Fuel for tender

[Seastoke]

Just fitted this holds alitre

 

[Scubadoo]

Seems a neat idea. Out of interest, what's your view on the Seago lite 230, thinking of getting one.

 

[Seastoke]

Very good , it’s about as heavy as my sup , we used it for 3 years in the welch med and did well.

 

[James jameson]

Looks like a small bomb in the making with no vent or expansion capability, be careful

 

[Seastoke]

Does your can have a vent

 

[roa312]

Looks like a small bomb in the making with no vent or expansion capability, be careful

You are maybe referring to the overpressure risk from being left out in the sun in high temperatures? I think that is a real risk on the fake jerry cans but this container appears to be much more rigid/strong with no seams etc. So personally I don't think there should be any significant risk (happy to be corrected though!). But if left in the sun on very hot days you might experience the pressure buildup when opening the cap!

 

[James jameson]

You are maybe referring to the overpressure risk from being left out in the sun in high temperatures? I think that is a real risk on the fake jerry cans but this container appears to be much more rigid/strong with no seams etc. So personally I don't think there should be any significant risk (happy to be corrected though!). But if left in the sun on very hot days you might experience the pressure buildup when opening the cap!

Those are all plastic which may have some ’give’ in the plastic, these sealed and strong bottles have no flex.
try putting coke in it, have a little shake then open it.

 

[Seastoke]

They are a great can , not eBay shit it is on the tender not n the back of the boat , what has coke got to do with petrol. Ok where do you keep your petrol for your tender.

 

[James jameson]

They are a great can , not eBay shit it is on the tender not n the back of the boat , what has coke got to do with petrol. Ok where do you keep your petrol for your tender.

Coke demonstrates how these drinks bottles deal with pressure.
I keep it in a petrol can with a vent and if left in the sun the pressure builds and is correctly contained.
Best of luck to anyone trying this with a very flammable liquid.
Be interested to hear the RNLI or a fire officers take on the idea

 

[roa312]

Coke demonstrates how these drinks bottles deal with pressure.
I keep it in a petrol can with a vent and if left in the sun the pressure builds and is correctly contained.
Best of luck to anyone trying this with a very flammable liquid.
Be interested to hear the RNLI or a fire officers take on the idea

I'm no expert or engineer (or fire officer!) but a quick Google search on the thermal expansion of gasoline led to the following site where they present a calculation of the increase in liquid volume of 60 liters of fuel experiencing a 20°C increase in temperature (example 2). They show that this leads to a 1.10 liter increase in volume or c.1.8%. Assuming a linear relationship, at a 60°C increase in temperature that would be a 5.5% increase in volume. I checked the specification of the Primus 1.0L bottle, which indicates an internal cylinder volume of 1.1-1.3L (my calculations) indicating a 10-30% excess volume compared to the storage recommendation, leaving plenty of room for the thermal expansion.

The internal vapor pressure is proportional to the increase in absolute temperature. So an increase in temperature from 20°C to 80°C (293K to 353K) corresponds to a 20% increase in pressure. Hardly enough to burst an aluminum cylinder. But again, I'm no expert on this and I guess there should be manufacturer specs on storage?

 

[James jameson]

I'm no expert or engineer (or fire officer!) but a quick Google search on the thermal expansion of gasoline led to the following site where they present a calculation of the increase in liquid volume of 60 liters of fuel experiencing a 20°C increase in temperature (example 2). They show that this leads to a 1.10 liter increase in volume or c.1.8%. Assuming a linear relationship, at a 60°C increase in temperature that would be a 7.2% increase in volume. I checked the specification of the Primus 1.0L bottle, which indicates an internal cylinder volume of 1.1-1.3L (my calculations) indicating a 10-30% excess volume compared to the storage recommendation, leaving plenty of room for the thermal expansion.

The internal vapor pressure is proportional to the increase in absolute temperature. So an increase in temperature from 20°C to 80°C (293K to 353K) corresponds to a 20% increase in pressure. Hardly enough to burst an aluminum cylinder. But again, I'm no expert on this and I guess there should be manufacturer specs on storage?

Best of luck !

 

[Seastoke]

Coke demonstrates how these drinks bottles deal with pressure.
I keep it in a petrol can with a vent and if left in the sun the pressure builds and is correctly contained.
Best of luck to anyone trying this with a very flammable liquid.
Be interested to hear the RNLI or a fire officers take on the idea

James the can is a high quality fuel storage can , what do you see what I don’t .

 

[petem]

Best of luck !

James, it's designed to hold fuel. It's not a water bottle.

https://amzn.to/3WOMpxy