Safety
Vacuum flasks are an implosion hazard, and especially glass vessels can shatter violently. Chips, scratches, or cracks can be a starting point for vessel dangerous failure, especially when the vessel temperature changes rapidly (due to adding hot or cold liquid). Glass vacuum flasks are usually contained in or coated with plastic or other materials to protect from physical damage, and to contain fragments should it break.
In addition, cryogenic storage dewars are usually pressurized, and can explode if pressure relief valves are not used.
Read more about this topic: Vacuum Flask
Famous quotes containing the word safety:
“For hours, in fall days, I watched the ducks cunningly tack and veer and hold the middle of the pond, far from the sportsman;... but what beside safety they got by sailing in the middle of Walden I do not know, unless they love its water for the same reason that I do.”
—Henry David Thoreau (1817–1862)
“Can we not teach children, even as we protect them from victimization, that for them to become victimizers constitutes the greatest peril of all, specifically the sacrifice—physical or psychological—of the well-being of other people? And that destroying the life or safety of other people, through teasing, bullying, hitting or otherwise, “putting them down,” is as destructive to themselves as to their victims.”
—Lewis P. Lipsitt (20th century)
“The safety of the republic being the supreme law, and Texas having offered us the key to the safety of our country from all foreign intrigues and diplomacy, I say accept the key ... and bolt the door at once.”
—Andrew Jackson (1767–1845)