Degreasing of pipes and valves
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Dear HaiChuan seniors: I have the following questions regarding the degreasing of pipes and valves, and I hope you can help answer them. (1) Segmental degreasing, followed by installation after degreasing – what are the advantages and disadvantages of this approach? (2) Install it first and then carry out overall degreasing afterward. What are the advantages and disadvantages of this approach? I hope the senior colleagues at Haichuan can give some guidance. Thank you!
Segmented degreasing is relatively simple, but it presents the problem of secondary contamination, requiring protective measures. The overall degreasing system is more complex, as there are some areas that are difficult to reach. Segmented degreasing can reduce the workload associated with overall degreasing
Based on experience, it is advisable to first degrease the valve and then seal its valve port; it should not be installed on the pipeline yet. After that, the entire pipeline section should be degreased using carbon tetrachloride, and only after that can the valve be installed on the pipeline.
Degrease first before installation; there is a risk of secondary contamination, but it’s not convenient to do so. Installing it first without degreasing may result in incomplete cleaning, but the system remains intact and easier to operate
In our company, it is better to first degrease the pipes and valves before installing them, so as to ensure there are no dead corners; otherwise, after installation, degreasing may still be necessary in those areas where dead corners exist.
Let me summarize: Segmented degreasing can achieve thorough degreasing, but it is difficult to control. The overall degreasing isn’t perfect, but it’s easy to control.
Overall degreasing is rarely used. . It’s not a part. .