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Alternating Current Field Measurement Testing

ALTERNATING CURRENT FIELD MEASUREMENT (ACFM)

ACFM or Alternating Current Field Measurement is used in order to identify and size surface breaking cracks in metal components. This electromagnetic technique has several benefits. ACFM may be utilized on coated materials. The coatings must be strictly adhered to the surface in order to perform the test successfully. Also, the test can be performed if the surface contains minor scaling and debris which eliminates the need for pre-cleaning prior to inspection. Test indications can be sized to show depth and length of indications. Lastly, the test can be performed at elevated temperatures as high as 900° degrees Fahrenheit.

ACFM has been used extensively in off shore platform applications on piping and structural members. Process piping in Oil and Gas facilities have successfully utilized ACFM also. Bridges and large Cargo cranes have also benefited from the ability to rapidly inspect and size defects in the field using ACFM.

Please contact your experts at MISTRAS Services to customize an ACFM inspection program for you.
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