Connecting air conditioning copper pipes Capillary tubes are a key component commonly used in air conditioning systems. The capillary tubes regulate the flow of refrigerant through their precise diameter and length design, thereby controlling the balance of condensing pressure and evaporation pressure to ensure efficient operation of the air conditioning system. This type of pipe connection is usually made of copper because copper has good thermal conductivity and corrosion resistance and can withstand high-pressure and high-temperature environments for a long time. During installation, professional tools and techniques are required to ensure the sealing and firmness of the joints to prevent refrigerant leakage and air from entering the system.
| Normal pipe | inch | OD(mm) | Wall thickness(mm) | weight(kg/m) | |
| inch | mm | ||||
| 3/8 | 0.375 | 9.52 | 0.3 | 0.762 | 0.187 |
| 1/2 | 0.5 | 12.7 | 0.035 | 0.889 | 0.295 |
| 5/8 | 0.625 | 15.9 | 0.04 | 1.02 | 0.424 |
| 3/4 | 0.75 | 19.1 | 0.042 | 1.07 | 0.539 |
| 7/8 | 0.875 | 22.3 | 0.045 | 1.14 | 0.677 |
| 1 1/8 | 1.125 | 28.6 | 0.05 | 1.27 | 0.975 |
| 1 3/8 | 1.375 | 34.9 | 0.055 | 1.4 | 1.32 |
| 1 5/8 | 1.625 | 41.3 | 0.06 | 1.52 | 1.7 |
| 2 1/8 | 2.125 | 54 | 0.07 | 1.78 | 2.6 |
| 2 5/8 | 2.625 | 66.7 | 0.08 | 2.03 | 3.69 |
| 3 1/8 | 3.125 | 79.4 | 0.09 | 2.29 | 4.96 |
| 3 5/8 | 3.625 | 92.1 | 0.1 | 2.54 | 6.38 |
| 4 1/8 | 4.125 | 105 | 0.11 | 2.79 | 8.01 |