Can the passivation and degreasing of valves be carried out at the manufacturer?
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Can the passivation and degreasing of valves be carried out at the manufacturer? Why? ? ?
After the manufacturer completes the passivation and degreasing processes, it is also a significant challenge to prevent secondary contamination during subsequent steps such as transportation, on-site storage, and installation.
It seems that these are all tasks from the system’s pre-commissioning phase, carried out in conjunction with the system.
Similar valves undergo tests in the manufacturer’s facility, but the on-site construction team still needs to conduct pressure resistance tests and sealing tests
For the previous project, the manufacturer came to the site to provide guidance for its completion
This needs to be specified in the contract between the owner and the manufacturer
It depends on whether you communicated clearly with the valve manufacturer when purchasing the valves. If more passivation and degreasing treatments are required, those will be carried out. However, contamination may occur during installation, and the pipes themselves also need to be degreased; so basically, it’s sufficient to carry out these treatments once when the valves leave the factory and once more after they are installed
The previous process should not leave problems for the next process
1. Degreasing of valves and pipes before leaving the factory. However, pollution can occur during transportation and installation. 2. Perform degreasing treatment once again after the valves and pipes have been installed. In this way, the entire pipeline is sealed, and no substances from the outside can enter it. So there will be two processing steps; it is part of the manufacturing process and must be done this way. There are no issues from previous processes that need to be carried over to subsequent processes
What you say makes sense. Just because a valve factory performs degreasing on-site after manufacturing the valves, it doesn’t mean they should stop doing degreasing altogether. Similarly, just because degreasing needs to be done on-site, it doesn’t mean the valve factory should cease carrying out this process. These days, some valve factories perform the tests in a perfunctory manner since the pressure tests need to be carried out on-site; once it’s time for those on-site tests, the factory representatives step in
Generally, valve manufacturers will treat valves that require degreasing before reassembly. After assembly, proceed with ultrasonic cleaning! Packaged in film bags! Most valve manufacturers do this in the same way!