How is corrosion-induced thinning in pressure vessels typically repaired?
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If there isn’t much thinning, is it possible to use internal or external panels?
Pressure vessels are subject to strict regulatory requirements, such as vessel regulations. The thinning of pressure vessels should be analyzed on a case-by-case basis, through methods such as physical and chemical testing, corrosion analysis, and strength verification, in order to determine whether they can be repaired or must be scrapped in accordance with relevant regulations.
Subsidies are not allowed; components can be replaced to repair localized corrosion. It’s quite troublesome though ； Various analyses and tests need to be conducted on the material; in addition, design calculations must be revised, and then a report must be submitted to the special department to request repairs.
It should be that a specific repair plan is formulated based on the test results, and it can only be carried out after obtaining approval from all relevant parties, right?
Can surfacing be used for smaller localized corrosion?
Can it be surfaced? Are there any specifications for patching pressure vessels?
In principle, it’s not allowed. If you manage to do it secretly without the regulatory authorities noticing, then you’re lucky. If anything goes wrong in the future, you’ll have to bear it yourself.
It is not allowed to apply patches; welding on top is also not recommended. However, overall or partial replacement can be used as a solution.
What’s the point of fixing it? It’s clearly designated for scrap based on the inspection and evaluation criteria; just replace it with a new one