跳至主要内容

How to manufacture the shell and tube heat exchanger II



4. Machining: after checking whether the dimension (outer diameter, thickness) and material of the tube sheet meet the requirements of the drawing, the surface roughness of the machined tube sheet shall not be greater than 25 μ m, and the tube sheet plane shall be visible.





5. Tube plate hole processing: after the tube plate hole of the heat exchanger is finished by the CNC machining center, ensure that the tube plate hole is vertical to the sealing surface of the tube plate, and the hole surface is not allowed to have longitudinal traces of continuity, so as to ensure the effective sealing after the mechanical expansion of the heat exchange tube and tube plate hole.








5. Fabrication and assembly of baffle plate: the baffle plate assembly is divided into two types, I-type and spiral type. After assembly, the baffle plate assembly is sleeved into the shell to ensure that the upper and lower baffle plates fit the shell wall, and the clearance is not more than 3mm, to prevent the influence of water flooding and ensure the heat exchange performance.









6. Assembly and welding of end cover: weld both inside and outside to ensure the welding strength of pipe orifice. Reduce the weld leakage rate.



7. Welding of tube plate and shell: assemble according to the process requirements to ensure the concentricity and perpendicularity of tube plate, cylinder and heat exchange tube. All welds and pipe orifices shall be welded by carbon dioxide gas shielded welding, and welding shall be conducted in strict accordance with the requirements of the product welding process card.



8. Tube expansion: adopt German Technodata numerical control tube expansion machine, mechanical rolling expansion strength expansion, to ensure the sealing performance after tube expansion position expansion of heat exchanger.



9. Air tightness test: assemble all pipe orifices, fill nitrogen or dry compressed air to conduct air tightness test on all pipe orifices and welds in the shell side, and keep the pressure for 24h without pressure drop.

10. Assembly: assemble the end cover after leak detection of the expanded pipe position, multi system evaporator and conduct the cross-talk test of the adjacent system, and maintain the pressure for 12h to ensure no pressure drop loss.


11. Support base installation: the bent compressor, electric box, filter and other brackets shall be assembled and welded according to the size required by the drawing.

12. Painting: after the surface of heat exchanger is polished and plastered, spray primer and finish paint.

13. Packaging and delivery: after the products are painted, assembled and packed in wooden cases, they are ready to be delivered.

评论

此博客中的热门博文

Constant Temperature Swimming Pool Heat Pump Unit | Hstarschiller.com

  We all know that winter swimming has many advantages: 1. It can enhance cardiovascular function. 2. The stimulation of cold water can close the peripheral blood vessels, increase the blood supply of important organs such as heart, brain, liver and spleen, so that more oxygen can be delivered to brain cells in time, which is conducive to the elimination of nervous system fatigue. 3. The skin of those who insist on winter swimming is ruddy, shiny and elastic. And people also hope to enjoy the fun of swimming in winter, but not everyone can bear it.  Hstars group constant temperature swimming pool heat pump  can be a good solution. 1. Demand analysis of swimming pool with constant temperature Constant temperature swimming pool, also known as indoor constant temperature swimming pool; that is, the temperature of the water in the pool heating system is maintained at 26~28℃, which is suitable for the temperature of the human body. When the indoor swimming pool is designed, the water body o

The Role and Characteristics of Condenser in Refrigeration System

  The four major components of the refrigeration system are compressor, evaporator, condenser and throttling device. The role of the condenser in the refrigeration system is mainly to cool and liquefy the gaseous refrigerant in the high temperature and high pressure state discharged from the compressor, so as to meet the requirements of the circulating use of the refrigerant in the system. The selection of the temperature difference between the condensing temperature and the coolant inlet and outlet involves economic issues in the refrigeration system. Increasing the condensation temperature and reducing the temperature difference between the coolant inlet and outlet can increase the heat transfer temperature difference, reduce the required heat transfer area, and reduce the investment cost of heat exchange equipment. However, lowering the condensing temperature can reduce the power consumption of the refrigeration compressor. The greater the temperature difference between the coolant

How to build a cost-saving cold room for Peanut Storage

  Peanut storage conditions have significant effects on overall quality. With   H.Stars   standards for roof pitch, ventilation and other building standards, farmer stock peanut warehouses or cold room are the best solution. Here are some suggestions on one of the type peanut cold storage. Description of Peanut Cold Storage 1. Project details: The specific parameters of the Peanut Cold Storage are as follows: a. Cold storage size: 30m (length) × 25m (width) × 4.5m (height) b. Cold storage temperature: 10 ℃ c. Cold storage goods: peanuts without shell d: Storage capacity of cold storage: 1000Ton 2. After calculation, the chiller capacity of the cold storage is: 150kw 3. Refrigeration system description (1). This project adopts:  efficient refrigeration chilled water system . a. The main refrigeration equipment of the high-efficiency chilled liquid refrigeration system is the water cooled chiller unit. After commissioning and testing in the factory, the whole chilled can be shipped to cu