There is no doubt that you can't consider this problem in isolation. It is true that pure gas, whether acetylene or oxygen, will not explode. But once oxygen and acetylene break through the bondage, it is not a simple matter. To know that oxygen is extremely combustion-supporting, a little Mars can be resurrected in pure oxygen. Iron can be burned in pure oxygen. The combustion process of fire is likely to form a lot of unburned gas and dust, and it is likely to explode when it meets pure oxygen. Do you remember the salute used at the wedding? It is caused by oxygen and volatile gasoline. And oxygen is terrible because of pressure. After being heated, its expansion force changes dramatically, and the small air outlet is very willing to avoid this pressure. Even if there is no explosion, the combustion-supporting effect of oxygen will make it difficult to blow out the fire, and even people are flammable and explosive in pure oxygen. Acetylene explosion is even worse. It has the same principle as fuel air explosive. The explosion range of an acetylene bottle is equivalent to 4 1.7 tons of TNT.