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+86 512-63419655

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ndt@desisengroup.com

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Suzhou desisen electronics co.,ltd.
ADD:Building 31, U science park, no.4168 dongshan avenue, linhu town, wuzhong district, suzhou city
TEL:+86 512-63419655
PHO:+86 13616209379
FAX:+86 512-63459655
Email:ndt@desisengroup.com
Email:z5421473@126.com

558H far field low frequency water wall heat exchanging pipe eddy current detector
Product model:558H
Subordinate classification:New arrival
Application area:

corrosion erosion、abrasion 、corrosive pitting、dehiscence 、crack of Water wall tube 、heat exchanging pipe 、downhole casing 、steel tube、tank、condenser、boiler、feedwater heater、air condition 

558H far field low frequency water wall Tube heat exchanger eddy current flaw detector isplaced on the detected material with electromagnetic base probe,there is an excitation coil as well as one or two detecting coil。The distance of excitation coil and detecting coil is two or three times of detecting material。The excitation coil sending the magnetic line can pass through material and spread to outside,and pass through tube wall which has surface flaw again and spread to inside,received by detecting coil。 Make sure the interval of Excitation coil and detecting coil

There are three areas in excitation coil and detecting coil:direct coupling area、transition area、 and far field area。The amplitude of Outside wall is bigger than inside one,when the interval is more than or equal to double detecting material, the amplitude of outside wall and inside wall will be in direct proportion to interval, and the interval is three times of material (far field area), the amplitude of outside wall and inside wall are bigger 。So the distance of excitation coil and detecting coil should be 2-3 times of inner diameter 。

Wave is spreading in material

During wave is spreading in the steel plate,amplitude is decreased,phase position will move。The thicker the material ,the fast the amplitude decreased

Distribution of Magnetic line nearby Probe 

The track of magnetic line is parallel to tube wall in far field,therefore the number of magnetic line which pass the wall of material is direct proportion to the thickness of wall

  scene pictures  





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Contact

Suzhou desisen electronics co.,ltd. Technical support:RBWL TEL:+86 4000-188-758 +86 512-63419655 FAX:+86 512-63459655 EMAIL:z5421473@126.com / ndt@desisengroup.com
ADD:Building 31, U science park, no.4168 dongshan avenue, linhu town, wuzhong district, suzhou city

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