Threshold Limit Value- For a normal 8-hour workday, to which nearly all workers can be exposed day after day without adverse effects
Time Weighted Average. (C1t1+C2t2+Cn*tn)/(8 hrs)
Immediately Dangerous to Life or Health
No Observed Adverse Effect Level
Short Term Exposure Limit- max concentration to which workers can be exposed for 15 min without suffering
Threshold Limit Value- Ceiling Limit. Should not be exceeded, even instantaneously
Permissible Exposure Level
Vapor Cloud Explosion
Boiling Liquid Expanding Vapor Explosion
Spontaneously combust in the presence of air
Extremely Rapid and Violent Decomposition, produces a shock wave. (class A explosives- 5 PSI is lethal)
Very rapid, often violent decomposition. Rapid burning (class B explosives, no shockwave if unconfined)
Lowest Temperature needed to vaporize enough fuel to form a flammable mixture in air.
Fuel, Oxidizer, Ignition Source
Pressure above Atmospheric Pressure
Any liquid or solid with oxygen in its structure (fuel and oxidizer)
Maximum Allowable Working Pressure
Mean Time Between Failures
Please allow access to your computer’s microphone to use Voice Recording.
We can’t access your microphone!
Click the icon above to update your browser permissions above and try again
Reload the page to try again!
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Your microphone is muted
For help fixing this issue, see this FAQ.