1. Classification by production process
1. **Seamless copper tube**
Seamless copper tube is made by heating copper billet to melting point and then extruding it. This copper tube has a smooth interior and no obvious weld joints, so it has excellent thermal conductivity and high mechanical strength. Seamless copper tubes are widely used in heat exchangers, refrigeration equipment, air conditioning systems and other fields that require high thermal conductivity.
2. **Welded copper tube**
Welded copper tube is made of copper strip or copper plate through curling, welding and other processes. This type of copper tube has good corrosion resistance and thermal conductivity, and the production process is relatively simple and the cost is low. It is often used in petrochemical, pharmaceutical, shipbuilding and other fields to meet the dual needs of these industries for pipeline corrosion resistance and economy.
3. **Spiral seam copper tube**
Spiral seam copper tube is also a type of welded copper tube, which is characterized by curling the copper strip into a spiral and welding it. The production process of this type of copper tube is simpler and the price is more affordable, so it is often used in water supply pipes, HVAC systems and other occasions with certain cost requirements.
Direct supply from copper tube manufacturers
### 2. Classification by material and purity
1. **Ordinary copper tube**
Ordinary copper tubes mainly include T1, T2, T3 and other grades. The purity of these copper tubes decreases in sequence, 99.95%, 99.90% and 99.70% respectively. They have good electrical conductivity, thermal conductivity and plasticity, and are ideal materials for making conductive and thermal conductive equipment.
2. **Oxygen-free copper tube**
Oxygen-free copper tubes such as TU1 and TU2 have extremely low oxygen content, even reaching high purity or vacuum oxygen-free state. This type of copper tube has higher electrical conductivity and thermal conductivity, and is widely used in high-end fields such as electricity, electronics, and communications.
3. **Deoxidized copper tube**
Deoxidized copper tubes such as TP1 and TP2 are made by removing oxygen molecules from copper through a special process. This type of copper tube has good processing and welding properties while maintaining high electrical and thermal conductivity, and is widely used in automobile manufacturing, shipbuilding and other industries.
4. **Special copper tube**
Special copper tube refers to a tube made by adding a small amount of alloy elements (such as arsenic, tellurium, silver, etc.) to copper. This type of copper tube has special physical and chemical properties, such as higher strength, better corrosion resistance or better processing performance. They are used in some special fields, such as aerospace, nuclear industry, etc.
### 3. Other types of copper tubes
In addition to the above-mentioned copper tubes classified by production process and material, there are some special types of copper tubes, such as tin bronze copper tubes, aluminum bronze copper tubes, etc. These copper tubes add alloy elements such as tin and aluminum to copper, so that they have higher strength, better wear resistance and corrosion resistance. They are widely used in machinery manufacturing, marine engineering and other fields.
Customized processing of copper tubes
### Summary
In summary, copper tubes can be divided into many types according to factors such as production process, material and purity. Each type of copper tube has its own unique performance and application range. When choosing a copper tube, it is necessary to make comprehensive considerations based on the specific application scenarios and needs to ensure that the selected material can meet the actual use requirements.
