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Specialized Eddy Current testing services
Seal weld testing, thin-walled tubing, heat exchangers, gas pipes, extruder barrels
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Seal weld testing of heat exchangers with thin-walled tubing
Seal welds are often made to ensure the leak-tightness of heat exchangers, especially with thin-walled tubing such as condensers made of titanium and sometimes stainless steel. The leak-tightness cannot be guaranteed by the expansion rolling of the tube ends only. Since the first development of the Rotilas system, it has been used to scan and inspect over 2,000,000 seal welds!
Benefits:- Quick scanning of seal welds (1,000 welds per hour)
- Production control method, also indicating weld quality degradations long before the actual 'reject' of welds has to take place
- Inspection directly following the welding (unlike radiographic inspection!)
- Recorded results, yielding the possibility for trending and support management decisions
- Possibility of rapid deployment all over the world; equipment portability.
For more information, download the brochure below or contact us.
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Corrosion and erosion mapping in heat exchangers
In order to establish the type of corrosion and severity more accurately than by means of standard eddy current testing, KEMA developed the "ROTEC" system to map the tube wall. With its flexible surface riding capability, the ROTEC system is especially suitable for certain steel tubing, such as finned economizer, evaporator and air cooler tubes. The system was later redesigned to handle curved tubing, as it is sometimes present in boilers. This system has been named "GROTEC".
Benefits:- Corrosion and erosion types of attack can be displayed accurately
- Possibility to pinpoint 'counter measures'
- Recorded data, yielding trending possibility: degradation progress can be monitored
- No limitations to the inspectable tube length of a heat exchanger
- Strong visualization method to support management decisions: repair/replace or continue
- Last resort to ND-test flaws in certain types of tubes.
For more information contact us.
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Remote field Eddy Current testing of heat exchanger tubing
Conventional eddy current testing is hardly suitable for inspecting carbon steel tubing and tubes made of other ferromagnetic material. Remote field eddy current technique is often the solution to this problem. The shielding effect of the inner tube wall is less dominant than with the conventional eddy current testing.
Benefits:- Quantitative method
- Recorded measurement data: "trending" possibility
- Accurate assessment of wall thickness loss (in 0.01 mm)
- No limitations to tube length
- Virtually no risk of missing "abnormalities"
- Short testing time.
For more information download the brochure below or contact us.
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Remote field Eddy Current testing of gas pipes
Since 1999 KEMA has also been exploring the possibilities of applying the so-called Remote Field Eddy Current (RFEC) technique for the purpose of inspecting incoming gas pipes into houses and other buildings. The development has come to the ‘proof of principle’, i.e. the technique appears to be sensitive enough to detect general corrosion and single defects from a certain level. The RFEC probe has been developed to survive all obstructions and return at the entrance undamaged.
Benefits:- Prevention of dangerous leaks in and near buildings and houses
- Quantitative method
- Recorded measurement data, "trending" possibility, predictive maintenance
- Accurate assessment of wall thickness loss (in 0.1 mm)
- Virtually no limitations to tube length
- Virtually no risk of missing "abnormalities"
- Short testing time.
For more information contact us.
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Eddy Current testing of extruder barrels
KEMA has developed a method to check extruder barrels quickly and quantitatively. It can be applied to barrels of conventionally hardened steel, or to steel produced according to HIP (Hot Isostatic Pressure). Extruders can be assembled as a chain of blocks or from one piece. This method can be applied during outages, and in addition to visual/endoscopic inspections without spending too much extra time. Benefits:- Quantitative method
- Early warning of wear
- Recordable results, trending possibility
- High accuracy (starting from 0.1 mm)
- Independance of extruder length
- Minimal chance of missing abnormalities/degradations
- Short measuring time (less than ¼ hour).
For more information download the brochure below or contact us.
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