ClampOn Topside Corrosion-Erosion Monitor (CEM)
The ClampOn CEM system utilizes a unique method of monitoring wall thickness loss by the use of clamp-on sensors. A number of transducers measure corrosion-erosion by transmitting ultrasonic signals that propagate through pipe material. Using ClampOn acoustic transducers means that no drilling or welding that would cause loss of production is required.
The Corrosion-Erosion Monitor consists of a Head Unit and up to eight smaller transducers. The Head Unit processes and controls the signals, communicating with the electromagnetic ultrasonic transducers which are fixed to the selected pipe section. The signal path follows the metal structure between the transceivers in operation, generating a matrix of measurements with thickness information. The number of Head Units and transducers to be used is decided by the client in consultation with ClampOn. Testing has shown the ClampOn CEM to be both physically robust and capable of withstanding changes in pipe temperature.
The system is capable of performing measurements on pipe diameters from 50 mm (2") and upwards and on material thicknesses ranging from 4 mm to 35 mm (0.157" to 1.378"). Changes in average wall thickness of as little as 1% can be measured in real time. The signal path follows the metal structure between the transducers in operation, which in turn generates a matrix of all the measurements.
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