Paipu kila maʻemaʻe ʻole - ka hui aliʻi

1. ʻO ka'ōwili wela (extrusion seamless steel paipu): puʻupuʻu pōʻai blank → hoʻomehana → perforating → ʻekolu-kiʻekiʻe diagonal rolling, hoʻomau i ka ʻōwili a extrusion → wehe ʻia → sizing (a hōʻemi paha) → hoʻoluʻu → straightening → hydrostatic test (a i ʻole nānā) → kaha → waihona
ʻO ka mea maka o ka ʻōwili liʻiliʻi o ka ʻōpala he poepoe tube billet, ʻoki ʻia a hoʻōla ʻia e ka mīkini ʻokiʻoki me ka ulu ʻana o kahi 1 mika blank, a hoʻouna ʻia i ka umu e ka conveyor belt embryo. Hāʻawi ʻia ka billet i loko o ka umu ahi a hoʻomehana ʻia a hiki i 1200 degere Celsius. He hydrogen a acetylene ka wahie. ʻO ka hoʻomalu wela i ka umu ahi ka pilikia nui. Ma hope o ka puka ʻana mai o ka puʻupuʻu pōʻai pōʻai, ua ʻūhā ʻia e ka puʻi kaomi. ʻO ka mea maʻamau, ʻo ka perforator maʻamau ʻo ka conical roll perforator. Loaʻa i kēia ʻano perforator ka hana kiʻekiʻe, ka maikaʻi o ka huahana, ke anawaena perforating nui a hiki ke komo i nā ʻano kila like ʻole. Ma hope o ka perforation, ʻolokaʻa ʻia ka billet puʻupuʻu poepoe e ʻekolu diagonal kiʻekiʻe, ʻōwili mau a extrusion paha. Ma hope o ka extrusion, pono e wehe ʻia ka paipu no ka nui. Hoʻololi ka caliper i loko o ka embryo kila ma o kahi drill conical i ka wikiwiki kiʻekiʻe e kuʻi i nā lua a hana i nā paipu kila. Hoʻoholo ʻia ke anawaena o loko o ka paipu kila e ka lōʻihi o waho o ke anawaena o ka bit caliper drill. Ma hope o ka nui ʻana o ka paipu kila, komo ia i loko o ka hale hoʻomaha a hoʻomaʻalili ʻia e ka pipi ʻana i ka wai. Ma hope o ka hoʻoluʻu ʻana i ka paipu kila, e hoʻopololei ʻia.
2. Piula kila liʻiliʻi i huki ʻia i ke anu (olokaʻi ʻia): puʻupuʻu pōʻaiapuni blank → hoʻomehana → perforation → poʻomanaʻo → annealing → pickling → ʻaila ʻaila (ka uhi keleawe) → kaha kiʻi anuanu (cold rolling) → pahu blank → mālama wela → hoʻoponopono → hōʻike hydrostatic (nānā) → hōʻailona → mālama.
ʻOi aku ka paʻakikī o ke ʻano o ka ʻōwili ʻana o ke kaha kiʻi anuanu (rolling) ʻoi aku ka paʻakikī ma mua o ka ʻōwili wela (extrusion) paipu kila ʻole. ʻO nā ʻanuʻu mua ʻekolu o kā lākou kaʻina hana hana like. ʻO ka ʻokoʻa mai ka hā o ka ʻanuʻu, ʻo ka pahu poepoe paʻa ma hope o ke kuʻi ʻana, a hiki i ke poʻo, annealing. Ma hope o ka annealing, hoʻohana ʻia ka wai waikawa kūikawā no ka pickling. Ma hope o ka pickling, hoʻohana ʻia ka ʻaila. Hoʻopili ʻia kēia me ka mālama wela kūikawā o ka paipu rebillet ma hope o ke kaha kiʻi anu (cold rolling). Ma hope o ka mālama ʻana i ka wela, hoʻopololei ʻia.