Hana ʻia nā paipu kila kalapona maʻemaʻe me nā ʻāpana kila a i ʻole nā billet paʻa ma o ka perforation e hana i nā capillaries, a laila hoʻowili wela, ʻōwili anu a huki anu.He kuleana koʻikoʻi ka paipu kalapona ʻole ma ka ʻoihana paipu kila o koʻu ʻāina.Wahi a nā ʻikepili piha ʻole, ʻoi aku ma mua o 240 mau mea hana paipu hao kalapona ʻole ma koʻu ʻāina, ʻoi aku ma mua o 250 mau pūʻulu o nā hui paipu kalapona kila ʻole, a me ka mana hana makahiki ma kahi o 4.5 miliona mau tona.Mai ka manaʻo o ke anawaena, <φ76, helu no 35%, <φ159-650, helu no 25%.Ma keʻano o nāʻanoʻano,ʻo nā paipu kumu nui he 1.9 miliona tons, he 54%;ʻO nā paipu aila he 760,000 tona, he 5.7%;ʻO nā struts hydraulic a me nā paipu pololei he 150,000 tons, he 4.3%;na paipu kuhilihi, paipu halihali, a me na paipu kaa otomobile he 50,000 tona.tona, he 1.4%.