Regarding the operation of valves with blind ends
Thread Content
Considering the possibility of future expansion of the project, many areas at the site were left as placeholders, which resulted in numerous dead ends – that is, a valve paired with a blind flange. Question: Should this valve be kept open or closed normally? If it’s left open, it probably won’t close properly in a few years. If it is closed, the space between the valve and the blind flange becomes sealed, and thermal expansion and contraction can cause the gasket to leak.
It definitely has to be turned off. It will be turned on when needed.
Keep it closed and add a blind flange below. Valves don’t break that easily
Hello, original poster. I’m here to learn *. Could you explain what the process of thermal expansion and contraction is? Thank you very much. Since it’s already closed, how could it get any worse?
It needs to be shut down; that’s beyond doubt. The key question is why it needs to be shut down. This setting takes into account the fact that once it is connected to the second-phase grid, it can be integrated while the line is in normal operation, without the need to halt production; therefore, the valves must be closed. Some of these valves leak, and blind flanges are used to prevent such leaks.
It must be turned off; the connections will need to be cleaned up again later