AWS A2.4:2012

This standard presents a system for indicating
welding, brazing, and nondestructive examination requirements.

The system includes provisions for the graphical
representation of welds, brazes, and nondestructive examination
methods with conventions for specifying, at a
minimum, the location and extent of their application.
Optional elements and supplementary symbols provide a
means for specifying additional requirements.

The figures included with the text are intended to show
how the correct format and applications of symbols may
be used to convey welding, brazing, and nondestructive
examination information. They are not intended to represent
recommended welding, brazing, nondestructive
examination, or design practice.

The clause addressing brazing uses the same symbols
that are used for welding. The clause on nondestructive
examination symbols establishes the symbols to be used
on drawings to specify nondestructive examination for
determining the suitability of components. The nondestructive
examination symbols included in this standard
represent nondestructive examination methods as discussed
in the latest edition of AWS B1.10M/B1.10,
Guide for the Nondestructive Examination of Welds. Definitions
and the details for the use of the various nondestructive
examination methods are found in AWS
B1.10M/B1.10.

The limitations included in specifications and codes are
also beyond the scope of this standard.