1. Ubude benqwaba kulula ukulungisa. Ubude beizinqwaba zeshidi lensimbiinganwetshwa noma isikwe njengoba kudingeka.
2. Ukuxhumana kwesixhumi kulula kakhulu. Ingafakwa nge-welding kagesi, okulula ukuyisebenzisa, amandla aphezulu futhi ephephile ukuyisebenzisa.
3. Inani lenhlabathi elahliwe lincane futhi linomthelela omncane ezakhiweni eziseduze (izakhiwo). Ngenxa yokuvuleka ekugcineni kwenqwaba, inhlabathi izokhanywa epayipini lenqwaba lapho inqwaba iqhutshwa. Uma kuqhathaniswa nezinqwaba zangempela, inani lenhlabathi ekhanyiwe liyancipha kakhulu, libangela ukuphazamiseka okuncane esisekelweni esizungezile, ligwema ukuphakanyiswa kwenhlabathi, futhi linciphise kakhulu imiphumela yokugudluka okuqondile kanye nokugudluzwa okuvundlile kwenqwaba ephezulu.