Issues with opening holes in pressure vessel measurement points
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Hello, everyone who is more experienced than me! I have been working on voltage regulator design recently, and I am confused regarding the specific structure of the openings for the temperature and pressure gauge measurement points on the pressure vessel cylinder; unfortunately, I could not find any relevant information online. Our company uses thermocouple transmitters for both temperature and pressure measurement. The inner wall of the pressure regulator is made of stainless steel that has been cladded, while the base material is low-alloy steel. Due to customer requirements and experimental needs, it is prohibited for the medium (deionized water) to come into contact with the base material, in order to prevent rusting and detachment of that material, which could lead to blockages in the measurement ports. However, I am not very familiar with this aspect. I would appreciate it if the seniors could guide me regarding the specific structure in this area or any relevant books and materials.
Pressure gauges can be connected using flanges; there are pressure gauges with direct flange connections, and it is also possible to drill a small hole of about 10 mm in the flange cover and weld a pressure gauge fitting there. If the medium is steam, a pipe with dimensions of φ18×3 can be welded to the shell at one end and a pressure gauge fitting at the other end; moreover, a ring with a diameter of around 100 mm should be bent in the middle of this pipe to cushion the impact of the steam on the pressure gauge. As for the way to connect the thermometer, weld the thermometer connector to the housing; a thermometer sleeve is welded to the inner end of the thermometer, and a blind plate is welded to the end of the sleeve. There are also cases where no sleeve is needed, as the thermometer itself comes with one – the choice depends on the medium being used.