Terrible Dive shops

[Zero]

It is interesting to note that the two guys who found this cylinder (and took the photos) like to experiment, ala the myth busters of the scuba industry.

OOOO wheres them pics?

Matt

[Sarah]

They're in the ScubaMagazine Gallery!

Thanks Bama, scary cyliner photos!

[BamaCaveDiver]

OOOO wheres them pics?

Matt

The pics of the cylinder are in the gallery. They took them as they discovered the leaks while filling the cylinder (the cylinder had just came back from passing hydro so it should be okay to fill, right? wrong!) I am not sure how much pressure they had in it when they noticed the bubbling, but both of them were reported to be dancing around for a few minutes.

I wish they had some photos of some of the other wild experiments they have concocted over the years, like showing that any composition of oring can be turned into to cinders if it is hit with enough pressure just right.

[Zero]

I wish they had some photos of some of the other wild experiments they have concocted over the years, like showing that any composition of oring can be turned into to cinders if it is hit with enough pressure just right.

Please post them when you get some. Nothing like the destruction of otherwise perfectly working objects just for laughs.
We do get visual inspections out here with hydros. They also do an eddy something or other. Not too fluent in the technical terms but it sounded like it picked up neck and thread cracks thats the eyes miss. Could be wrong though.

Matt

[BamaCaveDiver]

Please post them when you get some. Nothing like the destruction of otherwise perfectly working objects just for laughs.
We do get visual inspections out here with hydros. They also do an eddy something or other. Not too fluent in the technical terms but it sounded like it picked up neck and thread cracks thats the eyes miss. Could be wrong though.

Matt

Usually they are doing it to satisfy their own curiosity when things get slow and they are a bit bored. I think after the incident with that cylinder they may start recording a bit more of their findings for future reference.

The Eddy test exposes crakcs and voids not readily visible by recording spikes as an electrical field is introduced across the medium. The machine has to be tuned to the alloy being tested, so they were only effective on certain AL alloys in the past, but have been enhanced to be useful on the newer alloys (still not useful on steel despite what some testers may say as they attempt to pay for their machine.) You use the Eddy test to gain an idea of where the crack is, and then look under high magnification to positively indentify it. An unskilled tester can easily produce false positives simply by not turning the probe through the threads at a slow steadt rate, so the visual follow up is definitely required to fail the cylinder.