Circumferential weld always done before Longitudinal weld? Please Explain
LS must be done NDT before assembly the CS joint.
Follow sequence fabrication:
- Easy assembly, fitting-up, weld, and alignment.
- Easy repair weld joint (if failure)
NDT and acceptance criteria:
- Random or spot RT: T junction joints are normally selected 100% RT at last 300mm.
- Almost weld imperfections or defects found at T junction.
C seam weld always carried out in the last stage of fabrication. It will aid inspection and NDT