DNV DNV CLASSIFICATION NOTES 7 PDF

Introduction 

Preamble

This Classification Note applies for non-destructive testing for the following methods:

— Eddy current testing

— Magnetic particle testing

— Penetrant testing

— Radiographic testing

— Ultrasonic testing

— Visual testing.

In general, this Classification Note has to be adhered to, as far as applicable, when non-destructive testing is required by the Society. The use of other standards or specifications may, however, be granted if an equivalent testing procedure is ensured or is more fit for the purpose.

Whenever acceptance criteria are defined in the Rules, approved drawings, IACS Recommendations or other agreed product standards, these criteria are mandatory. If no acceptance criteria are defined, acceptance criteria specified in this Classification Note may be applied.

The definitions and requirements stated below may satisfy the need of a written procedure. Where this is not the case, or where the techniques described in this Classification Note are not applicable to the object to be examined, additional written procedures shall be used and accepted by the Society before the testing is carried out.