I'll go along with that line of reasoning .... but, when I purchase a "new" cylinder that has been sitting on the shelf for 6 years, do I get a 60% discount? Probably not.pilkguns wrote:I have already pointed out the costs to mitigate the danger in a common SCUBA tank are comparable to buying a new air gun cylinder every 10 years.
Adding in the extra costs because of the complexity of an airgun cylinder makes mitigating the danger in the same manner of a SCUBA exremely expensive.
Buying a new cylinder every ten years is a safe, sensible and cost effective method to elminate as much danger as reasobably possible from our sport.
I think you probably need to think about what we are worried about ... the cylinder metal rupturing? If that's the case, hydro-ing a cylinder's tube structure should not be any more than I pay for my most expensive SCUBA tank ... about $80 every 5 years. $160-$200 every 10 years is not unreasonable I think, and fully in line with your argument above.
But if a user buys a "new" tank for $200 and only gets 4 years out of it, then the cost argument starts becoming iffy.
What other pressure controlling items do we also need to worry about? Regulator housings and the threads of a receiver?
I agree we need to make this as safe as possible, but with any airgun/firearm there are failure paths ... it comes down to how likely is there to be a failure.
Scott, you know much more about this than I do, but again, not counting manufacturing defects and abuse, how many cylinders do you know of that have just failed due to fatigue? I think the margin of safety in these cylinders is quite high ... maybe 2-3X or more? I'd be stunned if the cylinders even remotely approach fatigue limits in normal use.
(Put 4Kpsi in a cylinder and yes, it becomes dangerous from then and thereafter)
I think there should be a way to remove the manometer & valve ends, and test them. Then install test ends on the cylinder and hydro it.
Laser mark, replace valve & manometer and done.
OK, this may cost $200-$300, but for rifles/pistols with no replacements, this should be an option.