Sefic carbon air tank inside damage

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Silent shot

Member
May 22, 2025
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Finland
I did buy new Sefic carbon 4.7L air tank from europe at big company and i also live in europe.
Tank did arrive today with standard valve fitted on tank.
Tank is CE standards.

I was very lucky that did remove that valve on tank before i did fill it air.

Bottom part inside of that tank was something black and it not come out for shaking that bottle upside down.

I did look inside tank with endoscope.
Look like there is holes through that aluminium cover!

There is also lots off very small black dots.

That tank should fill with 300 bar air.
I dont know would it explode or what will happen if i was try to fill it 300bar max pressure.

I did send email that company where it did come and i still waiting answer.

So there is good always check inside tank after buying even new one.

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Silent shot said:
I did buy new Sefic carbon 4.7L air tank from europe at big company and i also live in europe.
Tank did arrive today with standard valve fitted on tank.
Tank is CE standards.

I was very lucky that did remove that valve on tank before i did fill it air.

Bottom part inside of that tank was something black and it not come out for shaking that bottle upside down.

I did look inside tank with endoscope.
Look like there is holes through that aluminium cover!

There is also lots off very small black dots.

That tank should fill with 300 bar air.
I dont know would it explode or what will happen if i was try to fill it 300bar max pressure.

I did send email that company where it did come and i still waiting answer.

So there is good always check inside tank after buying even new one.

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I'm a little confused. That looks like carbon fiber inside. It should be an aluminum internal liner.
 
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6gun said:
Luxfer would've rejected that bottle over the liner pitting. That said, I've run them. They don't explode, they crack and leak down... The carbon and resin hold the pressure. Do as you see fit id try and get it returned. You paid for new
Click to expand...
Thanks for that info.
Nice to know that they don't explode.
I don`t take that tank.
 
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AlanMcD said:
I think that aluminum looks horrible - not just the holes but the general surface finish and appearance all around . . . .

Personally, I would return the tank for a refund, and then buy a different brand. I'd want nothing to do with a company that produces junk like that, so I certainly would not accept an exchange.
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Yes, it look bad inside at general.
I did wrote that e-mail that i don`t take that tank of new tank for same brand.

Need order new at different place and shipping takes 2 weeks...
First holiday was today and i would need that tank.
 
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Silent shot said:
Yes, it look bad inside at general.
I did wrote that e-mail that i don`t take that tank of new tank for same brand.

Need order new at different place and shipping takes 2 weeks...
First holiday was today and i would need that tank.
Click to expand...
You can find them used too, old firefighting or mine safety cylinders.
 
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Ratzy said:
I have inquired with SEFIC on Alibaba. They were, at best, cagey when I asked about cerifications and inspection.

I just went with Acecare. My alternate is Alsafe/Tuxing. Never found any issue with either of them and only a couple dollars more than SEFIC was.
Click to expand...
I did think Sefic are good because krale is selling those. Also fast 3 working day shipping was possible to get.
They were not very cheap 315€ with standart valve + charging kit 95€.
There was also Information that cylinder is M25x2 connection.
I did think that bigger connection is better.
However it was same M18x1.5 what is all else tanks.

My old tank is small Tuxing 2.5L carbon tank. I was little concern for purchase bigger tank if there is bigger risk for it blow up.

This topic did teath (They don't explode, they crack and leak down... The carbon and resin hold the pressure) like member 6gun did wrote.

So i did order Tuxing 6.8L carbon tank with double pressure gauge valve at amazon.de.
Price was with shipping about 280€.
Shipping take about 2 weeks.

There was only Tuxing tanks to offer, but i think those are better what Sefic.
 
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AlanMcD said:
I bought an Acecare 9L CE tank a few years ago and I am very happy with it. When new, I carefully inspected the interior of the tank and it was pristine - as one would expect on a brand new tank. I would not hesitate to recommend them, based on my experience (sample size of one, but 100% positive).
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Nice that you did get good and guality tank.
Tank interior inspektion is really good thing do and it can tell you sign of quality.
 
