Fluids / Propylene glycol, 40 % by volume
Density of propylene glycol, 40 % by volume vs temperature
A 40 % by volume propylene glycol solution, freeze protection to about −21 °C — the middle charge — full winter protection at a manageable pumping penalty.
Density in kg/m³, from -20 to 100 °C. The chart and the table below are the same numbers; the table is the one you can copy.
| Specific heat | 3.702 kJ/(kg·K) |
| Dynamic viscosity | 4.59 mPa·s |
| Thermal conductivity | 0.384 W/(m·K) |
| Temperature (°C) | Density (kg/m³) | Row |
|---|---|---|
| -20 | 1,053.1 | published |
| -10 | 1,050 | published |
| 0 | 1,046.3 | published |
| 10 | 1,042.1 | published |
| 20 | 1,037.4 | published |
| 30 | 1,032.2 | published |
| 40 | 1,026.4 | published |
| 50 | 1,020.2 | published |
| 60 | 1,013.4 | published |
| 70 | 1,006.2 | published |
| 80 | 998.4 | published |
| 90 | 990.1 | published |
| 100 | 981.2 | published |
Rows marked published land exactly on a source anchor and are the tabulated figure. The rest are this library’s interpolation between the two anchors either side — good enough to design with, and said out loud so you can decide that for yourself.
Dow, Engineering and Operating Guide for DOWFROST and DOWFROST HD, SI tables, by volume; typical values for inhibited product · validated -20 to 100 °C · interpolated between 25 published anchors (values held, not extrapolated, past the ends)