He ʻano paipu humuhumu ʻole ka paipu paila. Ua like ke ʻano hana me ka paipu humuhumu ʻole, akā aia nā koi paʻa no ke ʻano kila i hoʻohana ʻia no ka hana ʻana i ka paipu kila. Wahi a ka hoʻohana ʻana i ka mahana, ua māhele ʻia i ʻelua ʻano o ka paipu paila maʻamau a me ka paipu paila kaomi kiʻekiʻe.

ʻO ka waiwai mechanical o ka paipu paila he ʻōkuhi koʻikoʻi ia e hōʻoia i ka lawelawe hope loa o ke kila. Aia ia i ka haku mele kemika o ke kila a me ka ʻōnaehana mālama wela. Ma ke kūlana paipu kila, e like me nā koi hoʻohana like ʻole, ua hoʻopaʻa ʻia nā waiwai tensile (ikaika tensile, ikaika hua a i ʻole kiko hua, elongation) a me ka paʻakikī, nā hōʻailona paʻakikī, a me nā koi o ka mea hoʻohana no ka hana wela kiʻekiʻe a haʻahaʻa.

① ʻO ka mahana o ka paipu paila maʻamau ma lalo o 350 ℃, ʻo ka paipu home ka mea nui i hana ʻia me ka paipu ʻōwili wela kila kalapona No. 10, no. 20 a i ʻole ka paipu huki anu.

Paipu paila

Paipu paila

(2) Hoʻohana pinepine ʻia nā paipu paila kiʻekiʻe ma lalo o ke kiʻekiʻe o ka mahana a me ke kaomi kiʻekiʻe. Ma lalo o ka hana a ke kinoea flue wela kiʻekiʻe a me ka mahu wai, e hana ʻia ka oxidation a me ka corrosion. Pono ka paipu kila e loaʻa i ka ikaika paʻa kiʻekiʻe, ke kūpaʻa kiʻekiʻe o ka oxidation corrosion a me ke kūpaʻa microstructure maikaʻi.