ISO 9304:1989

Seamless and welded (except submerged arc-welded) steel tubes for pressure purposes — Eddy current testing for the detection of imperfections

Is applicable to the inspection of tubes with an outside diameter greater than or equal to 4 mm and includes two different acceptance levels. Specifies general requirements, method of test, reference standards, reference notch, equipment calibration and checking, acceptance and test report. Annex A contains notes on limitations of the eddy current test method.