Three attachments of the pressure vessel

Three attachments of the pressure vessel

For the first time, we heard about the three main attachments of the pressure vessel, the tube, the mouth, the spray, the pot, the lid, and the jacket

Safety valve and so on! The pipe hasn't been heard... It's not clear

First time heard that pressure vessel three attachments. Like you said three pressure vessels safety attachments, i.e. safety pressure relief devices (safety valve, explosion-proof membrane, etc.), pressure gauge, liquid level meter.