Seamless: voatsindrona, redrawn, annealed (multi-pass circulation process)
Welded: longitudinal welded, redrawn, annealed (multi-pass circulation process)
Fonosana: Ny fantsona dia ratra mihodinkodina amin'ny amponga vy / hazo na spools.
Ny amponga na spool rehetra dia fenoina ao anaty vata hazo mba ho mora ny fampandehanana ny lozisialy.