I would like to ask you about the temperature measuring holes and pressure measuring ports.
Thread Content
As shown in the picture, due to space reasons in a certain project, I want to put the temperature measuring hole and the pressure tapping port on the calcining furnace together. Is this advisable? The pressure in the furnace is below 200Pa.
The temperature measuring hole and the pressure tapping port can be placed together. Because the pressure in the furnace is below 200Pa, the connecting pipe between the two orifices can be designed and installed according to standard requirements to ensure that they will not affect each other. However, it should be noted that the location of the temperature measuring hole and pressure tapping port should be selected in an area where the temperature and pressure in the furnace are relatively stable to ensure the accuracy of the measurement data. At the same time, it is also necessary to regularly check the sealing condition of the orifice during use to avoid leakage or penetration. .
OK, thanks! I would also like to ask if there is any relevant information on this point?
Generally it is not designed like this. The direction of the temperature measuring port is perpendicular to the direction of the air flow or facing the direction of the air flow, so as to ensure accurate temperature measurement. The diameter of the temperature measuring tube is small. If there is dust in the gas, it will accumulate, so the pressure at the pressure measuring port will be inaccurate.
This design should consider the process design, the changes and characteristics of the gas flow of the process medium in the furnace
It is not recommended to install in this way. It does not mention whether the pressure of such an installation can be accurately measured. First of all, it does not comply with the installation specifications. Although the pressure is high, it is not a reason to be uneasy about the regulations. The owner can carry out installation and construction in accordance with the requirements of HGT 21581-2012 Automatic Control Installation Atlas, SHT 3104-2000 Petrochemical Instrument Installation Design Specification, GB 50093-2002 "Automated Instrument Engineering Construction and Acceptance Specification" and other specifications.
In fact, I checked before and found no relevant regulations or drawings saying that this kind of installation is not allowed. There is also no installation drawing for metallurgical industry automation instruments. If it is on a pipeline, it is not allowed according to the regulations.