Detailed analysis of the failure caused by the mass flow meter measuring medium

What is the detailed analysis status of the fault occurrence body caused by the mass flow meter measuring medium? In this series of questions, we decided to decide on a few situations that may occur. The situation is as follows. Let's see what points are there? Did you have the same experience? 1. Failure phenomenon of mass flow meter Nitrogen gas of a company is transported into the high-pressure nitrogen storage tank (4.5MPa) of company B through a pipe, and the pressure of the nitrogen pipe network is about 3.7MPa. It is reflected that when the amount of nitrogen is large, the difference between the amount of nitrogen and the large pressure drop of nitrogen cannot be sent to the high-pressure nitrogen storage tank, and the flow and pressure cannot meet the production needs of company B. 2. Analysis of the failure causes of the mass flowmeter First confirm the pressure drop of the mass flowmeter. When Company B needs a large amount of nitrogen supplementation, the maximum flow rate of the mass flowmeter is 310kg/h, and the pressure drop across the flowmeter reaches 1.5MPa, which is inconsistent with the theoretically calculated pressure drop of 0.041MPa; the flowmeter is removed and returned to the manufacturer for inspection. The test results show that the inner wall of the measuring tube of the flowmeter is smooth, and there is no possibility of large pressure drop. The organization, design, user, etc. analyzed the pressure drop when the instrument was put into use. It was believed that the reason for the reduction of the DN40 to DN15 pipeline caused the pressure drop to increase. After communication, the plan of replacing the DN25 mass flowmeter was adopted. 3. Solution to mass flowmeter failure When the construction unit replaced the mass flowmeter, after cutting the original pipeline, it was found that there was a stone at the front flange of the flowmeter from DN40 to DN15 reducer to block the inlet of the flowmeter. Based on the above analysis, it is found that the main reason for the large pressure drop before and after the flowmeter is that the pressure drop at both ends of the flowmeter increases due to the blockage of stones. After the replacement of the DN25 flowmeter, the nitrogen demand of Company B was met. Well, that's all for the above situation, I hope I can help you, and if there is more about the flowmeter failure, you can log in to Kaidi's official website at any time to check the details.

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