Fadada thermalbututu mara nauyiyana ɗaukar fasahar haɓakawa na bututu na asali. Fadada tsarin sarrafa matsa lamba ne wanda ke amfani da na'ura mai aiki da karfin ruwa ko injina don tilasta bututun karfe don fadada waje tare da radial. Hanyar injiniya ta fi sauƙi kuma mafi inganci fiye da hanyar hydraulic. An karɓi tsarin fadada bututun bututun da ya fi ci gaba a duniya. Tsarin shine:

The inji fadada diamita ne kumbura a cikin radial shugabanci da segmented fan-dimbin yawa block a karshen fadada na'ura, sabõda haka, da tube blank ne stepwisely kafa a cikin wani stepwise hanya don gane aiwatar da filastik nakasawa na dukan bututu tsawon. don haka samar da bututun ƙarfe mara ƙarfi wanda aka faɗaɗa thermally. An kasu kashi 5:

1. Matakin zagaye na farko: Ana buɗe shinge mai siffar fan har sai duk tubalan masu siffar fan sun hadu da bangon ciki na bututun ƙarfe. A wannan lokacin, radius na kowane wuri a cikin bututun ciki na bututun ƙarfe kusan iri ɗaya ne a tsayin mataki, kuma bututun ƙarfe an fara zagaye.
2. Matsayin diamita na ciki na ƙididdigewa: Tsarin fan yana rage saurin motsi daga matsayi na gaba har sai ya kai matsayin da ake buƙata, wanda shine yanayin kewayen ciki na samfurin da aka gama na ingancin da ake bukata.
3. Lokacin ramuwa na gyaran gyare-gyare: Tushe mai siffar fan yana farawa a cikin ƙananan gudu a cikin matsayi na 2 har sai ya kai matsayin da ake bukata, wanda shine matsayi na ciki na ciki na bututun ƙarfe kafin sake dawo da tsarin tsari.
4. Matsayin daidaitawa na matsa lamba: Ƙarƙashin siffar fan ya kasance a cikin matsayi na ciki na bututun ƙarfe na tsawon lokaci kafin sake dawowa, wanda shine matakin daidaitawa da ake buƙata ta kayan aiki da tsarin fadadawa.
5. Lokacin dawowar saukewa: An cire shinge mai siffar fan da sauri daga wurin dawafi na ciki na bututun karfe kafin a sake dawowa, har sai an kai matsayin fadadawar farko, wanda shine mafi ƙarancin raguwa na ɓangaren da ake buƙata ta hanyar fadadawa. .

A cikin aikace-aikacen aikace-aikacen, a cikin sauƙaƙe tsari, ana iya haɗa matakan 2 da 3 da sauƙi, wanda ba shi da tasiri akan diamita na bututun ƙarfe.