Expanding tube inside tubehole. Tubes are sealed inside the tubesheet by the following methods. A variety of methods are used for making the joint between the tubesheet and the tubes.
tube to tubesheet joint types tube to tubesheet joint strength welded tube to tubesheet joint seal welded tube to tubesheet joint
I have the choice to go for full strength partial strenght as per uw 20 and.
Tube to tubesheet joint. The main function of tube to tubesheet joint is to seal the tubes tightly to the tubesheet and for some exchangers an additional function is to support the tubesheet against pressure induced load. Roll or expand only without grooves strength is poor leak resistance is poor tube replacement is very easy application is limited ie. The joining technique must lend itself to mass production and to uniformity of quality. Once the type of tubesheet joint is chosen a consistent quality automated welding process is required to create the dozens to hundreds of tubesheet joints that are critical to safe and efficient operation of the final product.
Tube to tubesheet joint details acceptable weld joints where a is not less than 14t acceptable tube to tubesheet welds acceptable weld joints where a is less than 14t thermal rating and vibration analysis thermal performance rating calculations are required in order to show that the heat exchanger will perform as expected. There are four types of tube to tubesheet joints. Lets say for example we have a fixed tube sheet type of exchanger. Well evaluate the most common tube to tubesheet welding types in light of the variables and standards that influence the decision process.
The joining technique must lend itself to mass production and to uniformity of quality. After a decision has been made to use zirconium as the material of construction for a shell and tube heat exchanger one must take into account the process design parameters and other considerations in order to obtain the optimum mechanical design. Thanks but i do know the selection of tube to tubesheet joint in pv elite both as per appendix a and uw 20what actually i am asking is about the general critieria of tube to tube sheet joint selection based on service temperature and pressure etc.
