pressure damage?

[Tau]

Over 100 Cycles my polluted water tank works perfect, but since 2-3 cycles I get randomly pressure damage and I don't why. Just one thing I made new, is the oxygen supply right from the tank.

Any suggestions?

https://steamcommunity.com/sharedfiles/filedetails/?id=1136008115

[GD]

3 tiles for larger amounts of fluids makes your tank save. 2 is not always enought. Polluted Water always makes more problems than normal water altough it is less dense (800 kg max per tile instead of water 1000).

You might also check if by any accident a weak material is used for the tiles. But I'm not totally sure about that it is not clear if soft materials like sediment rock really have influence on water pressure/structural integrity because walls with 3 tiles can hold any amount of water regardless of the material used.

[Tau]

I don't think that the 2 tiles wall is a problem. It had worked over 100 cycles and I have more tanks with only 2 wall tiles and it works great.

Rather I think it have something to do with the air pressure at my oxygen supply.

[Reaniel]

Air pressure doesn't cause (directly) damage to tiles. Only water pressure will.

It'd be helpful if you could provide the save file for your save. Otherwise, it's hard to find a cause with just a screenshot without even the detail prompt of the damaged tiles. Specifically, the material the damaged tiles are made of.

[Cryten]

Its possible adding more water to an allready compressed situation is translating damage to the tiles. IE if the air pressure is near max it can prevent the water from expanding to the tiles above. This is all theory of course. To test you can view the water tiles and see if any are above maximum pressure.

Ive observed this behaviour when dupes enter water that does not have other exit points creating compressed water tiles leading to damage.

[Reaniel]

And like I said, no one can help you if you continue to refuse to provide any relevent information.

You kept claiming air pressure is the culprit, and yet you're not providing the information on the bottom liqid tile (which will show if overpressure is occuring or not).

We raised the tile material issue being the #1 possibility, but you refuse to provide information on that as well.

I can't tell if you're trying to resolve the problem or just trolling for attention.

[PhailRaptor]

Originally posted by GD:

3 tiles for larger amounts of fluids makes your tank save. 2 is not always enought

I keep seeing this statement about minimum thickness of liquid resevoirs, and I have to wonder where it's coming from. Prior to Outbreak, I would routinely dig out a rather massive resevoir for clean H2O. I would line it with a single row of Granite Tiles. The only time I'd ever get pressure damage was when I initially began pouring my H2O reserves into the resevoir. And we're not talking a small little tank like pictured in the OP. We're talking, like, probably 100 tiles filled with clean H2O. I'll see if I can find the screenshot. Sadly that colony has since failed (I wasn't paying attention to food supply).

[EDIT] Found it.

http://steamcommunity.com/sharedfiles/filedetails/?id=958839206

[AquaX]

3 tile thickness is the best to prevent pressure breaches from water. you can use 2 if your pool is small but it can easily reach beyond what 2 tiles fast. Also metal tends to handle pressure better than reg tiles can. For the clean water side, the airflow tiles reduced the pressure to the walls so it wont break. For the polluted side, i think i think 1 more tile of water and the dmg might start occuring. The materials used to make the tile also affect how long the tile last. Abysslite last around 50-70 cycles before you see it crack.

Normally, all vet players would advise to just have a 3 tile flooring to prevent this from happening at all. Just set it up when you are building the base and you are golden.

[Tau]

Originally posted by Reaniel:

And like I said, no one can help you if you continue to refuse to provide any relevent information.

You kept claiming air pressure is the culprit, and yet you're not providing the information on the bottom liqid tile (which will show if overpressure is occuring or not).

We raised the tile material issue being the #1 possibility, but you refuse to provide information on that as well.

I can't tell if you're trying to resolve the problem or just trolling for attention.

I'm don't trolling or so, I just ask something. Sorry that I given't enough informations about my problem. First my walls were off magmatite, than obsidian and at least abysalite, I tried different materials, but that don't make a different.

But I found the problem:
Like Cryten said: "IE if the air pressure is near max it can prevent the water from expanding to the tiles above.", I had exact this problem. The water pressure was about 1100kg/tile and can't go up because the air pressure. I pumped the Water out about a pressure of 800kg/tile and the pressure damage is gone for the moment.

A really easy solution, I do not know why I did not come on it, it was late last night.

[GD]

It's important to distinguish between normal water and Polluted Water. The last makes much more problems with pressure damage in my experience. Maybe due to that fact that it maximizes tiles at lower max (800 vs. 1000).

You can make the tank-wall out of Air Flow tiles it will hold any pressure, but with Polluted Water you slowly get Polluted Oxygen on the Top and Right tiles reaching, depending on the amount of water it can get to extreme amounts. If it is germ-ified water, the problems are even greater. You might get Air-born Food-Poisining which is nasty. And the Fluid and sourrounding air are in direct contact, which is not always wanted because of temperature exchange. Even if you enclose it in 1 normal tile and 1 Air-Flow tile you still get more and more Polluted Oxygen in the Tank, and it will not have max-pressure and continue to mount to insane pressure like some of the natural PH2O lakes in the slime biome. For normal water it is however applicable.

[Storm[HUN]]

You always want a monimum of 3 tile thick walls for fluid storage. My giant reservoir has 5 thick walls - it is mainly composed of natural stone present, I only replaced soft blocks such as sand and dirt with tiles, and the internal 1 block layer is tiles too.