Codes and specifications often require that welds be subjected to spot or random radiography, ultrasonic or other examination methods.
The purpose of this standard is to:
Examine the expectations, effectiveness and limitations of random examination.
Identify common industry practices and methods for specifying random examination.
Provide guidance in establishing and defining the size of a lot to be subjected to random examination, focusing on the ASME B31.3 use of the terms “lot” and “kind of item.”