The 2007 edition of AWS A2.4 Standard Symbols for Welding, Brazing and Nondestructive Examination provides users with important detailed information and criteria that establish the proper methods for specifying certain welding, brazing, and nondestructive examination information by means of symbols. The comprehensive information and examples provided in this Standard explain the construction and interpretation of these symbols. Other topics covered in this standard include welding or brazing operations, nondestructive examination, including the examination method, frequency, and extent.