1. Specifications and grades
| product name | specification（mm） | status | brand | Executive Standard |
| Titanium tube sheet, titanium forgings | Outer diameter(300～1500mm) Height (40～100mm) processed according to drawings/customer requirements | Hot forging, machining | Gr1，Gr2，Gr5，Gr7 | GB/T16598、ASTM B381 |
2. Product introduction:
1. Tube plate is a kind of fitting that drills a slightly larger hole in the circular steel plate than the outer diameter of the tube, penetrates the tube and welds it for fixing.
2. In the calculation of the fixed tube sheet, there is one of the axial stress of the shell, the axial stress of the heat exchange tube, and the pull-off force q between the heat exchange tube and the tube sheet according to various working conditions with temperature difference. When the strength (or stability) condition cannot be met, an expansion joint needs to be set. In the calculation of the strength check of the fixed tube sheet, when the thickness of the tube sheet is determined and the expansion joint is not provided, sometimes the strength of the tube sheet is insufficient. After the expansion joint is provided, the thickness of the tube sheet may meet the requirements. At this time, an expansion joint can also be provided to reduce the thickness of the tube sheet, but it should be determined from a comprehensive evaluation of material consumption, ease of manufacturing, safety and economic effects.
3. U-shaped expansion joints are commonly used in fixed tube sheet heat exchangers, which have the advantages of compact and simple structure, good compensation, and low price.
4. The precision of the tube sheet processing, especially the tube hole spacing and tube diameter tolerance, verticality, and smoothness greatly affect the assembly and use performance of the chemical equipment listed above. With the enlargement of chemical equipment and power stations, the diameter of the tube sheet has become larger and larger. Tube sheets with a diameter of 4m-5m are very common. The characteristics of the large tube sheet are the large number of tube holes, dense, small aperture, deep, high precision and smoothness requirements.
3. Material:
Different materials are used according to different use environments. Generally, Q345R container plates are used, such as one or two pressure vessels, no corrosive medium is circulated, and carbon steel composite plates can be used. In the environment of strong acid, high pressure, high temperature, nuclear energy, etc., stainless steel, 16 manganese, titanium alloy and other corrosion-resistant materials are needed, and the application of new synthetic materials has brought new vitality to tube sheet products.
4. Application areas:
Tube sheets are widely used in tube-tube heat exchangers, boilers, pressure vessels, steam turbines, large central air-conditioning and other industries. It is mainly used in chemical containers, such as tube heat exchangers, pressure vessels, boilers, condensers, central air conditioners, evaporators, and seawater desalination. It plays a role in supporting fixed tubes, and the metal material makes it not only strong Rigid, and has great thermal conductivity.
