What is Propane?
Propane is a colourless, odourless gas which belongs to the alkanes. Since propane liquefies at a relatively low pressure, even at normal temperatures, large amounts of energy can be stored in the liquid phase.
Because of the solubility of alkanes in one another, DIN 51622 defines the common technical propane on the market as a mixture of at least 95% propane and the rest a mixture of ethane, ethene, butane and butene.
HD-5 standard is defined as propane with maximum 5% propene / propylene and not more than 5% of butanes and ethane. Hence, 99% propane and 1% propylene can also be labelled as HD-5 propane. The limits are important, because higher amounts of propylene can cause problems in engines. To use the also available HD-10 propane gas for example, a technical approval is required.
Liquefied Petroleum Gas is a mixture of propane and butane. Depending on the region and the time of the year, the ratio may vary from 5% butane to 40% butane.
Through extraction from the liquid phase of the tank and complete evaporation, an increase in concentration of liquid components can be counteracted.
