Safety Training Services instructors Dave & Martin conduct a demonstration of what happens when you introduce fire into a confined space atmosphere that is between the lower explosive limit (LEL) and upper explosive limit (UEL). STS Website: https://www.safetytrainingservices.net STS on Facebook: / safetytrainingservices STS on Twitter: / safetytrainings STS on Google+: https://plus.google.com/b/10971641350...