Does pipe scaling or lining affect accuracy?

Yes, pipe scaling or lining can significantly affect measurement accuracy in clamp-on ultrasonic flowmeters.

Scaling, corrosion, or thick internal linings change the way ultrasonic signals travel through the pipe wall and the fluid. These conditions can attenuate or scatter the ultrasonic signal, resulting in reduced signal strength, unstable measurements, or increased measurement error. In severe cases, the flowmeter may have difficulty establishing a reliable signal path.

In addition, unknown or uneven lining thickness can cause errors in the calculated sound path length and sound velocity, which directly impacts flow calculation accuracy.

To minimize these effects, it is recommended to:

Select a pipe section with minimal scaling or lining buildup

Ensure accurate input of pipe material, wall thickness, and lining parameters

Clean the pipe surface and ensure proper sensor alignment and acoustic coupling

Verify signal quality during installation and adjust the sensor position if necessary

Under proper installation and favorable pipe conditions, reliable and accurate measurements can still be achieved.