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Corrosion monitoring
KEMA Corrosion Probe, KEMA on stream wall thickness measurements
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KEMCOP®: a simple but effective Corrosion and Fouling Monitoring System
Corrosion in vital components is a continuous cause for concern in power plants and municipal waste incinerators. Maintenance engineers are often forced to carry out drastic operations to check if corrosion will play a role in the planned maintenance strategy. KEMA has developed a simple but effective method for early corrosion and fouling detection of waterwalls.
KEMCOP®s (KEMa COrrosion Probes) can be mounted on several locations in the strips of waterwalls in (coal-fired) power plants and waste incineration plants. They are easily accessible and can be mounted and dismounted during operation. They give information about corrosion rates and the quality and composition of corrosion products as a result of the firing conditions.
All KEMCOP® data are stored confidentially in a unique database. We guarantee quick and clear results due to standard sample preparation and reporting procedures. KEMCOP®s are already installed in three Dutch coal-fired power plants and two waste incineration plants.
For over 50 years KEMA has been active in the field of corrosion and material testing. Based on experience and optical and electron microscopical examination in the modern KEMA Laboratory, clear and well-founded statements are made on the formation of oxide layers and deposits.
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Avoid expensive scaffolding and insulation work
Corrosion and erosion affect the wall thickness of your pipework. Regular overhauls are planned to inspect the integrity. Expensive scaffolding has to be built for locations that are difficult to access. For these locations and critical components in your system the KEMWAT (KEMA system for on stream wall thickness measurement) is the right solution for you. KEMWAT accurately measures the wall thickness at temperatures up to 550ºC.
Method applied
An ultrasonic technique is applied to measure the wall thickness of pipes. Critical areas, which are mostly known from experience or inspections, are subject to monitoring. At the critical spot a stud is welded and an ultrasonic transducer is mounted at the free end of the stud just outside the insulation.
Cables are connected to a junction box in an easily accessible place so that readings can be taken at any time during operation. Measurements can be performed with standard ultrasonic equipment.
Measurement resolutions of less than 0.1 mm are achieved using a thermocouple wire mounted near the stud weld. Measurement intervals can vary depending on the decrease of the wall thickness monitored. Results can also be used in condition based maintenance.
Your benefits
Cost savings:- no scaffolding necessary
- fewer inspections
- higher availability.
Input to improve maintenance planning.
For more information, please contact us.
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