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Thread: Beans on a plane....

  1. #1
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    Beans on a plane....

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Hi everyone, asking a question that may have been asked before* ::)* but, am heading west with Qantas on Monday and have 4 250g bags of 1 week roasted beans with valves and heat sealed to take with me (along with an Aeropress and Sunbeam EM0480 thanks to fellow snobber mtee).* Due to pressure, is it preferable I take these as carry on luggage or will they be ok in my suitcase?

    Thanks!

  2. #2
    Super Moderator Javaphile's Avatar
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    Re: Beans on a plane....

    Most planes pressurize their holds to the same pressure as is in the cabin. With that said the only way you can know for sure would be to call the airline and inquire about what the case is on your specific flight.


    Java "Go west young man go west!" phile

  3. #3
    Sleep is overrated Thundergod's Avatar
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    Re: Beans on a plane....

    Id play safe and take them as hand luggage.
    Out of your sight you have no guarantee of their treatment.

    Id also put tape over the valve.
    I believe the cabin pressure is a little less than sea level so the beans will degas faster if you dont.

  4. #4
    Senior Member fivegallon's Avatar
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    Re: Beans on a plane....

    My last flights from Perth to KL, then KL to Bintulu i had unopened, sealed bags of beans that i just threw in my check-in baggage (along with Grindripper).
    All beans arrived without any blowouts. Grindripper is now onto second pack of filters* ;)

    Edit: beans were purchased here on Beanbay. Standard Beanbay packaging. No tape over one-way valves.

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    Re: Beans on a plane....

    Quote Originally Posted by 0A362B303A3B2C39313A5E0 link=1298681093/2#2 date=1298709879
    I believe the cabin pressure is a little less than sea level so the beans will degas faster if you dont.
    Cabin pressure is around 3/4 that of sea level (around 75kPa instead of around 100kPa). I doubt tape on the outside would hold 25kPa of pressure. Tape on the inside might, as it would be pushing outwards on the valve, but I think that ship has sailed.

    I believe this is a moot point, as roasted coffee is shipped around the country in planes every day in the undercarriage of planes as air freight.

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    Re: Beans on a plane....

    Excellent, thanks for your replies.* Maybe I can experiment, 2 in carry on and 2 in suitcase and see the difference, if any! Its only a 4 hour flight...thank goodness* ;)

    Cheers!

    ps whatever state they arrive in, itll still be better than freeze dried Moccona* :D

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    Mal Dimal's Avatar
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    Re: Beans on a plane....

    Quote Originally Posted by 5F40425841544342552D0 link=1298681093/4#4 date=1298712283
    I believe this is a moot point, as roasted coffee is shipped around the country in planes every day in the undercarriage of planes as air freight.
    Not only moot but misses the intent of 1-Way Valves in the first place - Its good that the valves allow gas to vent from inside the bag to outside but stop contaminating gasses heading back the other way.

    That is their purpose after all :-?....

    Mal.

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    Re: Beans on a plane....

    Quote Originally Posted by 45686C606D010 link=1298681093/6#6 date=1298721304
    Not only moot but misses the intent of 1-Way Valves in the first place
    While I disagree with the whole premise of bothering with taping the bag up (evident by my comment saying that bags ship around the country every day)...

    I just want to say that while it misses the intent, if the bag completely exhausted all its gases in the low pressure, then went to an area of higher pressure, then the bag would implode!

    In seriousness though, if the bag released all its gases, then suffered an increase of 25kPa pressure on the outside of the bag, could the one way valve handle 25kPa inwards? It probably can, but havent been able to find hard data to say just how much reverse pressure they can take.

  9. #9
    Mal Dimal's Avatar
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    Re: Beans on a plane....

    I dont think 25Kpa would be a big deal either Richard and I dare say they could take much more than this.

    Have to say though, Ive never had an imploded bag-o-beans in all the years Ive been buying them ;D.... Plenty of them have flown too ;)

    Mal.

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    Re: Beans on a plane....

    Quote Originally Posted by 4A67636F620E0 link=1298681093/8#8 date=1298723731
    Ive never had an imploded bag-o-beans in all the years Ive been buying them
    Im trying to visualise what an imploded bag would look like. Maybe it would take down the plane, then no beans at all for you!

    Quote Originally Posted by 5875717D701C0 link=1298681093/8#8 date=1298723731
    I dont think 25Kpa would be a big deal either Richard and I dare say they could take much more than this.
    A vacuum cleaner is just over -20kPA normally, so one day when i get bored, I might see if I can break a one way valve with reverse suction.

    Just for clarity, clearly, air freighting beans has no ill effects.

  11. #11
    Mal Dimal's Avatar
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    Re: Beans on a plane....

