Hong Kong Regulations
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GAS SAFETY (GAS QUALITY) REGULATIONS - REGULATION 4
Standard of purity
No person shall supply any gas specified in column 1 of the table to this
regulation which contains more than the proportion of sulphur specified
opposite thereto in column 2 of that table.
TABLE
PURITY OF GAS SUPPLIED
Column 1 Column 2 Type of gas Maximum proportion of sulphur Town gas
Natural gas
Liquefied petroleum gas 5 mg of hydrogen sulphide per standard cubic metre
5 mg of hydrogen sulphide per standard cubic metre
0.02% by mass total sulphur (Enacted 1990)
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