ʻO ka paipu kila kila he ʻano paipu kila humuhumu, i māhele ʻia i loko o ka paipu kila humuhumu kūkulu a me ka paipu kila kila kiʻekiʻe. ʻOkoʻa loa mai nā kūlana hana a me ka ʻoihana o nā paipu kila kila, hoʻololi nā paipu kila kila i hoʻopaʻa ʻia a hoʻomaʻamaʻa ʻia i nā waiwai mechanical. Hoʻokō i nā kūlana hana e pono ai. ʻOi aku ka kiʻekiʻe o kāna hana ma mua o ka paipu kila kila humuhumu maʻamau, loaʻa i ka hoʻohuihui kemika ka nui o Cr, no laila he kūpaʻa wela kiʻekiʻe, kūpaʻa haʻahaʻa a me ke kūpaʻa i ka palaho. ʻAʻohe paipu kila a i ʻole kahi liʻiliʻi o ka mea kila i loko o nā paipu kalapona maʻamau. Hoʻohana nui ʻia ka paipu kila kila i ka petroleum, aerospace, kemika, ka mana uila, ka paila, ka pūʻali koa a me nā ʻoihana ʻē aʻe, no ka mea, he loli nā waiwai mechanical o ka paipu kila kila, maʻalahi ke hoʻoponopono.

Hoʻohana nui ʻia ka paipu kila kila i loko o nā mea kanu mana, nā mea kanu mana nukelea, ka paila kaomi kiʻekiʻe, ka superheater wela kiʻekiʻe, ka reheater a me nā paipu a me nā lako hana kiʻekiʻe a me ke kaomi kiʻekiʻe. Hana ʻia ia me ke kila kalapona kiʻekiʻe, ke kila kūkulu alloy a me ke kila kūpaʻa wela kila kila ma ka ʻōwili wela (extrusion, hoʻonui) a i ʻole ka ʻōwili anu (kaha kiʻi).