Bututun ƙarfe mara nauyi don ƙananan matsa lamba da matsakaitan tukunyar jirgi (GB3087-2018) ne high quality carbon tsarin karfe zafi-birgima da sanyi-ja (birgima) sumul karfe shambura, wanda ake amfani da Manufacturing superheated tururi bututu, ruwan zãfi ga daban-daban Tsarin na low da matsakaici matsa lamba boilers da superheated tururi bututu, babban hayaki bututu. , ƙananan bututun hayaƙi da bututun bulo na baka don masu tukwane.

Ƙarshen bututun ƙarfe ya kamata ya kasance daidai da axis na bututun ƙarfe, kuma ya kamata a cire burrs.GB3087misali karfe bututu ne kullum Ya sanya daga 10, 20 zafi birgima ko sanyi birgima high quality carbon tsarin karfe, yawanci bukatarruwa matsa lambae, crimping, flaring, lallashida sauran gwaje-gwaje don tabbatar da ingancin samfur da aiki.