Session: NDE-02-01 NDE Techniques and Applications for Petrochemical and Power Plant Components

Paper Number: 60907

Start Time: Tuesday, July 13, 2021, 05:00 PM

60907 - Inspection Method of Finned Tube and Finned Heat Exchanger 

The finned tube heat exchanger is one of the earliest and most successful discoveries in the process of improving tube heat exchange. This method is still the most widely used method of all kinds of tube heat transfer surface enhancement heat transfer methods. It is not only suitable for single-fin tube heat exchangers, which are widely used in power, chemical, petrochemical, air-conditioning engineering and refrigeration engineering.

Finned tubes and finned heat exchangers can be inspected through the pressure test during the supervision and inspection of the manufacturing process, but in the in-service inspection, it is sometimes difficult to pass the pressure test, and different testing methods are required to ensure Quality, this article introduces in detail the methods of inspecting finned tubes and finned heat exchangers. Especially the eddy current detection technology of the finned tube under the condition of in-service air cooling. The near-field eddy current and the far-field eddy current are compared, and the test results are compared and verified. The comparison results show that the eddy current detection technology can be more accurate and reliable. The corrosion of the finned tube under service air cooling is detected, and a reliable basis is provided for judging the use of the finned tube and finned heat exchanger.

Presenting Author: Ju Ding Shanghai Institute of Special Equipment Inspection and Technical Research

Authors:

Ju Ding Shanghai Institute of Special Equipment Inspection and Technical Research
Min Zhang Praxair,Inc
Shu-Hong Liu Shanghai Institute of Special Equipment Inspection and Technical Research
Jie-Lu Wang Shanghai Institute of Special Equipment Inspection and Technical Research
Sheng-Hui Wang Shanghai Institute of Special Equipment Inspection and Technical Research