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Category: Plant Basics
Question: What are some common causes of gas pipeline vibration (20" Carbon Steel line)?
Keywords: gas,pipeline,pipe,line,vibration,causes,troubleshoot,troubleshooting
Answer: Check / consider the following:1.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. As a matter of fact, that's one of the main means by which the additional pressure in the pipe is lost2. If the source is a compressor, look for surging.3. If the source is a tower, look for pressure cycling in the tower4. Look at critical flow through any control valve that may be in the line.5. 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.