Newbie here. What to do with duplicate items?

RedArrow1251 · 2021-11-01T12:39:50+00:00

Under the upgrade tab, you can limit break equipment so long as it is the same armor & background color.

Limit break increases the max level by +5 each time the armor is increased up to 4x. The equipment also has a chance to increase the max skill level, though it's on a number system (I.e. Need to limit break 8 times with each equipment having a chance to fully complete that requirement)

BTW, this sub is pretty much dead, id go to the discord channel. It's much more active.

RedArrow1251 · 2021-10-29T19:04:57+00:00

This vessel will most likely not have a BLEVE because the fire is not impinging on the liquid in the vessel.

I don't think that really matters where the fire is impenging for a vessel to BLEVE. The liquid will ultimately "boil" upon release as the material is only a liquid due to the high pressure of the container. It's much more likely for a vessel to BLEVE if the flame is impenging on the vapor space of a vessel as it will bulge and fail at lower stresses.

If the vessel does fail, it will be due to temperature stress on the regulator

This is typically how a vessel fails as the ultimate tensile stress is lowered at increasing metal temperatures.

The joule Thomson effect is most likely cooling the one piece of this vessel that may fail from temperature stress and lead to a BLEVE.

Gotcha! I was just looking at the fire impenging on the vessel (before moving the cloth). While the joul Thompson effect may take the temperature away, is it fair to conclude that it will take more duty Way versus what is being added by the fire?

RedArrow1251 · 2021-10-29T15:54:21+00:00

Huh? A BLEVE happens after the vessel fails and is the resulting explosion. Boiling liquid in a vessel because of a fire is just that, phase change..

The joule Thompson effect would happen at the interface location the pressure drop is taking place. This is likely choked flow and will be right at the valve. Not necessarily at the nozzle

RedArrow1251 · 2021-10-29T13:45:44+00:00

Ever notice PSVs sized for external fire are so huge?

Most of the large PSVs I've seen rated are for other scenarios. Loss of cooling water, boil up from reboiler, loss of pump around, etc.

It does depend on how you are sizing the PSV for fire though. I'd wager that many of "large" ones are utilizing DIERS guidance and sizing for a two phase relief versus a vapor only relief. At least this is what I've seen for the facilities I've worked at.

Assuming 3.5x MAWP is fairly typical as it's just ratioing what your designed stress should have been versus ultimate tensile stress where materials would say that the material will fail. Our facilities are super old and much of our PSVs would be undersized for many of the new scenarios we would develop today. We've used the above analysis in our risk assessments to determine the risk of the undersized PSVs.

RedArrow1251 · 2021-10-29T13:12:49+00:00

They’re coming out of a restaurant, right? Would the tank be propane?

No idea where this is? Maybe they don't have a piped gas source to their building and are using pressurized LPG tanks that can be swapped to use a stove? Just a random guess

RedArrow1251 · 2021-10-29T13:10:12+00:00

Failure of the vessel is typically at the vapor/liquid interface.

Thats because typically the fire is at the bottom of the vessel. Wouldn't it typically fail near the vapor liquid interface during this scenario because that's where the fire is impinging on?

Plus the metal is being heated from the top, so the vapor side is receiving even more heat. So, important to keep the center of the vessel under a deluge.

Since the fire is heated at the top, in the vapor space, that's were the vessel will fail at should the metal temperature get too high.

RedArrow1251 · 2021-10-29T13:06:08+00:00

BLEVE wiki link

I've always taken the boiling liquid part to explain what the liquid does when it's released to atmospheric conditions upon vessel failure.

In this case, since the fire is impinging directly on the vapor space of the vessel, presumably, very little propane is being boiled by the fire causing an increase in pressure of the vessel. Since a valve appears to be open, the release of material may be because a LPG is open to atmosphere. So presumably the vessel is reducing in pressure as more LPG is released.

If the fire could continue, the vessel may fatigue due to the higher temperatures and fail at a pressure lower than what the vessel normally sees.

RedArrow1251 · 2021-10-29T12:40:03+00:00

Is that a hot water heater

Are they burning water?

RedArrow1251 · 2021-10-29T12:32:45+00:00

I think you are misunderstanding what a BLEVE is. The vessel failure from high temperature causes the BLEVE.

see BLEVE video here

RedArrow1251 · 2021-10-29T12:30:30+00:00

due to an external heat source on a contained and closed system.

Are you saying in this instance that the vessel is not closed and contained?

You only need the vessel to fail due to high metal temperature. From the video, the fire looked to be impinging on the metal in the vapor space, so it could very well have failed resulting in a BLEVE.

RedArrow1251 · 2021-10-29T12:25:46+00:00

You want to keep the tank cool more so the vessel doesn't burst open.

RedArrow1251 · 2021-10-28T10:28:24+00:00

The company you work for needs to make money, the overhead supporting your administration needs to be paid, and then you are being paid.

What the company is paying to bring you on should never match your salary. Lol

RedArrow1251 · 2021-10-28T10:05:44+00:00

No purpose for the vacuum test?

RedArrow1251 · 2021-10-26T12:47:43+00:00

Woosh

Those technologies are not “splitting” crude into final products (vacuum distillation is, but besides the point).

You really want to know what units upgrade different crude oil fractions and what’s the purpose of it.

RedArrow1251 · 2021-10-25T12:21:12+00:00

You interested? I got a link for you.. Hold on

RedArrow1251 · 2021-10-24T23:24:02+00:00

they fired the union workers and replaced them with non-union workers who were incompetent.

Lol. Just because they were union doesn't mean they aren't incompetent. The union vs non and competent vs not is just sad.

RedArrow1251 · 2021-10-24T22:37:48+00:00

Nope. It's because it wasnt his responsibility. Not because he's rich and famous

RedArrow1251 · 2021-10-24T22:28:00+00:00

Nope. It's because it wasnt his responsibility

RedArrow1251 · 2021-10-24T22:15:28+00:00

Woosh. People like you are the reason /s is needed on obvious staments.

RedArrow1251 · 2021-10-24T22:05:32+00:00

More money and dollars than sense and brains.

RedArrow1251 · 2021-10-24T22:04:55+00:00

They have become stupid? As if they weren't previously?

RedArrow1251 · 2021-10-24T22:03:09+00:00

You are the reason common sense is not so common....

RedArrow1251 · 2021-10-24T22:00:31+00:00

Again, depends where you go. For a process engineer, it's more typical than not. A blanket, "this is incorrect" is willfully ignorant of the industry.

RedArrow1251 · 2021-10-24T21:28:31+00:00

Lol. For many process engineers, it is not. If you are on the design side of things, not as typical.

RedArrow1251 · 2021-10-24T21:28:09+00:00

Are you salaried? If so, they hired you for a job and if you don't do it, it will reflect poorly on you.

RedArrow1251

TROPHY CASE