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Post by Aquala1 on Jan 31, 2018 5:27:12 GMT -8
Walden, I might be interested in the ‘50s tanks. I’d hate to see them go to scrap.
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Post by crabbyjim on Jan 31, 2018 6:28:22 GMT -8
If you come to the 2018 Monterey get together You might get to take my (1952) tanks home with you.
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Post by waldenwalrus on Jan 31, 2018 7:21:01 GMT -8
Hi All,
Since we opened the door to coated steel tanks, how does everybody feel about pre 1989 aluminum tanks. The ruptures have been very few for the amount of tanks in service, but regardless of how they may be tested, (eddy current or other methods) in my area nobody will fill them, period. I know that around the outer banks the dive shops don't seem to have a problem with them, but I know the locals in my area don't want to be the one with the potential for a catastrophic failure regardless of how slight the risk is. I know I don't want one. We have a cutaway in the shop that show three cracks forming around the neck of an older aluminum tank.
Or don't we discuss aluminum tanks on the vintage forum 
The Walrus
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Post by waldenwalrus on Jan 31, 2018 7:23:50 GMT -8
I will check with tom on the older tanks. He may or may not have the valves, periodically he scraps the aluminum and brass
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Post by crabbyjim on Jan 31, 2018 8:26:35 GMT -8
I have a set of aluminium doubles from 1974 that I will raffle of at the 2018 Monterey gathering.
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Post by nikeajax on Jan 31, 2018 9:23:28 GMT -8
Or don't we discuss aluminum tanks on the vintage forum The Walrus  Jaybird and The Walrus
This subject causes quite a bit of spittin' an' snarlin' between two schools of thoughts... But, as you so well pointed out, it's a rare occurrence! As long as you are religious about testing, you're good. But, seeing as you can't get them filled anywhere near you, it's a moot point, right, I hope... I can hear people beginning to fume and bluster just thinking about these tank as we speak... JB |
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Deleted
Deleted Member
Posts: 0
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Post by Deleted on Jan 31, 2018 11:48:36 GMT -8
Hi All,
Since we opened the door to coated steel tanks, how does everybody feel about pre 1989 aluminum tanks. The ruptures have been very few for the amount of tanks in service, but regardless of how they may be tested, (eddy current or other methods) in my area nobody will fill them, period. I know that around the outer banks the dive shops don't seem to have a problem with them, but I know the locals in my area don't want to be the one with the potential for a catastrophic failure regardless of how slight the risk is. I know I don't want one. We have a cutaway in the shop that show three cracks forming around the neck of an older aluminum tank.
Or don't we discuss aluminum tanks on the vintage forum
The Walrus
I have two 50cuin aluminum of the old style......I fill them myself.......so.........maybe you need to buy your own compressor......it'll pay for itself after many fills. |
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Post by vance on Jan 31, 2018 16:47:53 GMT -8
Ya know, those Luxfer aluminum tanks have served a lot of divers in the past. And lots of divers still use them. I have one. Its sole use is for my PCP air gun. Aluminum tanks are useful. Even for diving. BUUUUT, they're...., well,....not steel? Steel tanks are just cooler. Hella cooler. You know what I'm sayin'. Also, you can get them all over the place for no money. Show me an active, hydro'd aluminum tank from, say, 1942, like my double 38s? However, I don't have an opinion on this  . |
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Post by nikeajax on Jan 31, 2018 17:50:35 GMT -8
Steel tanks are just cooler. Hella cooler. You know what I'm sayin'. Also, you can get them all over the place for no money. homeboy, that's what I'm talkin' 'bout yo! Steel-72's are hella dope, dog!  An' kidney-crushers are where it's at fer hella phat back packs... Peaceout, LL Scrubjay |
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Post by SeaRat on Jan 31, 2018 18:32:30 GMT -8
Steel tanks are just cooler. Hella cooler. You know what I'm sayin'. Also, you can get them all over the place for no money. homeboy, that's what I'm talkin' 'bout yo! Steel-72's are hella dope, dog! An' kidney-crushers are where it's at fer hella phat back packs... Peaceout, LL Scrubjay The nice thing about this backpack by several manufacturers is that the weight belt fits nicely on the bottom structure of the backpack. A lot of people do not know this. I now have this backpack on my twin 52s, as I've moved my military harness over to a new set of tanks--super secret now until next week.   You can look down on this backpack from this view. The place where the weight belt sits is slightly flanged, so a tight or rubber weight belt will not slide off. But, you cannot put any weights in this area. Jaybird is correct about this type of backpack being "kidney-crusher," but it isn't the kidneys that are at risk. The full pressure will be applied to muscles right over the hip bones, and I know from experience that if you have a set of doubles, and the weight belt, sitting right there, and crawl out of the water (river in my case) more horizontally, there is enough pressure to cause a real pain, possibly a strained muscle, in this area. John |
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jviss
Pro Diver
Posts: 209
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Post by jviss on Sept 18, 2018 19:25:41 GMT -8
WalrusJohn, as I recall, it's actually a vinyl coating: at least it is in my Healthways and all the other tanks I've heard of. If you can do so, just leave it alone: it ain't hurtin' nobuddy! As far as the integrity of the tank goes, unless you see blistering/high spot, it's good: any rusting should cause such blistering because the oxygen molecules are attaching themselves to the iron molecules and thus taking up more space than previously... OK, now that I've said that, I'm sure I'm gunna get guff for it! Oh-well... JB Old thread, I know, but important. USD made tanks in the late 60's, early 70's, with vinyl outer coatings and epoxy inner coatings. From the 1967 catalog: So, internal epoxy, external vinyl or galvanized. |
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jviss
Pro Diver
Posts: 209
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Post by jviss on Sept 19, 2018 3:01:23 GMT -8
WalrusJohn, as I recall, it's actually a vinyl coating: at least it is in my Healthways and all the other tanks I've heard of. If you can do so, just leave it alone: it ain't hurtin' nobuddy! As far as the integrity of the tank goes, unless you see blistering/high spot, it's good: any rusting should cause such blistering because the oxygen molecules are attaching themselves to the iron molecules and thus taking up more space than previously... OK, now that I've said that, I'm sure I'm gunna get guff for it! Oh-well... JB Old thread, I know, but important. USD made tanks in the late 60's, early 70's, with vinyl outer coatings and epoxy inner coatings. From the 1967 catalog: So, internal epoxy, external vinyl or galvanized. |
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