Infiltration

Katla location: Sweden Gender: Male \|	What does "escape only" mean pertaining to breathing-filters? < on 7/28/2006 3:01 PM >

	I'm buying filters for my 3M 6000 gasmask, and found a filter that seems to fit my needs. However - the description says that the filter will clear out hydrogen sulfide, but after it says that it says in paranthesis "escape only" (effective against hydrogen sulfide (escape only)). What does this mean? The first thing that came to mind was that it ment that air coming OUT of the mask will not contain hydrogen sulfide (hooray, the filter combined with my lungs will effectively clear the gas out!). But that is completely illogical, so what does it mean? [last edit 7/28/2006 3:08 PM by Katla - edited 1 times] ..only some are more equal than others. Like ducktape.

'Dukes Noble Donor Gender: Male At least someone llikes me \| \|	Re: What does "escape only" mean pertaining to breathing-filters? <Reply # 1 on 7/28/2006 3:05 PM >

	It's just like those "fire escape hoods", the ones that are a plastic bag apparatus that you place on your head. Good for "escape" only meaning not intended for continued exposure, only for purpose of extracting oneself from a bad situation. I'm not sure why you would need protection against Hydrogen Sulfide, but if you worked in a plant that used this chemical and there was a leak, that cartridge would allow you enough time to safely leave the facility, but not to stay around for hours! I got your tour winner right here pussies, at least he'd crash out trying.

Katla location: Sweden Gender: Male \|	Re: What does "escape only" mean pertaining to breathing-filters? <Reply # 2 on 7/28/2006 3:10 PM >

	I don't work in an environment that would expose me to that, but I still need it to clear out hydrogen sulfide. I guess escape is good enough though Thanks! ..only some are more equal than others. Like ducktape.

wooble location: Surrey, UK Gender: Male \| \|	Re: What does "escape only" mean pertaining to breathing-filters? <Reply # 3 on 7/28/2006 3:57 PM >

	"Escape Only" means that it will only protect you for a short period of time, a matter of minutes, I.E what you might need if you were exposed to a hydrogen sulfide leak and had to evacuate the area. Depending on how the filter is made, hydrogen sulfide exposure might affect it's ability to filter other substances as well. I'd definitely not use an "escape only" filter to ENTER an environment containing the chemical.

Deuterium

location:
PNW
Gender: Male

Re: What does "escape only" mean pertaining to breathing-filters?
<Reply # 4 on 7/28/2006 5:51 PM >

Posted by wooble
"Escape Only" means that it will only protect you for a short period of time, a matter of minutes, I.E what you might need if you were exposed to a hydrogen sulfide leak and had to evacuate the area. Depending on how the filter is made, hydrogen sulfide exposure might affect it's ability to filter other substances as well. I'd definitely not use an "escape only" filter to ENTER an environment containing the chemical.

All the respirators I have seen are only "escape only" rated for H2S. You probably have to use self contained breathing apparatus (with air bottle) if you're going into places with high H2S concentration, like volcanic places.

blackhawk This member has been banned. See the banlist for more information. location: Mission Control UER newbie \| \|	Re: What does "escape only" mean pertaining to breathing-filters? <Reply # 5 on 7/29/2006 5:12 PM >

	Do you understand how deadly hydrogen sulfide is? Obviously not. Underestimating this gas can easily prove deadly. Instant unconsciousness, and rapid death from one breath of relatively low concentrations is a real possibility. If overcome by it you will probably die. Many hours after exposure and with little or no symptoms, delayed pulmonary edema can claim your life. * 0.0047 ppm is the recognition threshold, the concentration at which 50% of humans can detect the characteristic rotten egg odor of hydrogen sulfide [2] * 10-20 ppm is the borderline concentration for eye irritation. * 50-100 ppm leads to eye damage. * At 150-250 ppm the olfactory nerve is paralyzed after a few inhalations, and the sense of smell disappears, often together with awareness of danger, * 320-530 ppm leads to pulmonary edema with the possibility of death. * 530-1000 ppm causes strong stimulation of the central nervous system and rapid breathing, leading to loss of breathing; o 800 ppm is the lethal concentration for 50% of humans for 5 minutes exposition (LC50). * Concentrations over 1000 ppm cause immediate collapse with loss of breathing, even after inhalation of a single breath. If hydrogen sulfide present, leave. [last edit 7/29/2006 5:13 PM by blackhawk - edited 1 times] Just when I thought I was out... they pulled me back in.

