I-flange yinxalenye edibeneyo phakathi kombhobho kunye nombhobho, esetyenziselwa ukudibanisa phakathi kokuphela kombhobho kunye nokungenisa kunye nokuthumela ngaphandle kwezixhobo.I-flange ludibaniso olunokudityaniswa lweqela lesakhiwo sokutywina.Umahluko kuxinzelelo lweflange kuya kubangela ukuba ubukhulu kunye nokusetyenziswa kweebholithi kuya kwahluka.