Location

Snowmass Village, CO

Start Date

1-1-1995 12:00 AM

Description

Under previous programs for the Pipeline Research Committee, Battelle has developed and field tested a low frequency eddy current instrument for characterizing stress corrosion cracks in pipelines. While a significant improvement over conventional magnetic particle inspections, the eddy current method as it was developed in these programs is limited to use for inspections of pipelines from the outside surface. This paper examines the possibility of using this low frequency eddy current equipment to detect and size stress corrosion cracks from the interior of the pipeline by magnetically saturating the pipeline to reduce its permeability and thereby increase penetration of the eddy currents into the pipe.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

14A

Chapter

Chapter 1: Standard Techniques

Section

Eddy Currents

Pages

323-330

DOI

10.1007/978-1-4615-1987-4_37

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Low Frequency Eddy Currents with magnetic Saturation for In-Line Detection and Sizing of Stress Corrosion Cracks

Snowmass Village, CO

Under previous programs for the Pipeline Research Committee, Battelle has developed and field tested a low frequency eddy current instrument for characterizing stress corrosion cracks in pipelines. While a significant improvement over conventional magnetic particle inspections, the eddy current method as it was developed in these programs is limited to use for inspections of pipelines from the outside surface. This paper examines the possibility of using this low frequency eddy current equipment to detect and size stress corrosion cracks from the interior of the pipeline by magnetically saturating the pipeline to reduce its permeability and thereby increase penetration of the eddy currents into the pipe.