Nui nā ʻano opaipu kila kila, me nā hoʻohana like ʻole, nā koi ʻenehana like ʻole, a me nā ʻano hana hana like ʻole. ʻO ke anawaena o waho o ka paipu kila i hana ʻia i kēia manawa he 0.1-4500mm, a ʻo ka mānoanoa o ka pā he 0.01-250mm.
ʻO ka paipu kila kila he mea hollow elongated poepoe kila, i hoʻohana nui ʻia i ka ʻaila, kemika, ka lāʻau lapaʻau, ka meaʻai, ka ʻoihana māmā, nā mea hana mīkini a me nā pipeline ʻoihana ʻē aʻe a me nā mea hana mechanical. Eia kekahi, i ka wā e like ai ke kulou a me ka ikaika torsional, ʻoi aku ka maʻalahi o ke kaumaha, no laila hoʻohana nui ʻia i ka hana ʻana i nā ʻāpana mechanical a me nā hale ʻenekinia. Hoʻohana mau ʻia ʻo ia e like me nā lako a me nā lako kīhini.
ʻO nā waiwai paipu kila kila: ka pale ʻana o ka ʻili ma lalo o 1000M; ʻaʻahu pale; hikiwawe; maikaʻi ke kū'ē kemika; maikaʻi alkali metala a me kaʻakika kūpaʻa; paʻakikī ikaika; pale ahi.