Originally posted by cdma77
Dan,
I hope you are not mixing propellant in your basement ! That is a big no, no ! If you have some kind of fire you could burn down your home.
Jeff
Obviously the same can be said about any other part of the house.
So where *should* people mix propellant?
Of course it can be unsafe. It's rocket fuel. That means it needs to be done in a safe manner, not that it shouldn't be done.
If people spent as much effort telling each other how to do things safely as they spent warning them about the obvious dangers if they don't, the don't wouldn't happen. Except to people who have a garage in their basement, even if only in the figurative sense. Figure: this hobby was started because Stine knew people were going to try to build rockets, and he wanted them to have a safe way to do it.
Basement: You must have adequate ventilation. If your basement doesn't, make yourself a hood. If your fumes might be flammable, such as light hydrocabons, it needs to have an explosion proof motor. If your fumes might be heavier than air, you'll need an intake at floor level. Keep anything else flammable away from the area. A good work hood (suction or no) should be built along the lines of the BATF type 4 magazine. Check your homeowner's insurance to see if doing this voids it. Check with your fire marshal to see if this is illegal. Even if it isn't, do your fire department a favor just in case, and post warning signs appropriate to the kinds of chemicals used on the outside of the house nearest where you work/store them. You may be fully aware of the danger and are willing to do it, but it's not fair to the fire department to expect them to walk into a situation unwarned. The wrong fire fighting technique, and they could make things worse.
A very good hood for both chemical and painting use can be made from an old camping tent. Set it up (hung from the ceiling if necessary), and run some plastic air vent tubing (well sealed) from the tent window to the basement window. Install a fan in the window, connect the vent, and have at it. If the tent is old and leaky, a layer of plastic sheet, even the cheap stuff, will seal it well. the fan should be a squirrel cage with the motor outside the cage, run by a belt. Do not use a fan with the motor in the middle. You'll be pulling fumes right across the motor, and unless it's explosion proof there will be trouble. By the way, explosion proof only means it won't explode outside its case. It doesn't mean it won't explode inside its case. If you're setting this up in your basement, and you have a garage down there, you probably need to know the fan should be set to blow OUT.