Are there rooms in your place of business where oxygen is in use? If you remember from grade school chemistry, oxygen feeds fire and makes fire burn much more quickly. In these environments especially, any open flames can become particularly hazardous—if only there was a sign that communicates such…
You’re looking at it! Use no smoking oxygen in use signs to remind visitors, employees, and customers to not light up in the presence of oxygen and flammable gases. Post these signs in factories, manufacturing plants, treatment centers, and any other place where oxygen may be in use.
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= exterior & interior use 
= interior use only 
