Mr_Asa said:alfadriver said:In reply to Pete. (l33t FS) :
Very true, but steel tanks are reasonably equal.
No.
Steel, as a material, reacts roughly the same in tension vs compression.
Shape of the material determines how it will react to positive or negative pressure deltas
The shape of a propane storage tank is the same as a sub. So it's more down to the thickness of the steel and what it would fail at in compression. It would work for a little depth. Not a good idea, sure.
Keith Tanner said:Streetwiseguy said:In reply to alfadriver :
Have you watched Mythbusters and the rail car tank? 14.5 psi...
Was that rail car intended to carry pressurized gas, or was it just for something like oil? If the latter, it wouldn't be designed for much pressure differential of any sort.
Even if designed to hold pressure...
Most brewing tanks are rated at 14.9 psi. They can handle significantly more than that quite safely. They are rated only rated for something like -1 psi. Our emergency PRVs (pressure relief valves) have positive pressure and negative pressure settings. And yeah, it's like -0.5 psi.
Kegs are rated for like 30/-1 psi.
alfadriver said:Mr_Asa said:alfadriver said:In reply to Pete. (l33t FS) :
Very true, but steel tanks are reasonably equal.
No.
Steel, as a material, reacts roughly the same in tension vs compression.
Shape of the material determines how it will react to positive or negative pressure deltas
The shape of a propane storage tank is the same as a sub. So it's more down to the thickness of the steel and what it would fail at in compression. It would work for a little depth. Not a good idea, sure.
This is like saying a Model T and a Ferrari 296 are both cars built in a factory, and so should be able to race on the same track in a manufacturers race.
Its technically true, but it misses key details
We called about doing a job this morning at a local government bldg.
Sorry, the Coast Guard is using the council chambers for the OceanGate implosion investigation this week and the BBC is filming it.
In more "Things that make you go WTF."
They tracked navigation by handwriting details in a notebook, then typing those details in an excel sheet, then inputting those coordinates into mapping software.
In reply to Mr_Asa :
Yep, that's the room we are supposed to be working on.
I have to wonder why this investigation is happening in Charleston, SC instead of in DC or closer to where the Titan actually sank.
In reply to Toyman! :
Probably because that's where the people tasked with doing the investigation are based. It doesn't really have to be held anywhere near where the incident happened.
In reply to Keith Tanner :
Could be.
A little reading shows, "Base Charleston is slated to become the service’s largest homeport and a base for global operations, training, and support."
Learn something new every day.
Keith Tanner said:In reply to Toyman! :
Probably because that's where the people tasked with doing the investigation are based. It doesn't really have to be held anywhere near where the incident happened.
Yup.
Different bases have different specialties. Andrews AFB is home of Air Force One and all that entails. Marine Base Quantico teaches officers, and is home to the Combat Development Center. MacDill AFB houses CentCom.
For whatever reason its hard to discern the actual mission that USCG Base Charleston does from their official websites, but there are mentions of Marine safety and search and rescue. Those feel like they are common to most CG stations, though?
The only thing I see outstanding about Charleston is the hint at global operations instead of sector operations, and the U.S. Coast Guard Maritime Law Enforcement Academy training facility.
Maybe they needed the lawyers and instructions in marine law.
Toyman! said:The only thing I see outstanding about Charleston is the hint at global operations instead of sector operations, and the U.S. Coast Guard Maritime Law Enforcement Academy training facility.
Maybe they needed the lawyers and instructions in marine law.
Makes sense, especially if they are gonna suggest any sort of new regulations as a result of this.
The co-founder of OceanGate, Guillermo Söhnlein, has stated that we may never know what caused the implosion, among other gems...
I'm gonna have to call BS on that one. These people are suffering from severe rectal-cranial inversion.
A CEO with an egomaniacal streak two miles wide went against basically every accepted practice for DSV construction and safety, canned everybody who disagreed with him, and then touted himself as a pioneering maverick being held back by the system. He then built his "miracle sub" whilst cutting so many corners that the end path was circular. The following operations of the Titan read like a comedy of errors, resulting ultimately in the ill-fated dive of 18 June 2023. The end result was his death along with the needless deaths of four others, three of whom were just along for the ride as "crew members".
On the contrary, Mr. Sohnlein, we pretty much have the root cause nailed down at this point.
SMDH...
The BBC has pretty good coverage of the hearings, BTW. Makes sense if they actually have a crew in the room.
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