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Silent shot said:
I did think Sefic are good because krale is selling those. Also fast 3 working day shipping was possible to get.
They were not very cheap 315€ with standart valve + charging kit 95€.
There was also Information that cylinder is M25x2 connection.
I did think that bigger connection is better.
However it was same M18x1.5 what is all else tanks.

My old tank is small Tuxing 2.5L carbon tank. I was little concern for purchase bigger tank if there is bigger risk for it blow up.

This topic did teath (They don't explode, they crack and leak down... The carbon and resin hold the pressure) like member 6gun did wrote.

So i did order Tuxing 6.8L carbon tank with double pressure gauge valve at amazon.de.
Price was with shipping about 280€.
Shipping take about 2 weeks.

There was only Tuxing tanks to offer, but i think those are better what Sefic.
Click to expand...
I don't know anything about their quality. It all could have been translation issues when I was chatting with them.

The other one I've never felt comfortable with is Snow Rain.

Alibaba is generally the cheapest then AliExpress. Amazon is 3rd, Ebay 4th. Alibaba you can chat with the sellers, most of the time you must to get a quote. From a US perspective Acecare and Tuxing/Alsafe have US warehouse for larger tanks so shipping is less than a week.

Tuxing (same as Alsafe) is a good choice.
 
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Silent shot said:
I did think Sefic are good because krale is selling those. Also fast 3 working day shipping was possible to get.
They were not very cheap 315€ with standart valve + charging kit 95€.
There was also Information that cylinder is M25x2 connection.
I did think that bigger connection is better.
However it was same M18x1.5 what is all else tanks.

My old tank is small Tuxing 2.5L carbon tank. I was little concern for purchase bigger tank if there is bigger risk for it blow up.

This topic did teath (They don't explode, they crack and leak down... The carbon and resin hold the pressure) like member 6gun did wrote.

So i did order Tuxing 6.8L carbon tank with double pressure gauge valve at amazon.de.
Price was with shipping about 280€.
Shipping take about 2 weeks.

There was only Tuxing tanks to offer, but i think those are better what Sefic.
Click to expand...
I have 3 Alsafe/Tuxing tanks and they have been great for me. No issues with any of them. I was pleased with the quality of them and I think you'll be happy with the Tuxing. The insides of the tanks, granted I only inspected the inside of 2 of them thoroughly, looked perfect. I will probably be purchasing another, in a different size, in the near future
 
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Ratzy said:
I don't know anything about their quality. It all could have been translation issues when I was chatting with them.

The other one I've never felt comfortable with is Snow Rain.

Alibaba is generally the cheapest then AliExpress. Amazon is 3rd, Ebay 4th. Alibaba you can chat with the sellers, most of the time you must to get a quote. From a US perspective Acecare and Tuxing/Alsafe have US warehouse for larger tanks so shipping is less than a week.

Tuxing (same as Alsafe) is a good choice.
Click to expand...
Thanks for those information.
From europe perspective buying US or China is more expensive because tax, customs and shipping cost.
Also it take more time.

Nice that there is lot of options where to buy those tanks.

Didn't know that Tuxing and Alsafe are same.
I wish they are good choice.
 
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Matt7467 said:
I have 3 Alsafe/Tuxing tanks and they have been great for me. No issues with any of them. I was pleased with the quality of them and I think you'll be happy with the Tuxing. The insides of the tanks, granted I only inspected the inside of 2 of them thoroughly, looked perfect. I will probably be purchasing another, in a different size, in the near futuresound
Click to expand...

Matt7467 said:
I have 3 Alsafe/Tuxing tanks and they have been great for me. No issues with any of them. I was pleased with the quality of them and I think you'll be happy with the Tuxing. The insides of the tanks, granted I only inspected the inside of 2 of them thoroughly, looked perfect. I will probably be purchasing another, in a different size, in the near future
Click to expand...
Good to know that there is several good experience for those tanks.
 
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