APPENDIX A : SINGAPORE NATURAL GAS SPECIFICATIONS Natural Gas Specification Wobbe Index (WI) 45.2 – 52.0 MJ/m3 Gross heating value 35.3 – 50.3 MJ/m3 Hydrocarbon dew point 12.8 °C @ 50 bar Water dew point 9.4 °C @ 50 bar Free liquids zero (0) Methane (min) 80 % by volume of total reactants Oxygen (max) 0.1 % by volume Carbon dioxide (max) 5 % by volume Nitrogen (max) 5 % by volume Total inerts (max) 10 % by volume Hydrogen sulphide (max) 8 ppm by volume Total sulphur (max) 30 ppm by volume Particulate size (max) 10 micron Particulate quantity (max) 3 ppm by weight Potassium and Sodium (max) 0.5 ppm by weight Lead (max) 1 ppm by weight Magnesium (max) 2 ppm by weight
