Equipment manufacturing
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For tube and tube heat exchangers, what are the benefits of internal hole welding between tube plates?
The inner hole welding between the tube plates of the tube heat exchanger is a butt welding between the heat exchange tube and the tube plate. The heat exchange tube does not have to extend into the tube plate hole, which can eliminate the gap corrosion between the tube plate hole and the heat exchange tube.
Can eliminate gap corrosion between tube plate holes and heat exchange tubes
This post was last edited by jia717 on 2009-9-4 08:38 Internal hole welding is to arrange the weld between the heat exchange tube and the tube sheet on the shell side of the tube sheet. During welding, the welding gun must be inserted deep into the tube hole from the tube side of the tube sheet for welding, so it is called internal hole welding. Benefits of internal hole welding: 1. The temperature of the weld is close to the temperature of the shell side medium ； 2. There is no gap between the heat exchange tube and the tube hole, which can completely eliminate gap corrosion. ； 3. The welded joint is not a corner joint but a butt joint, which can withstand larger loads. Therefore, internal hole welding can be used in heat exchangers that require lowering the temperature of the welded joint to avoid thermal fatigue. ； Used in heat exchangers that require avoiding shell-side medium gap corrosion ； It is used in heat exchangers that require higher strength connection joints, such as heat exchangers with high design pressure, high design temperature, and harsh conditions.
It can resist gap corrosion, and butt welds are more resistant to vibration.