ʻO ka paipu kila kila he ʻano puʻupuʻu kila lōʻihi lōʻihi, ka mea i hoʻohana nui ʻia i nā pipeline kaʻa ʻoihana e like me ka petroleum, ka ʻoihana kemika, ka lāʻau lapaʻau, ka meaʻai, ka ʻoihana māmā, nā mea hana mechanical, a me nā mea hana mechanical.