Pipeline leak
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The reaction vessel uses only an external jacket for heat exchange; it is first heated to 200 degrees using steam, and then cooled to room temperature with cooling water. This often results in leaks in the valves. Dear experts, how can this problem be resolved without changing the configuration of the reaction vessel?
What size is the reactor, and what size are the pipe connections? What’s the situation now? Another pair of pipe ports can be added, for steam and cooling water, running separately. Or a tee attached to the flange.
Frequent heating and cooling can cause internal leakage in valves. 1 If the valve’s switching components are worn out, upgrade its sealing material to cemented carbide. 2 If the valve isn’t properly sealed due to human error, make sure to eat more. 3 If the valve cannot ensure automatic shutdown, then add another valve, one for automatic operation and one for manual operation.
The kettle isn’t very large; it’s about two to three square meters in size. The steam and cooling water are supplied through DN25 pipes
Are there any suitable valves you can recommend?
They are all ordinary valves; there’s nothing special about them. What was the PN value originally? Z41Y-40 DN25
Try adding double valves along the internal leak path.
Do the valves need to be opened and closed frequently?
There is no perfect solution for internal leakage in valves; it can be reduced by minimizing particles in the medium, replacing soft sealing materials, and using dual valves to provide an additional layer of protection
Is it related to temperature? Would it be better to use valves for steam?
Internal leakage is difficult to avoid; therefore, in the chemical industry, what requires isolation using blind flanges cannot be replaced with valves. One of the direct causes of the Bhopal disaster in India was internal leakage from the valves; the use of appropriate soft seals instead of hard seals could reduce such internal leakage