LAND, PUBLIC WORKS AND UTILITIES
211
LPG distributed in Hong Kong consists of a butane (75 per cent)/propane (25 per cent) mix with a calorific value 49.6 MJ/kg and an approximate specific gravity of 2. About 70 per cent of total sales is distributed to consumers, via a dealer network, in portable cyclinders. The remaining (30 per cent) is in the form of piped gas supplies from bulk LPG storage and vaporiser installations which are located in, or adjacent to the developments being supplied. Since 1982 when the government introduced a piped gas policy in order to discourage the further growth of the gas cylinder market, the percentage of customers using total cylinders has fallen from around 71 per cent to 43 per cent in 1988. Currently there are about 800 000 LPG customers of whom 27 per cent are using piped supplies.
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