Carbon steel S275

[JohnWeal]

Good morning,

We are specifying a fuel oil tank which is approx 7m long, 3m wide and 3m high.

The tank will be located where the temperature is from minus 20 to plus 40 deg C.

Due to the temperature, the actual grade of carbon steel i don’t think should be S275JR but instead S275J0.

I would appreciate any help.

Best regards
John

 

[kingnero]

For the thickness I guess that will be used for a fuel tank, it's not necessary to use JO quality.
If empty, what are the loads on it? I guess that size, it'll be a stationary tank? So => low forces.
When filled, temp won't drop too much below 32 F (?), so then you won't benefit from the additional low temp properties of J0 steel.
However, price difference is minimal and availibility won't be a problem, so why not.

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[XL83NL]

What is your design code?
You're using a structural steel to design a tank. I would normally expect the material to P.... rather than S..., as P is pressure vessel material.

As to your question; J0 is tested at 0 °C. Your design is -20 °C. hence I woudl expect at least J2 grade, which is tested at -20 °C.

 

[kingnero]

Eurocodes have clear tables indicating what impact grade to use.
No need whatsoever to drop to J2 for this application.
Open-to-air tanks don't have to be P-material (not that it's a bad idea).

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