Issues with the pipes on the jacket of the reaction vessel
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Can a pipe be installed in the reactor vessel, passing through the jacket and extending outside of it? What are the disadvantages of doing this? Is it feasible in terms of equipment manufacturing?
Yes, a larger fitting can be welded to the edge of the jacket plate to separate the jacket from the fitting.
Does it mean putting a larger pipe opening over a smaller one? Is it not possible to weld the small pipe end directly?
See Figure D25 a,b in Appendix D of GB150-2011 for details
First, it is necessary to determine whether this reaction vessel is a pressure vessel; if it is, then it cannot be used.
Pressure vessels require procedures for modification and repair
Sure. Pay attention to the shape of the welding groove. Pay attention to alignment and the timing of welding. Pay attention to the number of times and the timing for conducting the voltage withstand test and the airtightness test. Pay attention to the medium in the takeover and jacket, and check whether there are harsh operating conditions such as alternating hot and cold temperatures. In manufacturing, attention should be paid to the material of the pipe fittings, the material of the inner cylinder, and the material of the jacket; it is also necessary to choose the groove preparation methods and welding sequence appropriately.
Ordinary carbon steel or stainless steel reactors are feasible.