Ruck location: Texas Gender: Male \|	Re: What does "escape only" mean pertaining to breathing-filters? <Reply # 6 on 7/29/2006 5:30 PM >

	In English it means "run." "For the listener, who listens in the snow, And, nothing himself, beholds Nothing that is not there and the nothing that is." ~Wallace Stevens

grassy

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Yeah, I'm MAX ACTION... So what?

Re: What does "escape only" mean pertaining to breathing-filters?
<Reply # 7 on 7/29/2006 5:43 PM >

Posted by Zero Horizon
"run."

"To Escape Only"
(Clarification for the noobs who don't eat asbestos, breath methane, and have not yet developed gills.)
[last edit 7/29/2006 5:44 PM by grassy - edited 1 times]

i have never taken a photograph in my life
exploring should be done at home, where it's safe

Ruck

location:
Texas
Gender: Male

Re: What does "escape only" mean pertaining to breathing-filters?
<Reply # 8 on 7/29/2006 8:45 PM >

Posted by grassy

"To Escape Only"
(Clarification for the noobs who don't eat asbestos, breath methane, and have not yet developed gills.)

I should have been clearer. Run. Towards the exit.

[last edit 7/29/2006 8:49 PM by Ruck - edited 1 times]

"For the listener, who listens in the snow, And, nothing himself, beholds Nothing that is not there and the nothing that is." ~Wallace Stevens

Katla

location:
Sweden
Gender: Male

Re: What does "escape only" mean pertaining to breathing-filters?
<Reply # 9 on 10/16/2006 12:18 AM >

Posted by blackhawk
Do you understand how deadly hydrogen sulfide is? Obviously not. Underestimating this gas can easily prove deadly. Instant unconsciousness, and rapid death from one breath of relatively low concentrations is a real possibility. If overcome by it you will probably die. Many hours after exposure and with little or no symptoms, delayed pulmonary edema can claim your life.

* 0.0047 ppm is the recognition threshold, the concentration at which 50% of humans can detect the characteristic rotten egg odor of hydrogen sulfide [2]
* 10-20 ppm is the borderline concentration for eye irritation.
* 50-100 ppm leads to eye damage.
* At 150-250 ppm the olfactory nerve is paralyzed after a few inhalations, and the sense of smell disappears, often together with awareness of danger,
* 320-530 ppm leads to pulmonary edema with the possibility of death.
* 530-1000 ppm causes strong stimulation of the central nervous system and rapid breathing, leading to loss of breathing;
o 800 ppm is the lethal concentration for 50% of humans for 5 minutes exposition (LC50).
* Concentrations over 1000 ppm cause immediate collapse with loss of breathing, even after inhalation of a single breath.

If hydrogen sulfide present, leave.

If I'm wearing a mask that can manage the hydrogen sulfide for a limited amount of time - will I not be able to smell the gas while the mask is working? If that is the case, wearing a mask that protects against Hydrogen Sulfide could actually put me in an even more dangerous situation than not wearing one, right?

Which would lead to - if I'm gonna wear a mask that protects against hydrogen sulfide for a short period of time, I'm gonna need a detector to tell me when to run.

How common is Hydrogen Sulfide? I was wanting a mask that protected against it b/c I've read in several places that it's a gas that might be present in drains and the likes, and the plan was basically to be able to survive long enough to get out if I smelled rotten eggs. But if the mask takes away the smell, that defeats the purpose.

..only some are more equal than others. Like ducktape.

blackhawk

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location:
Mission Control

UER newbie

Re: What does "escape only" mean pertaining to breathing-filters?
<Reply # 10 on 10/16/2006 12:45 AM >

Posted by Katla

If I'm wearing a mask that can manage the hydrogen sulfide for a limited amount of time - will I not be able to smell the gas while the mask is working? If that is the case, wearing a mask that protects against Hydrogen Sulfide could actually put me in an even more dangerous situation than not wearing one, right?

Which would lead to - if I'm gonna wear a mask that protects against hydrogen sulfide for a short period of time, I'm gonna need a detector to tell me when to run.

How common is Hydrogen Sulfide? I was wanting a mask that protected against it b/c I've read in several places that it's a gas that might be present in drains and the likes, and the plan was basically to be able to survive long enough to get out if I smelled rotten eggs. But if the mask takes away the smell, that defeats the purpose.

If you believe it's present, leave immediately, filter or not. When Merck's index describes a something as an "insidious poison" they're not kidding around.
Very small amounts won't kill you, but in an enclosed space it's hard to say how much is present. If your eyes and throat start burning from it, your in trouble. 50-100 ppm leads to eye damage. That's not much. The exposure is accumulative; the longer you breath it, and the more you exsert yourself, the greater the damage. It may take a half a day or so for fatal damage caused by it to become apparent.

Just when I thought I was out... they pulled me back in.

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