This standard applies to butt joints welded with fusion processes on aluminum and aluminum alloy sheets and tubes ' '. The term pipe is intended to include other cylindrical bodies, such as longitudinally welded pipes, pressure vessels, tanks, etc.
UNI 7452-1975 history
1975UNI 7452-1975 Aluminum and aluminum alloy head-to-head welding casing with thickness up to 50mm. X-ray radiation inspection