Bututun ƙarfe mara ƙarfi don ƙananan tukunyar jirgi mara ƙarfi da matsakaici (GB3087-2018) ne high quality carbon tsarin karfe zafi-birgima da sanyi-ja (bididdige) sumul karfe shambura, wanda aka yi amfani da Manufacturing superheated tururi bututu, tafasasshen ruwa bututu don daban-daban Tsarin na low da matsakaici matsa lamba boilers da superheated tururi bututu, babban hayaki bututu, kananan hayaki bututu da baka bututu ga locomotive boilers.

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.