You may be able to RT one of the 16" production welds and qualify them, depending on the service of the pipe.
API 1104
6.6.1
General
At the company’s option, the qualification butt weld may be examined by radiography in lieu of the tests specified in 6.5.
Watch out now
, because:
49 CFR 192.229
Limitations on welders.
(a) No welder whose qualification is based on nondestructive testing may weld compressor station pipe and components.