Process Engineering Division – Instrumentation and Automation Section – Daily Question – Question dated 2020-08-29
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Process Engineering Division – Instrumentation and Automation Section – Daily Question – Question from 2020-08-29: Discussion question: 219. Why is it necessary to inject flushing oil when the instrument flow rate is inaccurate?
Since viscous heavy oil has entered the gauge heads or pressure transduction tubes, affecting the accuracy of instrument measurements, it is necessary to use light diesel with a pressure higher than that of the medium being measured in order to flush the pressure transduction tubes and the diaphragms of the gauge heads.
For transmitters with a flushing oil system that are in operation, inaccurate readings caused by issues such as slight blockage of the pressure tapping ports or freezing of the pressure lead lines require the injection of fresh instrument flushing oil.
The wording is incorrect; I don’t understand what it means
Since the header or pressure tapping pipes are filled with heavy oil with high viscosity, which affects the accuracy of instrument measurements, it is necessary to flush them using light diesel with a pressure higher than that of the medium being measured.
Ensure that the pressure lead is not clogged or covered with deposits
Since viscous heavy oil has entered the gauge heads or pressure transduction tubes, affecting the accuracy of instrument measurements, it is necessary to use light diesel with a pressure higher than that of the medium being measured to flush the pressure transduction tubes and the diaphragms in the gauge heads.
Ensure that the pressure lead is not clogged or covered with deposits
Since viscous heavy oil has entered the gauge heads or pressure transduction tubes, affecting the accuracy of instrument measurements, it is necessary to use light diesel with a pressure higher than that of the medium being measured to flush the pressure transduction tubes and the diaphragms in the gauge heads.
Since viscous heavy oil has entered the gauge heads or pressure transduction tubes, affecting the accuracy of instrument measurements, it is necessary to use light diesel with a pressure higher than that of the medium being measured to flush the pressure transduction tubes and the diaphragms in the gauge heads