Yenziwe ngezinto ezahlukahlukene,
ikakhulukazi insimbi ethambile, insimbi, insimbi engagqwali, i-aluminium, insimbi, njll.
Isetshenziswa njengezinto zokuqinisa insimbi ku-petroleum, embonini yamakhemikhali kanye nemihlobiso yokwakha,
ukuvikela zonke izinhlobo zemishini, izinto zikagesi, amawindi kanye nokuzalanisa kwemikhiqizo yasemanzini.