Industry News
October 5, 2009 by admin
Filed under Industry News
When working with compressed gases you will quickly learn that each gas has its sweet spot. In a liquid propane (LP) tank for example, part of the volume is occupied by liquid and part is occupied by gas. The pressure of the gas is governed by the temperature of the liquid. When a propane tank gets too hot during warm summer months, liquid heats, gases expand, often causing release valves to engage. Too cold, and pressure will fall creating the opposite effect… No pressure! So how do you find that sweet spot and keep your propane pressure at MAXIMUM safe output? You can start by wrapping your tanks in something to keep them warm.
| Temperature | Vapor Pressure | ||
| (oF) | (oC) | (psig) | (bar) |
| -44 1) | -42.2 | 0 | 0 |
| -30 | -34.4 | 6.8 | 0.5 |
| -20 | -28.9 | 11.5 | 0.8 |
| -10 | -23.3 | 17.5 | 1.2 |
| 0 | -17.8 | 24.5 | 1.7 |
| 10 | -12.2 | 34 | 2.3 |
| 20 | -6.7 | 42 | 2.9 |
| 30 | -1.1 | 53 | 3.7 |
| 40 | 4.4 | 65 | 4.5 |
| 50 | 10.0 | 78 | 5.4 |
| 60 | 15.6 | 93 | 6.4 |
| 70 | 21.1 | 110 | 7.6 |
| 80 | 26.7 | 128 | 8.8 |
| 90 | 32.2 | 150 | 10.3 |
| 100 | 37.8 | 177 | 12.2 |
| 110 | 43.3 | 204 | 14.1 |
1) Boiling point of LPG-gas at atmospheric pressure