    Good grief, the things we discuss around here, eh.... ;D

    Anyone would think that there are the odd pedant or two hiding in the ranks ;) ::)

    Mal.

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    Re: Beans on a plane....

    Quote Originally Posted by 517C787479150 link=1298681093/10#10 date=1298727297
    Anyone would think that there are the odd pedant or two hiding in the ranks
    Where? Cast them out!
    Oh crap, its me

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    Re: Beans on a plane....

    Whenever travelling for competition with coffee I only tape the valves over last minute.

    It doesnt matter whether its in the cabin or hold. Same thing.

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    Senior Member trentski's Avatar
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    Re: Beans on a plane....

    Quote Originally Posted by 4F50524851445352453D0 link=1298681093/7#7 date=1298721907
    I just want to say that while it misses the intent, if the bag completely exhausted all its gases in the low pressure, then went to an area of higher pressure, then the bag would implode!
    Where would it implode to? pretty sure it would just look like a vacuum packed bag of beans 8-)

    Then you could watch it swell up as the beans continued to degas

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    Senior Member fivegallon's Avatar
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    Re: Beans on a plane....

    Quote Originally Posted by 787E6962787F67650C0 link=1298681093/13#13 date=1299149618
    Quote Originally Posted by 4F50524851445352453D0 link=1298681093/7#7 date=1298721907
    I just want to say that while it misses the intent, if the bag completely exhausted all its gases in the low pressure, then went to an area of higher pressure, then the bag would implode!
    Where would it implode to? pretty sure it would just look like a vacuum packed bag of beans 8-)

    Then you could watch it swell up as the beans continued to degas
    Well my flights in the last 24hrs have proved somewhat different to my earlier posting.
    After 5.5hrs Perth to KL the 1kg unopened Espresso WoW was looking like RichardMs suggestion above, a vacuum packed bag of beans ( a solid mass at that!).
    Getting ready for my next flight 9hrs later and it was still a solid mass after the night in the hotel.
    Another flight (2.5hrs) and a check on the beans after that flight and they were back to normal and the suitcase was sporting a sweet aroma.
    Strange...

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    Re: Beans on a plane....

    I was asked this question recently about frieghting beans in the hold, whether you would need to use a vacume sealed bag, and having read this thread it seems you dont, and it looks like the plane will do it for you anyway. Can anyone confirm this? I suppose, as suggested earlier, the airline or freight company would know this, just wondering if any here could clarify? Cheers

  17. #17
    Sleep is overrated Thundergod's Avatar
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    Re: Beans on a plane....

    Tape the valve.

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    Re: Beans on a plane....

    Just from my own perspective.... ;)

    I wouldnt worry about anything with 1-Way Valve Bags. As the pressure differential increases with altitude, the valve will allow gas from inside the bag to vent to atmosphere. When the plane returns to earth, the valve will close and prevent air entering the bag and as you surmise, it will probably take on the appearance of an evacuated coffee brick pack for a while. This will probably diminish with time though as the beans continue to degas a little....

    Mal.

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    Re: Beans on a plane....

    Quote Originally Posted by 5D70747875190 link=1298681093/17#17 date=1312787517
    Just from my own perspective.... ;)

    I wouldnt worry about anything with 1-Way Valve Bags. As the pressure differential increases with altitude, the valve will allow gas from inside the bag to vent to atmosphere. When the plane returns to earth, the valve will close and prevent air entering the bag and as you surmise, it will probably take on the appearance of an evacuated coffee brick pack for a while. This will probably diminish with time though as the beans continue to degas a little....

    Mal.
    Hi Mal,

    I still tape them and carry them onboard rather than let them go in the hold.

    Most 1-way valves I have experienced allow degas air to be removed in the cabin then re-breathe (albeit slowly) at atmospheric pressure and ultimately equalise. I really think theyre only 1-way at 1 atmosphere.

    Chris

  20. #20
    Mal Dimal's Avatar
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    Re: Beans on a plane....

    Behmor Brazen - $249 - Free Freight
    Quote Originally Posted by 4F7A77704458747D7D7E7E1B0 link=1298681093/18#18 date=1312788037
    I still tape them and carry them onboard rather than let them go in the hold.

    Most 1-way valves I have experienced allow degas air to be removed in the cabin but re-breathe (albeit slowly) at atmospheric pressure and ultimately equalise. I really think theyre only 1-way at 1 atmosphere.
    A few years ago, I used a fairly simple rig to seal around the valve using a bike pump and no matter how I tried, I couldnt get the valve to fail so I think theyre good for more than 1.0Bar - At least, the bags I bought from Coffee Parts were anyway.... 8-)

    Tried this before I sent off some beans air-express to a mate... ;)

    Mal.



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