that wsa specifically wook talking bout nitrous. After that initial tank purchase theres nothing questionable. the only thing about nitrogen is understanding its 2000 psi and dont drop it, use a regulator etc…
Sounds like a throw away the whole wook situation
Do you still have trouble gettingn nitro gas???
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the dry ice guy is a pita though with asking what i need it for and telling me safety shit.
i trust him= thats the whole thing. He is a hot mess though.
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Idk tell him you’re do dry ice blasting with ice (sand blasting but with dry ice)
That shut people up pretty fast when they used to ask what i was doing
hes the only one who asks. hes liek 80 years old on a cigr in an empty warehouse with a cooler of dry ice. Hes bored. asks too many questions. the other places dont give a fuck and are in welding type joint but more expensive
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the excuses i use- fishing and freezing them= makes no sense in my area. and halloweed. but i see now that photography is a use for dry ice- but i already told the old man i tish and do haloween so i think hes sharp and knows i make co2 bombs out of 2 liter bottles= that seems to be his main fear.
Airgas and Praxair both want gigantic clients who are buying tens or hundreds of tanks at a time, and paying outrageous rental/recert fees on tanks, and not asking questions or price shopping.
I feel this way about banking too, y’all need to find people who don’t treat you like shit to do business with. My LWS (which is definitely not airgas or praxair assholes) knows me on a first name basis even though I’m not a huge client and doesn’t act like they hate me when I walk in there to spend some fuckin money.
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which company are you giving the positive review to? if they do you right put their name out.
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Any good local welding supply company you learn to know and love.
They’re never perfect, but you treat their employees right, they’ll do most anything for you
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Sorry, I know the poster who bumped the thread isn’t in Colorado but the LWS I’ve had wonderful luck with is Buckeye Welding Supply with locations in Commerce City and Greeley
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I misunderstood where the conversation was going, my bad
I get my DI from a dry ice blasting company near by who makes their own. He asks questions but it’s just small talk. My best friend is a commercial fisherman so we ship a lot of salmon…I have a commercial account at airgas and again they ask questions but just small talk… dude said “are you sure nitrogen is what you need, that sounds wrong” I just said “yeah I think so but I’m tired and I’m pretty sure that’s what my welder said to get, been working all day and sat in the deer stand before work, I’ll bring it back if it’s wrong.” That’s as far as the conversation went
I think it’s entirely possible to get whatever you need from most of these companies, it’s really not a huge concern to them what you’re doing with it and it’s pretty easy to say you either work for someone or someone works for you and you aren’t really sure exactly what they need it for…”hey man I just sweep floors and pick up parts” can probably answer most questions they have
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Compressed gas plants fill all grades of nitrogen from the same liquid source. Liquid nitrogen comes from air separation units and always has a minimum purity of 99.999%. The various grades of N2 are tested to meet the requirements of each grade.
USP / medical grade N2 is batch tested for toxic components and is certified to have no inhalation hazards in it. You need a prescription to buy medical grades of N2 and all other medical gases.
Food grade N2 is tested for inhalation hazards and oxygen content. It’s used to displace atmosphere in packaged food products; inflating packages holding potato chips, cheese, etc. It’s oxygen that rots food. Foods packaged with food grade nitrogen will last a long time.
UHP N2 is 99.999+% pure. Filled cylinders are batch tested to confirm that the purity of the contents did not degrade through the filling process.
Industrial nitrogen isn’t tested. Cylinders are refilled and sold. Cheap junk gas with no warranties.
I’d use UHP to push solvent. If I was running short on $, I’d use industrial.
Only medical grade, USP nitrous oxide can be inhaled and you need a prescription to get it. Racing grade nitrous has sulfur dioxide in it.
That makes it taste shitty and it can damage mouth, throat and lungs.
CO2 can be used to for beer, but most places use a blend of 25-30% CO2, balanced with nitrogen. The heavier a beer is (stout, craft beers) the more CO2 it will absorb. Too much CO2 in the beer causes it to foam too much. Using this blend reduces the amount of CO2 being exposed to the beer.
Cheers.
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I’d love to pick your brain on how this can apply to mixed breathing gases in diving, if you’re familiar. Standards in gas purity for technical diving is something I’ve always been curious about.
Food grade is fine for food products.
Medical grade and food grade are the same—aside from filling procedures and chain of custody, but that small difference doesn’t allow non-medical (i.e. if you’re not a hospital) purchase medical grade.
The guy at airgas once told me “it’s (food grade) almost exactly the same as medical grade”
I would optimistically say, yes,
Food grade is fine.
Ultra-high purity for those
Who can afford it or want to go the extra extra mile.
beer uses food grade so thats enough for me.
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Unless you have the ability to verify O2 content, it’s risky to blend gas that someone’s going to breathe. Scuba shops fill use oil-free air compressors to fill standard diving tanks to avoid any chances of killing their customers (and because it’s way cheaper than blending pure gases).
Heliox blends?
Message me.
Well, let me answer my own question. Guess I have learned quite a bit since I asked this question.
They cost the same, so get food grade if you can find it, but if you can’t, get regular. The amount your oil could possibly get contaminated with by your nitrogen (yeah what are the probabilities? 0.0…blah blah blah minor) while PUSHING?!? not very high. not very high.
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