The jacketed reactor was originally connected to steam as well, but it’s not in use now. Is it considered a pressure vessel?
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By using the existing jacketed atmospheric-pressure reactor, which was previously connected to steam, the new product does not require steam, and steam will not be used anymore in the future; so wouldn’t this equipment no longer be considered a pressure vessel?
Please check the sections on installation, modification, and maintenance in the comprehensive regulations TSG 21-2016. Although the operating parameters of your equipment have changed now, it is possible that, under these new parameters, your equipment may no longer fall under the scope of these regulatory requirements; however, you need to inform the local authority responsible for regulating pressure vessels in writing.
1. First, block the steam pipeline with a blind flange, or disconnect the pipeline from the steam supply. 2. Go to the Market Regulation Bureau to handle the cancellation.
When repurposed for other uses, it is necessary to re-evaluate whether supervision, inspection, and registration are required in accordance with TSG 21-2016.
Go and complete the cancellation registration procedures
Is it only when the distance between the inner and outer walls is greater than 150 mm that it qualifies as a pressure vessel?
It is the diameter, not the gap between the jacket and the inner cylinder.
Going forward, I will be working on atmospheric pressure vessels only; I will no longer handle pressure vessels. It’s no longer a matter of modifying pressure vessels – it’s equivalent to having additional pressure vessels taken out of service, and they are no longer subject to the relevant regulatory requirements. One should explain the reasons to the local authorities and apply for their cancellation; once cancelled, they are no longer managed as operational pressure vessels.
If the steam interface is disconnected or a blind flange is installed, and the procedures for canceling registration of the pressure vessel are carried out at the Market Regulation Bureau, it can then be used and managed as a vessel under normal pressure.