สามารถติดไฟไดเมื่อผสมกับอากาศ 13 เป

Can be ignited when mixed with air, 13 percent, subdirectory, or lower, by volume, or have a wide range which can fire 12 percent or more when mixed with air, regardless of the minimum concentration of the mixing. Flammable gas is typically heavier than air. Examples of this group, such as gas, acetylene, LPG gas or LPG, etc.

Is flammable when mixed with air, 13 percent. Or less by volume Or a wide range of flammable 12 percent more when mixed with air, regardless of the minimum concentration of the compound. Typically, the gas is heavier than air. Examples of this group of gases, such as acetylene gas, or LNG, LPG, etc.

Can ignite when mixed with air in 13% or less by volume, or has a wide range of that traffic lights 12 percent and above, when mixed with air, regardless of the minimum concentration of blending. Normally flammable gas is heavier than air, the gas sample of this group, such as acetylene LPG หรือก๊าซ LPG etc.