Acetylene qhov kev txwv tawg yog nyob nruab nrab 2.5% thiab 80%, qhia tias kev tawg tuaj yeem tshwm sim thaum nws cov concentration hauv huab cua nyob hauv cov ciam teb no. Tshaj qhov pib no, ignition yuav tsis ua rau tawg.
Hauv kev nthuav dav, acetylene concentrations dhau 80% los yog hauv qab 2.5% yuav tsis ua rau muaj kev tawg, txawm nrog ib qho chaw ignition.