Laifukan gama gari na bututun ƙarfe welded:

(1) Karfe mai yadi
Bututun ƙarfe mai shimfiɗaɗɗen bango yana nufin ɓangaren giciye ya kasu gida biyu, saman faren ƙarfe da aka fallasa yana nuna tsatstsauran matsayi na matsayi. Wasu suna nuni a ciki da waje na karfen da aka soke ko aka ɗaga a gida, ma'ana mai yadudduka an ɗaga ba zato ba tsammani, haƙora ko faɗa a ciki da waje daga cikin walda.
(2) tabo mai danko
Bututu mai tabo yana nufin saman ciki da waje na babban tabo mai mannewa karfe.
(3) ramuka
Bututu ta cikin rami yana nufin akwai ramukan bututun ƙarfe na gida.
(4) budaddiyar walda
Buɗe bututun ƙarfe na ƙarfe yana nufin ta hanyar dogayen fasa a cikin walda na ƙarfe ko nunin ɓangarori na.
(5) Waldayan cinya na gida
Welded karfe bututu yana nufin wani bangare na waje surface na karfe bututu gabatar da wani bangare na baka weld.
(6) Ramin walda
Bututu walda tsagi ne m surface na karfe bututu faruwa ta wani dogon tsagi weld.
(7) rushewar walda
Rushewar bututun ƙarfe na walda yana nufin saman kwarangwal ɗin ƙarfe na walda wanda ke nunawa ta cikin rami mai tsayi, inda saman gefuna masu kama da juna.
(8) guguwar bututun da aka rushe
Karfe tube hadin gwiwa dislocation yana nufin karfe bututu weld, ya faru da sabon abu na staggered sama da ƙasa.