Shenhai Explosion-Ubungqina
Ukukhanyisa okungagqabhukiyo kuhlelwe ngokweendidi ezintathu: IIA, IIB, kunye ne-IIC.
Iklasi IIA
Ilungele iindawo ezinezinto ezifana nepetroli, ezifana nezikhululo zegesi. Irhasi emele olu didi yipropane.
Iklasi IIB
Isetyenziswa kwiifektri ngokubanzi apho kukho iigesi ezinobungozi. Ethylene yirhasi emele olu luhlu.
Iklasi ye-IIC
Yenzelwe iifektri ezivezwe kuzo ihydrogen, iacetylene, okanye carbon disulfide.