In the manufacture of shell and tube Heat Exchanger, manual arc welding is usually used for the welding of tube sheet and tube. There are some defects in weld shape, such as depression, air hole, slag inclusion, etc., and the distribution of weld stress is uneven. When using, the tubesheet is in contact with the industrial cooling water, and the impurities, salts, gases and microorganisms in the industrial cooling water will form corrosion to the tubesheet and weld, which is what we often call electrochemical corrosion. The results show that there are various ions and dissolved oxygen in industrial water, whether it is fresh water or sea water. The concentration change of chlorine ion and oxygen plays an important role in the corrosion shape of metal. In addition, the complexity of metal structure also affects the corrosion morphology. Therefore, pitting corrosion and crevice corrosion are the main corrosion types of tubesheet and tubesheet welds. From the outside, there will be a lot of corrosion products and deposits on the surface of the tube sheet, with pits of different sizes distributed. When seawater is used as medium, galvanic corrosion will occur. Chemical corrosion is the corrosion of medium. If the tube sheet of heat exchanger contacts with various chemical media, it will be corroded by chemical medium. In addition, there will be bimetallic corrosion between the tube sheet and the tube.
industrial machinery shell and tube heat exchanger
| Nominal |
|Number of passes|| |
|Heat exchange area Nominal value/calculated value|| Tube passage cross-sectional area |
Flow rate (m/hr) at 0.5m/sec
| pressure |
|Tube length (m)||Φ25*2.5|
Wuxi Dingfeng pressure vessel Co., Ltd
Wuxi Dingfeng pressure vessel Co., Ltd. specializes in the production of reactor, evaporator, stainless steel reactor, stainless steel reactor, scraper evaporator, Heat Exchanger, tubular heat exchanger, spiral Plate Heat Exchanger. Our company has the first, second and third class pressure vessel manufacturing license and passed the ISO9001:2000 international quality system certification. Our factory has established long-term technical cooperation with Wuxi Chemical Design Institute, Jiangnan University, Shanghai Chemical Design Institute and 702 Institute of China shipbuilding industry group. As long as we are engaged in the design, manufacturing, installation, debugging and process technology development of petroleum, chemical, biological and pharmaceutical equipment, technology transfer and related technical consultation and service.
At present, the factory has fixed assets of 85 million yuan, covers an area of 28000 square meters, and modern large-scale industrial plants of 21000 square meters. At present, there are 197 employees, including 60 engineering technicians, 35 technicians in design, process, material, welding and quality inspection, including 4 senior engineers, 16 engineers and 9 assistant engineers. Give full play to the professional skills and innovation ability of all employees, and use the computer-aided system (CAD, 3D3S, SW6) to carry out personalized product design and production according to different products and processes of users, so as to meet the needs of users for diversified and high-quality products.
- Company Name: Wuxi Dingfeng pressure vessel Co., Ltd
- Product/Service: Reaction kettle , Film evaporator , Pipe bundle condenser , Tubular heat exchanger , Distillation tower , Alcohol recovery tower
- Contact Person: Mr. zhang
- Tel: 86-510-80751588
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