What are some common causes of gas pipeline vibration 20 Carbon Steel line?

What are some common causes of gas pipeline vibration 20 Carbon Steel line?
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1 Answer

Answer :

► The upper pressure range and /or the smaller pipe diameters prompts me to investigate the  possibility that the gas is reaching critical flow somewhere downstream within the pipe. When a gas gets
to critical flow, sonic booms (producing vibration) are expected. In fact, one of the main means by which  the additional pressure in the pipe is lost.
► If the source is a compressor, look for surging.
► If the source is a tower, look for pressure cycling in the tower
► Look at critical flow through any control valve that may be in the line.
► Are there any vapors in the line, which can condense and produce two-phase flow? Two-phase flow  can cause vibration.
In chemical plant design, if we suspect two-phase flow, we instruct the piping designers to provide  special anchoring
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