Recommended Practices for the Welding of Rails and Related Rail Components for Use by Rail Vehicles
standard by American Welding Society, 10/07/2003

Specification for AWS Certification of Radiographic Interpreters, Includes Amendment 1
standard by American Welding Society, 03/18/2016

Specification for Qualification and Certification for Entry Level Welders
standard by American Welding Society, 01/01/2004