How long should the steam pipeline be equipped with expansion joints?
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In boiler pipe piping, in straight section pipe laying, how long is the pipe length necessary to install an expansion joint?
Generally, it is easy to install an expansion joint of 50~60m, and it is best to determine it through calculation.
The selection of expansion joint is equal to the length of straight pipe section x temperature expansion line displacement
The details should be determined by calculation and are related to the following factors:: 1. Medium temperature and pressure 2. Pipe diameter 3. Selected compensator type
Generally, it can be determined based on the amount of expansion. When the amount of expansion is greater than 80mm, it is necessary to consider using a U-shaped expansion joint. According to experience, a U-shaped expansion joint absorbs an amount of expansion of 100~250mm. The number of expansion joints needed depends on the allowable size of the U-shaped pipe or the place where the U-shaped pipe is placed.
Generally, natural compensation can solve the problem, and it is not recommended to use a compensator. If a compensator must be used to solve the problem, and flexibility analysis is required, generally the design standards can be used for simplified calculations or the finite element stress analysis method can be used directly to solve the problem! ! ! ! ! !
The length of the pipe should be determined according to the compensation amount of the compensator. If the compensation amount is large, the distance between the pipes can be longer, but be sure to leave a margin.
It has a lot to do with the temperature and pressure of the pipeline, especially pipelines with high temperature and high pressure, which can only be determined after strict calculations!