Paipu kila kilahe ʻano hao hao, elongated, cylindrical i hoʻohana nui ʻia ma ke ʻano he paipu no ka lawe ʻana i nā wai.Hoʻohana nui ʻia ia i nā pipeline ʻoihana e like me ka petroleum, chemical, medical, food, light industry, mechanical instruments, and mechanical structural parts.ʻO nā paipu kila kila i hana ʻia me nā billet kila o ka waika a me nā māka pale wela, i hoʻomehana ʻia, perforated, nui, ʻōwili wela, a ʻoki ʻia.