Menene bututun ƙarfe mara ƙarfi mai ƙarfi
Bututun ƙarfe mara ƙarfi mara ƙarfi da bututun tukunyar jirgi mai ƙarfi nau'in bututun tukunyar jirgi ne kuma suna cikin nau'in bututun ƙarfe mara ƙarfi. Hanyar masana'anta iri ɗaya ce da na bututu maras kyau, amma akwai ƙaƙƙarfan buƙatu don nau'in ƙarfe da ake amfani da shi wajen kera bututun ƙarfe. Sau da yawa ana amfani da bututun tukunyar jirgi mai ƙarfi a ƙarƙashin yanayin zafi da matsanancin yanayi. Ana amfani da bututu mai zafi mai zafi don kera bututun mai zafi, bututun sake zafi, bututun jagorar iska, manyan bututun tururi, da sauransu don matsa lamba da matsananciyar matsin lamba.

Babban amfani da manyan bututun ƙarfe mara ƙarfi
① High-matsi sumul karfe bututu aka yafi amfani da su sa ruwa-sanyaya bango bututu, tafasasshen ruwa bututu, superheated tururi bututu, superheated tururi bututu for locomotive tukunyar jirgi, manyan da kananan hayaki bututu baka bututu, da dai sauransu.
② An fi amfani da bututun ƙarfe mara ƙarfi mai ƙarfi don kera bututun wutar lantarki, bututun reheater, bututun jagorar iska, manyan bututun tururi, da sauransu don matsa lamba mai ƙarfi da matsananciyar matsin lamba.