Ama-studs ashiselwe kumashubhu kusetshenziswa i-electro resistance welding, ekhiqiza ama-welds ekhwalithi ephezulu.Amashubhu ahlanganisiwe asetshenziswa kakhulu esikhundleni samashubhu afakwe emanzini ezinhlelweni zokudlulisa ukushisa ezitshalweni ze-petrochemical, lapho ingaphezulu lichayeka endaweni egqwala kakhulu njengamagesi angcolile noma uketshezi.Lawa mashubhu kufanele amelane nezinto ezinolaka futhi kufanele ahlanzwe njalo.