Safety of vacuum ovens - Cannabis Concentrates - International Cannagraphic Magazine Forums

Fatturtle · 11-15-2017, 01:32 AM

Just starting making bho with a closed loop system.
I am practicing on a small system with 1.5 inch spools to learn on.

I am very careful safety wise and wondering about
the safety of having a small 0.9 cf oven full of butane vapor. There is led's light strips inside the oven with electrical wires going to them and wondering if that could trigger an explosion.

I am using nitrogen right now when I put fresh slabs
in the oven to replace the oxygen with nitrogen to make it safer for the first few hours until most of the
butane is gone but I know most people don't bother
doing that.

I have read a lot of threads about safety and stories
of when things go wrong but have never read about
a vacuum oven explosion.

Maybe the concentration of butane is too great inside the oven most of the time.

Curious if anyone has heard of an incident where a vacuum oven was the culprit?

Rickys bong · 11-15-2017, 03:33 AM

In order to have butane ignite the gas concentration has to be within certain limits. If the butane to air mixture is outside of these limits, nothing can happen.

The amount coming off a slab is unlikely to reach the lower explosive limit, especially when most of the oxygen has been drawn out of the oven to start with.

Don't worry about it.

Gray Wolf · 11-15-2017, 11:00 AM

What RB said. Propane has a lower explosive limit of 2.01% and Butane 1.86% when the oxygen content of the atmosphere around it is 21% oxygen.

pnw bb · 11-21-2017, 11:42 PM

those leds your talking about are located outside of the actual chamber.there is a heavy glass door the lights and then a thin plastic layer. look at your door from the side or above.

11-15-2017, 01:32 AM	#1
Fatturtle Newbie Join Date: Nov 2017 Posts: 15	Safety of vacuum ovens Just starting making bho with a closed loop system. I am practicing on a small system with 1.5 inch spools to learn on. I am very careful safety wise and wondering about the safety of having a small 0.9 cf oven full of butane vapor. There is led's light strips inside the oven with electrical wires going to them and wondering if that could trigger an explosion. I am using nitrogen right now when I put fresh slabs in the oven to replace the oxygen with nitrogen to make it safer for the first few hours until most of the butane is gone but I know most people don't bother doing that. I have read a lot of threads about safety and stories of when things go wrong but have never read about a vacuum oven explosion. Maybe the concentration of butane is too great inside the oven most of the time. Curious if anyone has heard of an incident where a vacuum oven was the culprit?
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11-15-2017, 03:33 AM	#2
Rickys bong Member Join Date: Aug 2009 Location: Vancouver BC Posts: 451	In order to have butane ignite the gas concentration has to be within certain limits. If the butane to air mixture is outside of these limits, nothing can happen. The amount coming off a slab is unlikely to reach the lower explosive limit, especially when most of the oxygen has been drawn out of the oven to start with. Don't worry about it. __________________ "It's not fucking rocket appliances... "
	Quote 1 members found this post helpful.

11-15-2017, 11:00 AM	#3
Gray Wolf A Posse ad Esse. From Possibility to realization. Join Date: Apr 2009 Location: River City, USA Posts: 9,402	What RB said. Propane has a lower explosive limit of 2.01% and Butane 1.86% when the oxygen content of the atmosphere around it is 21% oxygen. __________________ An age is called Dark not because the light fails to shine, but because people refuse to see it. Believing is seeing and ignorance is bliss until it bites you in the ass! Fervor is the weapon of the impotent. The harder the sell, the poorer the product. Alas, my ignorance abounds; the more I've learned, the less I know that I know.......... Thou shalt seek and respect the opinions of operators, even unto the third helper, for theirs is a wisdom unknown to technicrats. Wise men learn more from fools, than fools from wise men. In my dotage I finally discovered that the secret to putting on pants both legs at a time is sitting down.
	Quote 1 members found this post helpful.

11-21-2017, 11:42 PM	#4
pnw bb Member Join Date: Apr 2014 Posts: 80	those leds your talking about are located outside of the actual chamber.there is a heavy glass door the lights and then a thin plastic layer. look at your door from the side or above.
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