Mine go in the trunk of my car, valve forward. Blocked with soft weights.
Transporting cylinders
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Why valve forward?
So if something happens and they burst, the tank goes into the car behind you, instead of at you. That's what the guys at the shop told me, anyway, when I bought my tanks.
There are a couple of ways of considering it. I think I can decelerate through panic stopping or hitting something faster than I can accelerate and if the tanks move violently forwards, I do not want the valve to be what stops their forward movement. The chance of them sliding backwards is harder to imagine. I suppose in a violent rear end collision.
If a burst disc goes I want it as far from me as possible.
If somehow a valve broke out of the neck, I will take the tank up against the back of my seat rather than the blast of air and the valve as a projectile embedded into my back.
If a burst disc goes I want it as far from me as possible.
If somehow a valve broke out of the neck, I will take the tank up against the back of my seat rather than the blast of air and the valve as a projectile embedded into my back.
claymore
Contributor
I lay a racheting tie down strap across the folded down 2nd row seat back lay the tanks down across the with foam tank holders between them and then lay foam matting on the 1st layer put on another layer of tanks up to 3 layers of tanks and then connect the 2 ends of the tie down strap over the tanks and ratchet it tight, it makes one big bunch of tanks so they stay where you put them. The rest of my gear is behind the tanks so there is lots of room and cushioning if I get rear ended. This also moves the weight of the tanks to the center of the vehicle so it handles better, it can be up to 10 tanks, mostly steels.
The greatest danger of a valve failure in a collision is a side impact on the valve, snapping it off at the threads or the middle if the valve. A direct impact on the top of the valve is going to try to crush the valve and or drive it into the tank.
The greatest danger of a valve failure in a collision is a side impact on the valve, snapping it off at the threads or the middle if the valve. A direct impact on the top of the valve is going to try to crush the valve and or drive it into the tank.
TrimixToo
Contributor
The thrust created by a broken valve is not infinite. I calculated the approximate initial thrust from tank pressure and tank weight using a sample dip tube with a measured internal diameter for a number of different tanks. The "winner" was an HP Faber 80, which (ignoring flow effects through the dip tube) would have a maximum thrust of about 350 lbs. If the tank is unrestrained, that's a bit over 10G. But 350 lbs. should not make a tank go through a seat back or a trunk bulkhead on its own. (Your basic AL80 would develop 7-8G.)
If the valve breaks, your sense of hearing is in grave danger of severe permanent damage. They are more likely to break, in my opinion, if the valves are forward than if they are pointed backward. (Go visit a junkyard. More cars die from front end collisions than rear end collisions.)
I've seen a number of different recommendations. Most agencies seem to agree that valve forward is bad, but some prefer horizontal to vertical. I favor "secured" over "not" every time and as rule transport tanks both vertically or horizontally with valves to the rear.
If the valve breaks, your sense of hearing is in grave danger of severe permanent damage. They are more likely to break, in my opinion, if the valves are forward than if they are pointed backward. (Go visit a junkyard. More cars die from front end collisions than rear end collisions.)
I've seen a number of different recommendations. Most agencies seem to agree that valve forward is bad, but some prefer horizontal to vertical. I favor "secured" over "not" every time and as rule transport tanks both vertically or horizontally with valves to the rear.
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