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Duplicant.png
This article contains outdated information that is inaccurate for the current version. It was last updated for AP-398142. Unreflected changes in the discussed game mechanics are detailed here: EX1-444349
This article contains outdated information that is inaccurate for the current version. It was last updated for AP-398142. Unreflected changes in the discussed game mechanics are detailed here: EX1-444349

Liquid is a state of elements.

Mechanics[]

  • A Liquid is any matter in game that is not a solid entity or gas entity. Almost any material in the game will melt given a high enough temperature.
  • Liquids are affected by gravity and can flow across level floors, through open doors and down ladders.
  • A Duplicant who finds themselves submerged with no way to rise above the level of the liquid will either drown after a set period without air or will burn to death in hot liquids.
  • Elements with a lower density tends to rise above others. Mixed Liquids with different density and in sufficient amounts will form several layers after a period of time.
  • Liquids exposed to space will be destroyed, unless protected by Drywall.
  • Liquids can occupy two vertical tiles and touch the solid tile third above. Thus it is possible to make Liquid Airlock.
  • Liquids evaporate at 3 degrees above the specified vaporization point, and freeze at 3 degrees below the specified freezing point.
    • If such transformation happens inside a Liquid pipe, the pipe will be damaged.
    • Phase change will not occur if the content of the pipe is less than 1kg.
    • If a liquid is atop any tile with a temperature exceeding a phase change temperature, it will under go a phase change. This includes tiles with virtually zero Thermal Conductivity, such as Abyssalite.
  • All liquids have a certain max mass per tile; above this limit, the liquid will "flow" to the tile above it (provided it's not a solid tile), pushing away the air in the tile. If several such liquid tiles are "stacked" atop each other, pressure will build in the bottom tiles, adding approximately 1% of the above mass to each tile. This pressure can eventually cause damage to surrounding solid tiles.
  • Liquids cannot exist in extremely low amounts (e.g. 1mcg, not like a gas), unless if it's in pipes. [needs numbers on the minimum amount]

Pressure Damage[]

Sedimentary Rock Tiles taking pressure damage from over 962kg of petroleum

Liquid tiles which accumulate too much mass (such as from depth stacking) will begin to visually crack before causing pressure damage to the tiles containing them and seep through as droplets until either the tile breaks entirely (losing all materials used to construct it and allowing the liquid to flow out), the pressure is released, or the tile is reinforced with more tiles. The mass at which a tile begins to take pressure damage is dependent upon the liquid's mass per tile(that is, the maximum amount of liquid that can be put in a tile without it overflowing), the tile's strength, the type of tile, and the thickness of the wall. Walls 3 tiles or thicker are immune to pressure damage entirely. In addition, certain tiles are immune to pressure damage under any circumstances. Some pressure-immune tiles and buildings are airflow tiles, manual airlocks, mechanized airlocks, bunker doors, and solar panels.

The maximum pressure a liquid tile can be at before damaging its tank walls can be calculated using the following formula:

max pressure = (liquid MPT) * (1 + t * s * k),

where t is the thickness of the wall (either 1 or 2), s is the strength of the material (located in the solids.yaml file) making up the wall, and k is the "strength multiplier", found in the table below. It should be noted that while these formulas should give the maximum pressure a wall can withstand before taking damage, in some cases there appears to be a rounding error of less than 1kg. Therefore, it is best to ensure the tank will be dealing with pressures less than the maximum pressure, both to avoid potential rounding errors and as a matter of general caution.

Tile Modifiers (k values)
Tile Type Strength Multiplier (k values)
Natural Tile tile mass / maxMass (maxMass as defined in solid.yaml for the material)
Tile 1.50
Insulated Tile 1.00
Plastic Tile 1.00
Metal Tile 1.00
Window Tile 1.00
Bunker Tile 10.00
Carpeted Tile 1.00
Farm Tile 1.00
Hydroponic Farm 1.00
Transit Tube Crossing 1.00
Heavi-Watt Joint Plate 1.00
Heavi-Watt Conductive Joint Plate 1.00
Gantry 0.02
Common Material Strengths
Material Strength
Aluminum 1.0
Aluminum Ore 0.7
Ceramic 1.0
Clay 0.2
Copper 0.8
Copper Ore 0.7
Diamond 2.5
Dirt 0.2
Fossil 0.2
Glass 1.0
Gold 0.7
Gold Amalgam 0.8
Granite 1.5
Igneous Rock 1.0
Iron 1.0
Iron Ore 0.9
Isoresin 0.4
Lead 0.8
Mafic Rock 1.0
Niobium 0.8
Obsidian 1.0
Plastic 0.4
Sandstone 0.5
Sedimentary Rock 0.2
Steel 2.0
Thermium 0.8
Tungsten 0.9
Wolframite 0.8
Maximum Pressure Examples
Liquid Mass Per Tile (kg/tile) Tile Type Tile Strength Max Pressure - 1 tile (kg) Max Pressure - 2 tiles (kg)
Water 1000 Igneous Rock Tile 1.0 2500 4000
Crude Oil 870 Igneous Rock Tile 1.0 2175 3480
Petroleum 740 Igneous Rock Tile 1.0 1850 2960
Water 1000 Sedimentary Rock Tile 0.2 1300 1600
Crude Oil 870 Sedimentary Rock Tile 0.2 1131 1392
Petroleum 740 Sedimentary Rock Tile 0.2 962 1184

In general, higher strength multipliers correspond to more pressure-resistant tiles. Of course, the base material strength also plays an important role in the maximum pressure a tile can withstand. Again, note that some pressures may be off by up to 0.1kg due to rounding, so exercise caution when approaching these limits.

