Here's an interesting twist -
Check out Table 4.10 Welder and Welding Operator Qualification..... number...range....thickness...... qualified.
If a welder performs a Test Weld per Option 3 (Fig. 4.20) (any diameter pipe), it requires not 3, but only 1 macroetch and no destructive testing.
I haven't found an "option 3" in the codes prior to 1996.
add- (using the cross reference in the 1996 code ) 5.10.3 in the interpretation became 4.11.1, and 5.17.1.2 became 4.18.3