I ka ʻoihana metallurgical, hoʻohana nui ʻia lākou i ka kānana wai metala, hoʻomaʻemaʻe kinoea flue, kānana kinoea, a me ka kānana lalo.ʻO ke kaiapuni hana ʻino loa o ka ʻoihana metala e pono ai ke kānana ʻana i nā huahana e loaʻa i ke kūpaʻa kiʻekiʻe, ka pale ʻana i ka corrosion, a me ke kūpaʻa ʻaʻahu e hōʻoia i ka hana paʻa o nā mea hana metala a me ke ʻano kiʻekiʻe o ka hana waiwai.