Issues with the limiting bolts of expansion joints in shell and tube heat exchangers
Thread Content
Is it okay not to install bolts at both ends of the expansion joint? What are its functions? Please take a look at what is shown in the figure below
In shell-and-tube heat exchangers, the function of expansion joints is to compensate for the length changes in pipes or equipment caused by temperature variations through free expansion and contraction, thereby maintaining the stability of the system. Therefore, installing limit bolts at both ends of the expansion joint can prevent it from exceeding the specified displacement range, thereby ensuring the safety of the expansion joint and related equipment. If limit bolts are not installed, the expansion joint may experience excessive stretching or compression during use, which can lead to equipment damage or system failure. Therefore, we strongly recommend installing restraining bolts at both ends of the expansion joint in shell-and-tube heat exchangers to ensure the safety and proper operation of the system. .
The bolts shown in the diagram are likely used during transportation; they need to be removed after the heat exchanger is installed.
Are there any specific regulations and requirements regarding this in the relevant standards?
This is the rod shipped by the manufacturer. The specifications for expansion joints refer to GBT/16749-2018, clause 6.5; the general requirements are in accordance with GB/T151-2014
There are many single-wave thick-walled ones for heat exchangers