Correct selection of the condenser welding process is an important factor to ensure quality. In addition to the selection of welding methods, welding rods, welding locations, transportation conditions, etc., consideration of pre-welding preheating and post-welding heat treatment. Preheating and its temperature and method shall be determined according to the properties and preheating conditions of the metal material. In order to prevent welding deformation and reduce residual stress, each end of the pipe is welded to the plate in order. Each pipe needs to be welded to a evenly distributed point before welding. The size of the partition area depends on the diameter of the pipe plate, and the large pipe plate can be divided into several areas.
In order to ensure the welding quality of the condenser, the end surface of the pipe mouth and the outer round surface of the pipe end and the wall surface of the pipe plate must be purified. The impurities such as gray carbon, oil pollution, rust are first removed, and then the welded part is degreased with acetone or carbon tetrachloride, and the tube end outer circle is blown with compressed air, and its length is slightly larger than the thickness of the tube plate.