化工檢修可分為計劃檢修與計劃外檢修。

  計劃檢(jian)(jian)(jian)修(xiu)(xiu)(xiu)：企業根(gen)(gen)據設備(bei)管(guan)理(li)、使用的經驗和(he)生產規(gui)律，對設備(bei)進(jin)行有(you)組(zu)織、有(you)準(zhun)備(bei)、有(you)安排的檢(jian)(jian)(jian)修(xiu)(xiu)(xiu)叫做計劃檢(jian)(jian)(jian)修(xiu)(xiu)(xiu)。根(gen)(gen)據檢(jian)(jian)(jian)修(xiu)(xiu)(xiu)內(nei)容、周期和(he)要求的不同(tong)，計劃檢(jian)(jian)(jian)修(xiu)(xiu)(xiu)可分為(wei)小修(xiu)(xiu)(xiu)、中修(xiu)(xiu)(xiu)和(he)大修(xiu)(xiu)(xiu)。  

  計劃(hua)外(wai)檢(jian)(jian)修(xiu)(xiu)：在(zai)生(sheng)產過程中(zhong)設備突然發生(sheng)故(gu)(gu)障或(huo)事(shi)故(gu)(gu)，必須進行的(de)不停(ting)車或(huo)臨時(shi)停(ting)車檢(jian)(jian)修(xiu)(xiu)稱為計劃(hua)外(wai)檢(jian)(jian)修(xiu)(xiu)。計劃(hua)外(wai)檢(jian)(jian)修(xiu)(xiu)事(shi)先難以預料(liao)，無法安排計劃(hua)，而且(qie)要求檢(jian)(jian)修(xiu)(xiu)時(shi)間短、檢(jian)(jian)修(xiu)(xiu)質量高，檢(jian)(jian)修(xiu)(xiu)的(de)環境及工(gong)況(kuang)復雜，故(gu)(gu)難度(du)較大。也是化工(gong)企(qi)業不可(ke)避(bi)免的(de)檢(jian)(jian)修(xiu)(xiu)作業。