Itanki yokugcina sisitya esikhulu esisetyenziselwa ukubamba ulwelo okanye iigesi, ziqhele ukudityaniswa kwentsimbi okanye iplastiki. Ziqhele ukusetyenziswa kuseto lwemizi-mveliso ukubamba iintlobo ezahlukeneyo zolwelo okanye izinto zegesi, kubandakanya ipetroleum, iikhemikhali, amanzi, irhasi yendalo, njalo njalo.