I’ll be responding to the question – Do you know how beer is canned?
Do you know how beer is canned?
After the oxygen is purged the cans travel down a canning line for filling.
This explains why beer tastes different when it’s placed in a can and have a metallic or even plastic taste.
It does things such as affect the price of bottled beer and ones that’s on tap.
There’s more than just bottles and cans that beer come in though.
Another method can even be from a larger channel such as a keg.
How oxygen is purged from cans
It’s started with a pre-purging process of the can with CO2.
There’s a risk of consuming environmental oxygen when canning so that’s why when the oxygen’s purged it’s replaced with CO2.
The oxygen gets put into a package.
This process is called sparging.
The company Wild Goose for example uses a canning machine that’s designed to minimize dissolved oxygen pickup.
Purging with these substances reduces the chances of combustion or even oxidation in certain environments.

Here’s 3 ways that oxygen can be removed from the air:
- Cryogenic distillation
- Pressure swing adsorption (PSA)
- Vacuum swing adsorption (VSA)
Beer FAQs
Why does beer in a can taste different?
Beer’s different in a can because of chemical reactions that break down components such as metallic and plastics in the can.
The aluminum elements that make up the can changes up the taste and explains why most prefer it in a glass.
Why is draft beer so cheap?
Draft beer’s so cheap compared to bottled because they’re priced differently dependent on their pour costs.
I think of it as a cost for labor fee in where bottled or canned costs 5% more on average than drafted beer.
Ultimately this explains why draft beer usually costs less when bought at a bar.
What does “on tap” mean at a bar?
On Tap in reference to beer is serving the beverage directly from a keg.
It might be best to look at it as having the flavor of the day for choice of better words.

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