1. Abnormal Cumulative Flow in Mass Flow Meter Troubleshooting: A mass flow meter at a plant showed cumulative flow even when there was no process flow. Upon inspection, it was found that the supports at both ends of the sensor did not meet installation requirements. Specifically, the support distances were uneven, and the bottom of […]
In industrial settings, it’s common to hear statements like: “The equipment is still running, why shut it down?” “If we shut it down now, who will bear the loss?” “It was just repaired last year, why is it failing again?” These questions are heard every day. But what’s more difficult is the aftermath of an
Common Challenges Faced by Engineers: Should Equipment Continue Running or Be Shut Down? Read More »
In industrial settings, there’s a dangerous “knee-jerk” reaction that can be costly: Whenever the pressure transmitter readings fluctuate, technicians often suspect the device is faulty and immediately request a replacement. What happens next? A new transmitter is installed, but within a few days, the same “drift” occurs again. Engineer Li, with years of experience in
Is Your Pressure Transmitter Really Faulty? In Most Cases, It’s Innocent Read More »
Thermal mass flow meters, commonly used for measuring the mass flow rate of gases or small amounts of liquids, may experience significant fluctuations, leading to unstable readings that can impact process control. The causes of such fluctuations should be investigated from multiple aspects, including the properties of the medium, instrument installation, equipment parameters, and external
Reasons and Solutions for Large Fluctuations in Thermal Mass Flow Meters Read More »
When engineers first look at a piping or P&ID drawing, one thing becomes immediately noticeable:there are not many words, but there are many letter combinations. These letters are what we commonly call valve and piping codes.At first glance, they may look complicated, but in reality, they are simply a compact way of expressing technical information.
Understanding Valve and Piping Codes in Engineering Drawings Read More »
Understanding DN, D, De and Ø in Engineering Practice In many projects, pipes and flanges fail to fit during installation. This problem is often attributed to poor communication, purchasing mistakes, or site workmanship.However, from an engineering and inspection perspective, the root cause is usually much deeper — and far less intuitive. DN itself is not
Why DN Alone Is Not a Real Pipe Size Read More »
A Practical Guide to Flow Measurement and Flowmeter Selection Introduction Why does an electromagnetic flowmeter become less accurate when measuring sludge-containing wastewater?Why does a steam flow measurement still fluctuate badly even when an imported differential pressure transmitter is installed?Why does an oval gear flowmeter measuring lubricating oil seize after only a few months of operation?
Laminar Flow, Turbulent Flow and Reynolds Number Read More »
1. Issue: Display of the 8800D Saturated Steam Flowmeter Shows Low Readings Fault Diagnosis: This was a newly installed meter. Upon rechecking the settings, it was found that the flow measurement unit was set incorrectly— the range upper limit of 16,000 kg/h was mistakenly set to 16,000 m³/h. Fault Resolution: After correcting the range upper
Troubleshooting and Repair of Flowmeters: Case Studies of Common Issues Read More »
Introduction In industrial piping systems, strainers are rarely the most expensive components, nor are they usually the focus during the design stage. However, in actual operation, many problems that appear to be incidental—such as abnormal pump wear, control valve sticking, or gradual deterioration of heat exchanger performance—can often be traced back to insufficient filtration or
What Is a Pipeline Strainer and How Should It Be Selected? Read More »
1. Instrument Body and Accessories Inspection 1.1 Pressure Gauges / Differential Pressure Gauges Inspection Points: Check whether there is condensation, water droplets, or moisture inside the gauge. Ensure the pointer is intact, without falling off, sticking, or abnormal movement. Confirm the dial scale is clear and legible. Inspect the gauge body for deformation, mechanical damage,
Instrumentation Inspection Checklist and Key Inspection Points Read More »
