RIYADH: Saudi Aramco maintained propane contract prices for June month on month at $580 per tonne while price for butane was set at $565 a tonne. Propane and butane are types of liquefied petroleum gas with different boiling points. LPG is mainly used as a fuel for cars, heating and as a feedstock for other petrochemicals. Aramco’s OSPs for LPG are used as a reference for contracts to supply the product from the Middle East to the Asia-Pacific region. China is the world"s largest consumer and importer of LPG, or combination of propane and butane. China’s imports of LPG jumped about 46 percent to 3.08 million metric tons in March from February.