For long-term partners and established OEMs, we are open to discussing DP (Documents against Payment) or open account terms based on credit insurance approvals. Regarding shipping, our Inner Grooved tubes are most commonly shipped in Level Wound Coils (LWC) to facilitate automated production. Each coil is securely strapped to a wooden pallet (eye-to-sky or eye-to-wall) and protected by a robust shrink-wrap layer and moisture-absorbing silica packets. We handle full container loads (FCL) through Ningbo and Shanghai ports, ensuring that the transit time is minimized. Our logistics team provides full documentation including Mill Test Certificates (EN 10204 3.1), Certificates of Origin, and detailed packing lists to ensure smooth customs clearance in the destination country.

  • Q: What is the benefit of a higher helix angle in the grooves?
  • A: A higher helix angle increases the turbulence of the refrigerant, which generally enhances the heat transfer coefficient. However, it also increases pressure drop. Our engineers can help you choose the optimal angle (usually between 18° and 25°) based on your specific compressor and refrigerant type.
  • Q: Can you produce ultra-thin wall inner grooved tubes?
  • A: Yes, we have specialized in "thin-wall" technology, offering bottom walls as thin as 0.25mm. This reduces the weight of the copper used in the heat exchanger, providing significant cost savings without compromising the pressure rating.
  • Q: How do you handle the ends of the LWC coils?
  • A: All coils are capped with high-quality plastic plugs to ensure the internal grooves remain clean and dry during transport and storage.
ABOUT US
30+YEARS OF
EXPERIENCE
About Us

A Reliable Partner of the Copper Tube Industry

Zhejiang Jingliang Copper-Tube Products Co., Ltd is China Inner Grooved Copper Tubes and Inner Grooved Copper Tubes Factory, which established in 1994, has been deeply involved in the copper tube industry for over three decades. The company primarily produce various specifications of products such as copper tubes, brass tubes, copper square tubes, fin copper tubes, copper capillary tubes, condenser copper tubes, copper evaporator tubes, and conductive rods, which are of quality and have earned the trust and acclaim of customers both domestically and internationally.

Wide Applications:

These products are widely used in various fields including air conditioning, refrigeration, heat exchange, sanitary ware, automotive, machinery, electric furnaces, and chemical industries.

Convenient Transportation:

Strategically located in Tangpu Town, renowned as the “home of copper tubes” in East China. Our company enjoys a prime location, adjacent to the Shangsan Expressway and National Highway 104, and is conveniently situated just over 70 kilometers from Hangzhou and Ningbo, ensuring easy accessibility and a business position.

Strong Financial Resources:

With its strong financial resources and advanced copper tube processing technology, our company holds an advantageous position in market share, brand value, technological content, and product quality, becoming a preferred supplier for many listed groups.

Large Scale Production:

The company occupies an area of over 20,000 square meters, with a construction area of 12,800 square meters. In 2022, our annual production exceeded 7,500 tons, with a value output of up to 450 million yuan, demonstrating our strong production capacity and market competitiveness.

Comprehensive Industry Chain:

Jingliang has now developed into a complete industrial chain integrating smelting, extrusion, drawing, precision rolling, and annealing. It has been awarded multiple honors, including "Top Ten Copper Tube Enterprises" and "Leading Taxpayer in the Copper Tube Industry".

Smart Manufacturing:

Jingliang Copper-Tube Products will better integrate the concept of factory construction into its corporate development strategy, insist on refining technology and polishing products more finely, and the future of "intelligent manufacturing".

Genuine Cooperation:

Zhejiang Jingliang Copper-Tube Products Co.,Ltd warmly welcomes friends from all walks of life to visit and offer guidance. We look forward to joining hands with you to create a brilliant future together.

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