Billet ɗin da ake amfani da shi wajen samar da bututun ƙarfe ana kiransa tube billet. Yawancin lokaci ana amfani da ƙarfe mai ƙarfi (ko gami) mai ƙarfi mai ƙarfi azaman billet ɗin bututu. A cewar daban-daban samar da hanyoyin, sumul tubes da billets sanya daga karfe ingots, ci gaba da simintin gyare-gyaren, ƙirƙira billlets, billet billet da centrifugally jefa m billets.Tun da ingancin tube billet fi mayar kayyade ingancin da sumul karfe tube, da shirye-shiryen tube billet yana da mahimmanci musamman.

Gabaɗaya, ɗigon bututu yana nufin billet ɗin zagaye. Girman bututun billet ɗin zagaye yana wakilta da diamita na ƙaƙƙarfan ƙarfe zagaye. Shirye-shiryen billet na Tube ya haɗa da zaɓi na samfurin billet na bututu da ƙayyadaddun bayanai, ƙirar sinadarai da duba tsarin, duba lahani da tsaftacewa, yanke, tsakiya, da sauransu.
Production tsari na sumul karfe tube billet ne kamar haka:

Ƙarfe - Ƙarfe - Buɗaɗɗen Ƙarfe na Hearth (ko Ƙarfe na Wuta na Wuta da Oxygen Blowing Karfe) - Ingot - Billeting - Mirgine Zagaye Bar - Tube Billet

A) Rarrabe nau'ikan bututun bututu maras sumul

Za'a iya rarraba bututun bututu maras sumul bisa ga hanyar sarrafawa, tsarin sinadarai, hanyar kafa, yanayin amfani, da sauransu na bututun ƙarfe.
Alal misali, bisa ga hanyar magani, ana iya raba shi zuwa wutar lantarki tanderu karfe bututu billet, Converter karfe bututu billet da electroslag karfe bututu billet; bisa ga hanyar kafa, ana iya raba shi zuwa karfe ingot, ci gaba da simintin bututu billet, jabun bututun billet, billet ɗin bututu mai billet da bututun simintin centrifugal. Bisa ga abun da ke tattare da sinadaran, ana iya raba shi zuwa bututun bututun karfe, gami da bututun bututun karfe, bututun bututun bakin karfe da kuma bututun bututu mai jure lalata; Bututun hakowa da hakowa na ƙasa, bututun bututun taki, bututun bututu mai ɗaukar nauyi, da sauran bututun bututun maƙasudi na musamman.

B) Zaɓin bututun bututu maras sumul

Zaɓin nau'ikan bututun ƙarfe maras nauyi ya haɗa da zaɓin ma'aunin ƙarfe, ƙayyadaddun bayanai, hanyoyin narkewa da hanyoyin ƙirƙirar.
Zaɓi makin karfe, hanyoyin sarrafawa da hanyoyin ƙirƙira bisa ga ƙa'idodin samfur ko oda yanayin fasaha. Zaɓin girman billet ya dogara ne akan gano madaidaicin girman billet a cikin tebur na birgima gwargwadon girman bututun ƙarfe.

Gabaɗaya, masana'antar bututun ƙarfe maras sumul suna amfani da ingantaccen ƙarfe mai canzawa ko ƙarfe na tanderun lantarki don ci gaba da yin simintin gyare-gyare.
Lokacin da darajar karfe ko ƙayyadaddun bayanai ba za a ci gaba da yin jifa ba, narkakkar karfe ko simintin simintin gyare-gyaren ana yin shi zuwa madaidaicin billet. Lokacin da girman bututun ba zai iya cika buƙatun ma'auni na matsawa ba, za'a iya zaɓar mafi girman girman bututun bututu kuma a yi birgima ko ƙirƙira don zama babur bututu wanda ya dace da girman buƙatun. Ƙididdigar ƙididdiga na ƙimar matsawa shine kamar haka: K = F, 1F inda K shine rabon matsawa; F — - yanki na giciye na bututu mara kyau, mm; F ——yankin giciye na bututun ƙarfe, mm.

Lokacin da akwai tsauraran bukatu akan daidaiton bututun babu komai, abun ciki ko abun ciki na hada da iskar gas, ana amfani da bututun blank da aka narke ta hanyar electroslag ko injin degassing tanderu.