Yuhong Group Co.,Ltd
Yuhong Holding Group Co.,LTD
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API 660 Shell And Tube Heat Exchanger, TEMA Standard , ASME U Stamp , ASME VIII
Yuhong Group has more than 35 years experience for project package , till now finished more than 2000 projects , and export more than 85 countries , Yuhong Brand already won good reputation in the world, 85% orders from client re-peat order. Yuhong Group advantage products- Shell and Tube Heat Exchanger , the material cover : Stainless Steel, Duplex Steel , Super Duplex Steel , Nickel Alloy , Alloy Steel , Copper and Copper Alloy, Titanium , Carbon Steel , Overlay cladding & Explosion cladding. We can support design:Thermal Calculation (HTRI) , Mechanical Calculation (PV Elite), GA drawing and detail drawings , all procedure control documents (JIC , PQR, WPS, WPQ, NDT,......), All of our heat exchangers according to TEMA standard and can apply ASME U Stamp , we also can make heat exchangers according to client design .
| Features of Shell and Tube Heat Exchangers. | |||
| Shell and Tube Heat Exchanger | Typical in TEMA Code | Advantages | Limitations |
| Fixed-tube heat exchanger | BEM, AEM, NEN | 1. Provides maximum heat transfer area for a given shell and tube diameter. | 1. Shell side or out side of the tubes are inaccessible for mechanical cleaning. |
| 2. Provides for single and multiple tube passes to assure proper velocity. | 2. No provision to allow for differential thermal expansion developed between the tube and the shell side. This can be taken care by providing expansion joint on the shell side. | ||
| 3. Less costly than removable bundle designs. | |||
| Floating-head heat exchanger | AEW, BEW, BEP, AEP, AES, BES | 1. Floating tube sheet allows for differential thermal expansion between the shell and the tube bundle. | 1. To provide the floating-head cover it is necessary to bolt it to the tube sheet. The bolt circle requires the use of space where it would be possible to place a large number of tubes. |
| 2. Both the tube bundle and the shell side can be inspected and cleaned mechanically. | 2. Tubes cannot expand independently so that huge thermal shock applications should be avoided. | ||
| 3. Packing materials produce limits on design pressure and temperature. | |||
| Removable U-tube heat exchanger | BEU, AEU | 1. U-tube design allows for differential thermal expansion between the shell and the tube bundle as well as for individual tubes. | 1. Because of U-bend some tubes are omitted at the centre of the tube bundle. |
| 2. Both the tube bundle and the shell side can be inspected and cleaned mechanically. | 2. Because of U-bend, tubes can be cleaned only by chemical methods. | ||
| 3. Less costly than floating head or packed floating head designs. | 3. Due to U-tube nesting, individual tube is difficult to replace. | ||
| 4. No single tube pass or true countercurrent flow is possible. | |||
| 5. Tube wall thickness at the U-bend is thinner than at straight portion of the tubes. | |||
| 6. Draining of tube circuit is difficult when positioned with the vertical position with the head side upward. | |||
Fixed-tube heat exchanger:
Floating-head heat exchanger:
Removable U-tube heat exchanger:
| 1. Shell |
| 2. Shell cover |
| 3. Shell flange (channel end) |
| 4. Shell flange (cover end) |
| 5. Shell nozzle or branch |
| 6. Floating tube sheet |
| 7. Floating head cover |
| 8. Floating head flange |
| 9. Floating head gland |
| 10. Floating head backing ring |
| 11. Stationary tube sheet |
| 12. Channel or stationary head |
| 13. Channel cover |
| 14. Channel nozzle or branch |
| 15. Tube (straight) |
| 16. Tubes (U-type) |
| 17. Tie rods and spacers |
| 18. Transverse (or cross) baffles or support plates |
| 19. Longitudinal baffles |
| 20. Impingement baffles |
| 21. Floating head support |
| 22. Pass partition |
| 23. Vent connection |
| 24. Drain connection |
| 25. Instrument connection |
| 26. Expansion bellows |
| 27. Support saddles |
| 28. Lifting lugs |
| 29. Weir |
| 30. Liquid level connection |