Maʻemaʻe ʻole: hou ʻia, kiʻi hou ʻia, hoʻopili ʻia (multi-pass circulation process)
Welded: welded longitudinally, huki hou, annealed (multi-pass circulation process)
Hoʻopili ʻia: ʻO ka paipu ka ʻeha i hoʻopaʻa ʻia ma luna o nā pahu metala / lāʻau a i ʻole nā wili.
Hoʻopili ʻia nā pahu a pau a i ʻole nā wili i loko o nā pahu lāʻau no ka maʻalahi o ka hana logistic.