Air cylinders

[Tracy]

This article should explain why the need for extra testing. If it passes you should be fine. Note only 15 tanks cracked, but 15 is too many and thus the extra testing on 6351 alloy tanks.

PSI-PCI - A short Review of 6351 Alloy Aluminum Cylinders

Only 15 cracked? Where did you come up with that? I have more than 15 cracked ones in my basement right now.

 

[CuzzA]

According to the article as of 2011. Of course there may have been more, but that's what was recorded. I should have said 19 documented cases with PSI/PCI of catastrophic failure.

My mistake. Good catch.

A total of 15 SCUBA and fire fighter SCBA cylinders have ruptured explosively in the US from sustained load cracking with an additional 4 at international locations. Although small in numbers, these ruptures caused property damage and personal injury.

 

[Tracy]

According to the article as of 2011. Of course there may have been more, but that's what was recorded. I should have said 19 documented cases with PSI/PCI of catastrophic failure.

My mistake. Good catch.

Ok, catastrophic failure is different. I find one or two a month with cracked threads. It is very common with the old alloy.