Thermal fadada bututu ne karfe sarrafa bututu hanya na musamman ne zafi fadada yin amfani da na'ura mai aiki da karfin ruwa da inji ko inji yana kira da karfe bututu daga karfe bango tare da radially waje dilatation gyare-gyaren matsa lamba sarrafa fasahar. Mechanical nufin fiye da na'ura mai aiki da karfin ruwa hanyoyin, na'urorin, sauki da kuma karin iko a duniya manyan kai-da yawa manyan-caliber kabu welded bututu fadada sarrafa iko aka zaba.

Hanyar sarrafa bututun faɗaɗa thermal, ita ce ƙananan bututun da ke sarrafa babban bututun diamita. Thermal fadada bututu zafi-birgima karfe inji Properties fiye da ɗan ƙasa. Limited ga misali karfe sumul karfe bututu yana da iyaka, bisa ga karshen-mabukaci bukatar thermal fadada bututu haka aka haife shi, thermal fadada bututu sabani misali model ne in mun gwada da girma, yawanci bisa abokin ciniki bukatun da masana'antu, thermal fadada bututu ne, mu sau da yawa ce thermal fadada bututu, da yawa ne in mun gwada da low, amma gajarta da karfi karfe bututu, (sumul karfe bututu) za a iya koma zuwa thermal fadada.