Hoob Kawm Kuv hluav taws xob tsis adhere to ib specific grading lawv.
Rau Hoob Kawm II hluav taws xob khoom, kev faib ua ntej yog txiav txim tau los ntawm hom flammable roj ces yuav tsum. Cov khoom no ntxiv categorized rau hauv peb tawg-pov thawj: IIA, IIB, thiab IIC.
Nyob rau tej cheeb tsam utilizing Hoob Kawm Kuv hluav taws xob khoom, Qhov twg combustible gases uas tsis yog methane tam sim no, Ua raws li ob hoob kawm kuv thiab hoob kawm II tawg-pov thawj yog mandatory.
Raws li cov khoom uas muaj zog ntawm cov khoom explosive plua plav, Hoob kawm III hluav taws xob khoom yog segmented rau hauv peb pawg: IIIA, IIIB, thiab IIIC.