Ukufudumalakuthetha inkqubo yokutshisa i-welds yonke okanye kwiindawo ze-weld phambi kwe-welding. Ingakumbi imathiriyeli efanelekileyo yokuwelda inqanaba lamandla aphezulu, ukuqina kwentsimbi, ukuguquguquka kwe-thermal, ubukhulu be-welds enkulu, kwaye xa iqondo lobushushu elisezantsi lisezantsi kakhulu, indawo ye-welding ihlala ifuna i-butt ukuba ifudumale phambi kwe-welding.

Injongo yokushisa kwangaphambili kukunciphisa isantya sokupholisa kwamalungu adibeneyo kunye nokushisa kwangaphambili. Inokubonwa etafileni, ukufudumala kunokunciphisa izinga lokupholisa, kodwa akuzange kube nefuthe ixesha lokuhlala kwiqondo lokushisa eliphezulu, elinqweneleka kakhulu. Ngoko xa ukuwelda intsimbi kunye ukuthambekela ukuqina, ukunciphisa izinga lokupholisa kunciphisa ukuqina utyekelo amanyathelo eziphambili inkqubo, kukufudumala, kunokuba ukwandisa igalelo amandla.