List of Liquids[]

Ordered by density, from lightest to heaviest.

Icon Name Freezing point
[°C]
Freezes into Vaporization point
[°C]
Evaporates into SHC TC Density
[g/mol]
Thermal range [°C]
Liquid Hydrogen.png Liquid Hydrogen -259.15 Solid Hydrogen -252.15 Hydrogen 2.400 0.100 1.00794 7.00
Liquid Helium (unused) -273.2 -268.93 Helium 0.140 0.236 4 4.27
Visco-Gel.png Visco-Gel -30.65 Solid Visco Gel 479.85 Naphtha 1.550 0.450 10 449.20
Liquid Carbon.png Liquid Carbon 3551.85 Refined Carbon 4826.85 Gas Carbon 0.710 2.000 12.0107 1275.00
Liquid Oxygen.png Liquid Oxygen -218.79 Solid Oxygen -182.96 Oxygen 1.010 2.000 15.9994 35.83
Methane.png Methane -182.6 Solid Methane -161.5 Natural Gas 2.191 0.030 16.044 21.10
Water.png Water -0.65 Ice 99.35 Steam 4.179 0.609 18.01528 98.70
Polluted Water.png Polluted Water -20.65 Polluted Ice 119.35 Steam 4.179 0.580 20 140.00
Salt Water.png Salt Water -7.5 Brine 99.69 Steam 4.100 0.609 21 107.19
Brine.png Brine -22.5 Brine Ice 102.75 Steam 3.400 0.609 22 125.25
Liquid Phosphorus.png Liquid Phosphorus 44.15 Phosphorus 280.45 Gas Phosphorus 0.770 0.236 30.973762 236.30
Liquid Sulfur.png Liquid Sulfur 115.2 Sulfur 337 Gas Sulfur 0.700 0.200 32 221.80
Molten Salt.png Molten Salt 799.85 Salt 1464.85 Salt Gas 0.700 0.444 32 665.00
Liquid Chlorine.png Liquid Chlorine -100.98 Solid Chlorine -34.6 Chlorine 0.480 0.008 34.453 66.38
Liquid Carbon Dioxide.png Liquid Carbon Dioxide -56.55 Solid Carbon Dioxide -48.15 Carbon Dioxide 0.846 1.460 44.01 8.40
Liquid Propane.png Liquid Propane (unused) -188.2 Solid Propane -42.15 Propane 2.400 0.015 44.1 146.05
Ethanol.png Ethanol -114.05 Solid Ethanol 78.35 Gas Ethanol 2.460 0.171 46.07 222.40
Magma.png Magma 1409.85 Igneous Rock 2356.85 Rock Gas 1.000 1.000 50 947.00
Molten Glass.png Molten Glass 1126.85 Glass 2356.85 Rock Gas 0.200 1.000 50 1230.00
Liquid Resin.png Liquid Resin 20 Resin 125 25% Isoresin
75% Steam
1.100 0.150 52.5 105.00
Liquid Iron.png Liquid Iron 1534.85 Iron 2749.85 Gas Iron 0.449 4.000 55.845 1215.00
Molten Aluminum.png Molten Aluminum 660.3 Aluminum 2470 Aluminum Gas 0.910 20.500 55.845 1809.70
Liquid Copper.png Liquid Copper 1083.85 Copper 2560.85 Gas Copper 0.386 12.000 63.546 1477.00
Liquid Steel.png Liquid Steel 1083.85 Steel 3826.85 Gas Steel 0.386 80.000 63.546 2743.00
Nuclear Waste.png Nuclear Waste 26.9 Solid Nuclear Waste 526.9 Nuclear Fallout 7.440 6.000 ? 500
Petroleum.png Petroleum -57.15 Solid Petroleum 538.85 Sour Gas 1.760 2.000 82.2 596.00
Liquid Niobium.png Liquid Niobium 2476.85 Niobium 4743.85 Gas Niobium 0.265 54.000 92.9 2267.00
Naphtha.png Naphtha -50.15 Solid Naphtha 538.85 Sour Gas 2.191 0.200 102.2 589.00
Liquid Tungsten.png Liquid Tungsten 3421.85 Tungsten 5929.85 Gas Tungsten 0.134 4.000 183.84 2508.00
Liquid Gold.png Liquid Gold 1063.85 Gold 2855.85 Gas Gold 0.129 6.000 196.966569 1792.00
Molten Lead.png Molten Lead 327.5 Lead 1749 Gas Lead 0.128 11.000 196.966569 1421.50
Mercury (unused) -38.8 Solid Mercury 356.75 Gas Mercury 0.140 8.300 200.59 395.55
Super Coolant.png Super Coolant -271.15 Solid Super Coolant 436.85 Gas Super Coolant 8.440 9.460 250 708.00
Crude Oil.png Crude Oil -40.15 Solid Crude Oil 399.85 Petroleum 1.690 2.000 500 440.00
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