Steam pipeline compensation issues
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How to compensate for the main steam pipeline? A colleague asked whether to use vertical or horizontal compensation I’m not very familiar with steam pipeline compensation. I ask all fellow sailors for their help. Thank you!
I’ve seen three ways: natural bends； π-type compensation ； Spring hanger.
For us, horizontal compensation is used when the amount of compensation is large, while vertical compensation is used when it is small
Why is lateral compensation used when the compensation amount is large, and vertical compensation used when it is small? Is this a common approach? Also, what does it mean to have a substantial amount of compensation? Are there any specific requirements? Thank you!
There are three types of thermal compensation for pipes: 1. Natural compensation, which makes use of the natural path of the pipe for compensation; this is because pipes need to turn, and bends have the ability to provide thermal compensation. 2. Compensation using expanders, with various shapes of π-shaped expanders, wave-shaped expanders, and so on. 3. Compensation through cold drawing, a method that is used in combination with the above two thermal compensation methods; the amount of cold drawing is generally half of the pipe’s expansion amount
The common forms of compensation are natural compensation and the use of compensators; the specific method to be chosen depends on the temperature of the pipeline as well as its general path.
Low-pressure pipelines: When limit requirements exist, bellows compensation is used. Bellows compensation is suitable for a wide range of pipe diameters. High-pressure and high-temperature pipelines: For example, the main steam pipelines in power plants, cold drawing compensation is used to prevent damage to the equipment. Elbow compensation: suitable for free-flowing pipelines.
Pipelines generally use U-shaped compensation as well as bellows compensation
Such pipelines require stress calculation software to handle them