what is inner grooved copper tube?

inner grooved copper tubeIntroduction：

Internal threads are threads machined inside a pipe, hole or other component, usually used to mate with external threaded components.

                   inner grooved copper tube

Internal thread structure: The outer surface of the inner grooved copper tubeis smooth, and the inner surface has a certain number of regular threads. These threads can be in different shapes such as mountain teeth, ladder grooves, top angles, and fine high teeth, and also include high and low tooth shapes, tooth top slots, and double rotation directions.

2.inner grooved copper tubeimplementation standard：

Product implementation standards: GB/T 17791-2007, ASTM B280, JIS H3300, AS/NZS 1571:1995, AS 1432, EN12735-2

3.inner grooved copper tubeform：

Common types of internal threads include:

Metric internal threads: formulated according to international metric standards, usually indicated by "M" (such as M10, M12, etc.).

Inch internal threads: formulated according to English standards, usually indicated by "UNC" or "UNF" (such as 1/4-20 UNC).

Common English internal thread pipe size table:

 Metric internal threaded pipes are generally represented by M, such as M2, which represents a thread with a nominal diameter of 2mm. Its common specifications are as follows:

inner grooved copper tubechemical composition:

inner grooved copper tubephysical properties:

1. Outstanding heat transfer performance

The inner wall of the internally threaded copper tube has spiral teeth, which greatly increases the surface area of ​​the inner wall, increasing the heat transfer area by 20% - 30% compared with ordinary light tubes. When the refrigerant flows in the tube, the internal thread causes the fluid to flow in a spiral shape, destroys the laminar boundary layer, enhances the degree of turbulence, makes the heat transfer between the refrigerant and the tube wall more complete, significantly improves the heat transfer coefficient, and can increase the heat transfer efficiency by 30% - 50%.

2. Significant energy saving effect

Due to its efficient heat transfer performance, less energy input is required to achieve the same cooling or heating effect. Taking air conditioners as an example, air conditioners using internally threaded copper tubes save 15% - 25% energy, and long-term use can save users a lot of electricity bills.

3. Good pressure resistance

The copper tube itself has high strength, and the internal thread structure can also enhance the pressure resistance to a certain extent, and can withstand higher refrigerant pressure, which is generally 10% - 20% higher than ordinary light tubes, ensuring the safe and stable operation of the refrigeration system.

4. Strong corrosion resistance

Copper has good corrosion resistance, and a dense oxide film will form on the surface of the internally threaded copper tube, further enhancing the corrosion resistance. Under normal use, the service life can reach 15-20 years.

Production process of internal thread copper tube:

1. Billet tube manufacturing

Smelting and casting: Put the copper raw material (such as electrolytic copper) into the furnace, control the temperature to melt at 1100-1200℃, add other elements as needed, remove impurity gases, and use a continuous casting machine to cast copper tube billets.

Rolling processing: After heating the copper tube billet, it is rolled through a rolling mill to reduce the outer diameter and wall thickness, improve the internal structure and mechanical properties.

Drawing and sizing: Clean and lubricate the rolled copper tube, and further reduce the size to the required accuracy through the drawing die.

2. Internal thread forming

Spinning: Fix the copper tube on the spinning equipment, and use the spinning tool to rotate and pressurize to make the inner wall plastically deformed to form high-precision threads.

Planetary rolling: In the planetary rolling equipment, the copper tube is rolled and rolled by multiple planetary rollers and moved axially to form threads, which is suitable for large-scale production.

3. Post-processing

Cleaning: Remove impurities on the surface of the copper tube by soaking in chemical liquid or ultrasonic cleaning.

Annealing: Put the copper tube into the annealing furnace, control the temperature according to the material specifications, and eliminate residual stress.

Inspection and packaging: Inspect the size, surface, mechanical properties, etc., and qualified products are packaged in films and cartons.

inner grooved copper tubeapplication areas:

1. Air conditioning field: Widely used in the evaporator and condenser of air conditioners, it can improve the cooling and heating efficiency of air conditioners, reduce energy consumption, achieve energy-saving effects, and make air conditioners smaller and lighter.

2. Refrigeration equipment: In refrigeration systems such as refrigerators, freezers, and cold storage, internally threaded copper tubes help improve refrigeration efficiency, quickly reduce temperatures, and can better adapt to different refrigerants, improving the performance and reliability of refrigeration equipment.

3. Heat exchangers: In various heat exchangers, such as automobile radiators, oil coolers, and heat exchange equipment in industrial production, internally threaded copper tubes can effectively transfer and exchange heat, improve heat exchange efficiency, and optimize system performance.

4. Other fields: It can also be used in some fields that require efficient heat transfer and pressure resistance, such as solar water heaters, heat pump systems, chemical pipelines, etc.

Thank you for reading the article. I hope it can help you. If you need anything, you can contact us at any time.