OSHA Safety Manuals | flammable
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That Container Only Looks Empty! Containers that have held flammable or combustible liquids can remain explosive even after the liquid has been removed. The liquid in the container is replaced by air which mixes with the hazardous vapors. This combination can be explosively ignited by a spark or heat. In fact, these containers are normally more explosive than a full container. How many times have you seen a 5 gallon pail or a 55 gallon drum being used as a welding or grinding stand? This is very dangerous. Any sparks produced could ignite the vapors. Also, the torch flame, heating the container,...

Boiler Safety Workers that use, maintain, and service boilers know that they can be potentially dangerous. Boilers are gas-fired or electric closed vessels that heat water or other liquid to generate steam. The steam is superheated under pressure and used for power, heating or other industrial purposes. Though boilers are usually equipped with a pressure relief valve, if the boiler fails to contain the expansion pressure, the steam energy is released instantly. This combination of exploding metal and superheated steam can be extremely dangerous. Only trained and authorized workers should operate a boiler. Workers should be familiar with the boiler manufacturers operating...