4.2. NG/biomethane 4.2.1. "G20""High Gas" (nominal 100 per cent Methane) Table A3/9 "G20" "High Gas" (nominal 100 per cent methane) Characteristics Units Basis Limits Test method Minimum Maximum Composition: Methane % mole 100 99 100 ISO 6974 Balance (1) % mole 1 ISO 6974 — — N2 % mole ISO 6974 Sulphur content mg/m3(2) 10 ISO 6326-5 — — Wobbe Index (net) MJ/m3(3) 48.2 47.2 49.2 (1) Inerts (different from N2) + C2 + C2+. (2) Value to be determined at 293.15 K (20 °C) and 101.325 kPa. (3) Value to be determined at 273.15 K (0 °C) and 101.325 kPa. 4.2.2. "K-Gas" (nominal 88 per cent Methane) Table A3/10 "K-Gas" (nominal 88 per cent methane) Characteristics Units Limits Test method Minimum Maximum % v/v KS M ISO 6974, ASTM Methane 88.0 - D1946, ASTM D1945-81, JIS K 0114 % v/v KS M ISO 6974, ASTM Ethane - 7.0 D1946, ASTM D1945-81, JIS K 0114 % v/v KS M ISO 6974, ASTM C3 + hydrocarbon - 5.0 D1946, ASTM D1945-81, JIS K 0114 % v/v KS M ISO 6974, ASTM C6 + hydrocarbon - 0.2 D1946, ASTM D1945-81, JIS K 0114 KS M ISO 6326-1, KS M ISO 19739, Sulphur content ppm - 40 ASTM D5504, JIS K 0127 KS M ISO 6974, ASTM Inert gas (CO2, N2, etc.) vol % - 4.5 D1946, ASTM D1945-81, JIS K 0114
4.2. NG/biomethane 4.2.1. "G20""High Gas" (nominal 100 per cent Methane) Table A3/9 "G20" "High Gas" (nominal 100 per cent methane) Characteristics Units Basis Limits Test method Minimum Maximum Composition: Methane % mole 100 99 100 ISO 6974 Balance (1) % mole — — 1 ISO 6974 N2 % mole ISO 6974 Sulphur content mg/m3(2) — — 10 ISO 6326-5 Wobbe Index (net) MJ/m3(3) 48.2 47.2 49.2 (1) Inerts (different from N2) + C2 + C2+. (2) Value to be determined at 293.15 K (20 °C) and 101.325 kPa. (3) Value to be determined at 273.15 K (0 °C) and 101.325 kPa. 4.2.2. "K-Gas" (nominal 88 per cent Methane) Table A3/10 "K-Gas" (nominal 88 per cent methane) Characteristics Units Limits Test method Minimum Maximum Methane % v/v 88.0 - KS M ISO 6974, ASTM D1946, ASTM D1945-81, JIS K 0114 Ethane % v/v - 7.0 KS M ISO 6974, ASTM D1946, ASTM D1945-81, JIS K 0114 C3 + hydrocarbon % v/v - 5.0 KS M ISO 6974, ASTM D1946, ASTM D1945-81, JIS K 0114 C6 + hydrocarbon % v/v - 0.2 KS M ISO 6974, ASTM D1946, ASTM D1945-81, JIS K 0114 Sulphur content ppm - 40 KS M ISO 6326-1, KS M ISO 19739, ASTM D5504, JIS K 0127 Inert gas (CO2, N2, etc.) vol % - 4.5 KS M ISO 6974, ASTM D1946, ASTM D1945-81, JIS K 0114