Bellows pressure testing
Thread Content
Today, pipeline pressure testing was carried out, which caused the bellows to stretch out significantly and become unusable. After looking up information, I found that it’s necessary to restrain the bellows; I remember having studied these specifications a few days ago in preparation for the certified chemical engineer exam, yet I wasn’t aware of this! ! ! It’s frustrating not to be able to apply what you’ve learned! ! ! Last time, I must have broken a glass tube while stamping it; it was really annoying! Why it remains unknown even after seeing it – only when something goes wrong does it get firmly remembered! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !
The bellows have been pressure-tested before leaving the factory; is a bypass used instead when testing the pipeline?
The specifications clearly state that fixing devices are required at both ends of the bellows. Moreover, in most cases observed on site, there are several tube-like fixtures used to restrict their movement; such mistakes should not happen
It should be removed before pressure testing; if removal is not feasible, it is necessary to consult the manufacturer to find an appropriate method for securing it. Prevent overpressure tensile failure
The manufacturer doesn’t provide this setting; I also checked the specifications. I didn’t realize it when setting it up, and it wasn’t until something went wrong that I remembered
What are the relevant specifications? Could you provide the standard number?
You only realize the pain when you have your blood drawn; without pain, there’s no memory! Everyone is the same!
The bellows you are referring to are likely the flexible connectors used between glass pipes. The flexible connectors you are using cannot withstand pressure; generally, a pressure of 1 kilogram is sufficient for glass pipes. You can replace them with flexible connectors that can handle pressure.