Kupanga kozizira kojambula mafuta a petroleum kutha kukhala kozizira, kukokedwa, kuzizira, kupanga kusakaniza kozizira. Pogwiritsa ntchito zojambulazo, zida zosavuta, ndalama zochepa, ntchito yosavuta ndi kukonza ndi zina zotero. Koma drawback ndi sitepe yapakati ambiri, mitengo matabwa. Kugwiritsa ntchito zipangizo ozizira ndondomeko ndi zovuta, ndi ndalama zambiri, koma akhoza kuchepetsa njira wapakatikati, kusintha zokolola, mkulu msokonezo zitsulo mankhwala kukula, ndi kulondola pamwamba, makamaka mkulu-mwatsatanetsatane msokonezo ndi kwambiri woonda-mipanda msokonezo chubu.

Chifukwa cha zofooka mphero mpukutu chiphaso ndi chiwerengero ndi mtengo wa specifications yomalizidwa mankhwala sangakhale kwambiri; ozizira adagulung'undisa ndi ozizira kukopeka olowa kupanga ndondomeko kubala chomalizidwa, ndi zabwino zitsulo processing mkombero nthawi yochepa, kuchepetsa wapakatikati degreasing, kutentha mankhwala, kukomoka, Jiao njira molunjika, kupulumutsa mphamvu, kuchepetsa mowa zitsulo, zochepa yaiwisi specifications ndi choncho. Mafuta osokoneza chubu akhoza kukhala ozizira kukokedwa pickling asidi, asidi hydrochloric, asidi wothira, asidi hydrofluoric ndi zina zotero. Chitsulo cha carbon ndi aloyi chitsulo chosasunthika moyenerera sulfuric acid, chitsulo chapamwamba kwambiri cha carbon structural steel ndi aloyi zitsulo zopanda msoko zoyenererana ndi hydrochloric acid.