'Owili wela (extrusion seamless steel pipe): puʻupuʻu pōʻai → hoʻomehana → ​​perforation → → ʻōwili ʻekolu, ʻōwili a extrusion → wehe ʻia → hoʻonui ʻia (a hōʻemi paha) → hoʻomaʻamaʻa → ​​hoʻomaʻamaʻa hydraulic (orflaw) → tag → waiho.

ʻO ka ʻōpuʻu ʻole o nā mea maka ʻo ia ka puʻupuʻu poepoe, hele nā ​​embryos i loko o kahi mīkini ʻoki e ʻoki i ka ulu ʻana o ke degere ma kahi o 1 mika, a hoʻouna ʻia e ka conveyor belt furnace heat.Hāʻawi ʻia ʻo Billet i loko o ka umu wela, ʻo ka mahana ma kahi o 1200 degere Celsius.He wahie no ka hydrogen a acetylene paha.He mea koʻikoʻi ka hoʻomalu ʻana i ka wela o ka umu e ʻaʻahu i ka paipu ea a puni, ma hope o ka hoʻokuʻu ʻia ʻana o ka puncher kaomi.ʻO ia ka mea maʻamau maʻamau i ka puncher tapered roller punch i kēia kuʻi, kiʻekiʻe o ka hana ʻoi aku ka maikaʻi, ka maikaʻi o ka huahana, perforated hoʻonui leo, me nā ʻano kila like ʻole.Ma hope o ka perforation, ua ʻekolu ʻōwili keʻa i ka paipu poepoe, ʻolokaʻa a extrusion paha.Ma hope o ka wehe ʻana i ka nui o ka paipu.ʻO ka wili nui ʻana i ka wili kiʻekiʻe o ka pahu pahu i loko o ka punch Billet e hana i kahi paipu kila.Hoʻoholo ʻia ke anawaena o loko o ka paipu kila e ka lōʻihi o ke anawaena o waho o ka drill mill sizing.Ma hope o ka hoʻonui ʻana, ʻo ka paipu kila e komo i ka hale hoʻoluʻu ma o ka hoʻoheheʻe ʻana i ka wai, ka paipu kila ma hope o ka hoʻoluʻu ʻana, pono e hoʻopololei.Hoʻouna ʻia e ka paipu conveyor ma ka hoʻopololei ʻana i ka mīkini ʻike metala (a i ʻole ka hoʻāʻo hydrostatic) e hana i kahi hemahema o loko.E ʻike ʻia nā pilikia i loko o ka paipu kila e like me nā māwae, nā ʻōhū.ʻO ka nānā ʻana i ka maikaʻi o ka paipu kila akā ma o ke koho lima ikaika.Paipu kila o Quality Supervision, Inspection, hoʻohana i ka pena ehu ma ka helu, ka nui, ka hui hana.Ma ke kaʻa uwea e kau ana i loko o ka hale kūʻai.