Pressure gauge installation
Thread Content
According to the standards, when measuring liquid pressure, it is required that the pressure tapping point be located in the lower half of the pipe cross-section. But in practice, why are the pressure gauges at the pump outlet of liquid pipes installed in the upper half of the pipe cross-section, with the pressure tapping points also in that upper half?
The pressure gauge at the pump outlet should be an on-site pressure gauge; such gauges are generally installed at the upper part for pressure measurement. According to the standards, when measuring liquid pressure, it is required that the pressure tapping point be located in the lower half of the pipe cross-section; this refers to remote transmitters.
May I ask which standards contain relevant requirements?
It will be clear by looking at the HG/T 21581-2012 automation installation manual.
It’s been over half a year already – why is the original poster still in a confused state? Go home and take another close look at the specifications.
The pressure gauge must be installed vertically; having the pressure sampling port in the lower half does not ensure vertical installation!
Field pressure gauges are generally used to measure the pressure in pipelines; sampling ports are usually installed at locations where pressure is not taken during normal operation. The liquid pressure you mentioned likely refers to the pressure in storage tank-type equipment, and in such cases a remote transducer is needed to measure the pressure, with sampling being done at the bottom of the tank