Anybody knows about fire prevention (layout/design) using nitrogen in train stations? any info would help.?

i need to present a fire prevention design/layout using nitrogen in train stations. any information (websites i can check) woul be of great help.

Anybody knows about fire prevention (layout/design) using nitrogen in train stations? any info would help.?
Train Stations?, like with passenger in them? While it is true enough that nitrogen is not toxic at normal pressures, if you use enough that reduce the oxygen content to the point fire stops, it does get hard to breathe. There may be a point where fire is slowed, and healthy people can also survive. The site liked to below does make some statements (on other pages) about not bing harmful to people, but that would only be in carefully controlled conditions. You don't know who is going to be in a station or how much their breathing has already been compromised by smoke before you release the nitrogen. If I were designing a train station I'd use conventional water sprinklers. I really wouldn't want to be responsible for suffocating all the occupants.





This link is about fire protection in locomotives, but those are restricted areas where there are very few people (possibly just one engineer) to evacuate or supply with breathing equipment. http://www.wagner.de/english/index.php?J...
Reply:I also cringe at the thought of using nitrogen as a suppression agent in a train station, unless it would be in unoccupied areas. There are no valuables in a train station that would require extra protection that I can think of, so I am wondering why you do not just use sprinklers or a water mist system, unless you are worried about possible rusting / corrosion of your engines and train components. However, any Brittish / European inventions are good to research, as they are usually at the forefront in the building research and development industry. Check the following links, they provide information on the best water-alternative suppression agents out there today.
Reply:I don't have any silver bullet for you at the moment, other than to say that I can see the merit in not shooting water onto a high-voltage rail that's on fire. I'm unclear if you're talking a N2-based foam system or a sealed N2 gas repression, though a foam makes a heck of a lot more sense.





http://www.enfp.umd.edu/ is the University of Maryland's Dept of Fire Protection Engineering. Last I checked it was the only one of it's kind in the country. It's not super-fast, but you can make contacts there and get in touch with a few people over there, I know there was some serious work going on in train station protection a few years ago, I'd expect the theses to be completed by now, but UMD doesn't publish them to the web.





http://firechief.com/mag/firefighting_mi... is an article about mining firefighting. There's a fair bit in there on the methods they're using in gaseous and foam-based prevention, but nothing incredibly technical. If you're looking to put together an honest-to-God design proposal, this is gonna be sorely lacking.





I'd suggest you contact U of Md if you have the time and see if they can't point you in the right direction.
Reply:If you are forced to use nitrogen in the extinguishing agent, you will need to use one of the proprietary compounds, like Inergen. You can find it on the Internet.





Nitrogen itself will put out fires, but can kill people in high concentrations.
Reply:The fire protection using nitrogen may be designed in similar fashion as suggested by NFPA -15 / NFPA (FM-2000) or F ire protection with inert gas application standard of BS. These standards are not available in websites.