This standard specifies the symbol representation method for non-destructive testing of welds. This standard applies to non-destructive testing of welds. When applying this standard, in principle, it refers to testing the welded parts or components after welding. This standard can also provide reference for the regulation of non-destructive testing symbols for castings or forgings.
GB/T 14693-1993 history
2008GB/T 14693-2008 Non-destrutive testing.Symbolic representation on drawings
1993GB/T 14693-1993 Nondestructive testing symbols for welds