Copper tube manufacturing process is divided into several kinds

At present, copper tube manufacturing can be divided into two technological processes. Traditional extrusion process: ingot casting - (cross rolling perforation) extrusion - rolling - rolling - rolling - annealing. Process New casting and rolling production process. Production process and common problems of air-conditioned refrigerated copper tube New casting and rolling production process flow chart Production process and common problems of air-conditioned refrigerated copper tube Comparison of the two production processes Several states of external supply of copper tube copper coil: currently mainly used for two main pipe, connecting pipe, pipe fittings, etc. Features: convenient transportation, users are not limited by length.

Mainly used in the maintenance market. Features: Easy to use. Straight pipe: mainly used for central air conditioning and connecting pipe. Features: Inconvenient traffic, limited length of use. Production technology and Common problems of refrigeration copper tube in air conditioning 2.1 Copper tube leakage Copper tube leakage is the fatal defect of air conditioning.

Once a leak occurs, the refrigerant for air conditioning will overflow completely. The air conditioner will fail due to lack of heat transfer medium. The causes of copper pipe leakage are more complex. The reasons for frequent leakage are described below. Manufacturing cause Eddy current flaw detection omission. The national standard stipulates that 100% eddy current testing must be carried out on copper tubes.

The diameter of artificial defects (through holes) on sample tubes used to test the flaw detector is also specified to ensure the sensitivity of eddy current testing and prevent the omission of defects exceeding the standard. This requirement can be fully guaranteed in conventional large copper pipe factories because flaw detection is online. This on-line eddy current testing ensures that all lengths of pipe are subjected to eddy current testing, i.e. 100% testing.