Material Compensation in Heat Exchanger Tubes

Speaker:
Vajpayee, Ankit; Russell NDE Systems Inc.; Canada

Authors:
Vajpayee, A.; Russell NDE Systems Inc.; Canada
Eng, C.; Russell NDE Systems Inc.; Canada
Eng, P.; Russell NDE Systems Inc.; Canada
Russell, D.; Russell NDE Systems Inc.; Canada

ID: ECNDT-0439-2018
Download: PDF
Session: Materials Characterization - ElectroMagnetic Techniques 2
Room: J2
Date: 2018-06-15
Time: 11:10 - 11:30

When testing heat exchanger tubes (ferrous and non-ferrous) there is a great potential for the calibration tube to be an imperfect match to the tubes in the bundle.
Russell NDE Systems has developed software that will not only tell you the material of the tube, but will alert you if the calibration tube material does not match the tubes in the bundle.

Mis-matches can occur due to de-alloying of the tubes while in service, or incorrect material specifications, or general erosion of the tube wall thickness over time. If the tubes’ electrical and magnetic properties (delta sigma or delta mu) are more than 5% different from the calibration tube, the software allows a correction to be made which makes the calibration curve valid.