Not all “simple asphyxiants” are created equal; thus, not all make for good purging or blanketing. Would you believe me if I told you that one very common simple asphyxiant gas should NEVER be used for purging or blanketing flammable atmospheres?
Many folks view Nitrogen (N2) and Carbon Dioxide (CO2) as very similar. This is based on how we, as humans, respond to both of these gases. CO2 has been getting a lot of attention lately due to its increasing use in the food and beverage retail industry and industrial refrigeration. It has some great qualities for its intended uses, but it comes with a significantly increased risk to workers who normally do not work around hazardous chemicals.