expansion joint
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What are the rules for the number and location of expansion joints? ?
There are many types of expansion joints, and their functions are also different, so they cannot be generalized. It's best if you have a specific situation so that others can help you answer it.
It's this kind of corrugated expansion joint. This pipe carries high-temperature flue gas.
Yours is an axial corrugated compensator. It has not been installed yet, so you can't tell whether it is caused by internal pressure or external pressure. This kind of compensator is the simplest. Just buy and set it according to the length and compensation amount, and leave some margin.
I would like to ask, how much margin is usually left? For example, the calculated expansion of the pipe is 150mm. How much expansion should be specified in the expansion joint data sheet for verification? 1.2 times? Just add 50mm?
The poster's should be an axial internal pressure expansion joint. The setting principle is to install only one expansion joint between every two fixed brackets. The expansion joint is placed close to the fixed bracket. The compensation amount of the expansion joint should be "the calculated thermal elongation of the pipe + the design allowance". On the side of the expansion joint away from the fixed bracket, guide brackets should be installed in sequence.
For a 10%~15% margin, such as 100mm compensation, only use 90mm or 85mm.