| Quality and other physical and chemical characteristics of natural gas are determined according to established standards and regulations. According to the rules of the GTS (gas transporting systems) Code natural gas, supplied to the gas transporting system, must meet the following requirements: |
| Parameter | Value |
| Methanecontent (C 1), mol.% | Minimum90 |
| Ethane content (C 2), mol. % | Maximum 7 |
| Propane content (C 3), mol. % | Maximum 3 |
| Butane content (C 4), mol. % | Maximum 2 |
| Pentaneandotherheavierhydrocarbons content(C 5+), mol. % | Maximum1 |
| Nitrogen content (N 2), mol. % | Maximum5 |
| Carboncontent(CO 2), mol. % | Maximum2 |
| Oxygencontent (O 2), mol. % | Maximum 0,02 |
| Higher combustion temperature (25° C/20° C) | Minimum 36,20 MJ/m3(10,06 kwatt•h/m3) Maximum 38,30 Мj/m 3 (10,64 kwatt•h/m3) |
| Higher combustion temperature (25° C/0° C) | Minimum 38,8MJ/m3 (10,80 kwatt•h/m3) Maximum 41,10 MJ/m3 (11,42 kwatt•h/m3) |
| Lower combustion temperature (25° C/20° C) | Minimum 32,66 MJ/m3 (09,07 kwatt•h/m3) Maximum 34,54 MJ/m3 (09,59 kwatt•h/m3) |
| Dew point temperature by moisture ° C at absolute gas pressure 3.92 MPa | Does not exceed minus 8 (-8) |
| Dew point temperature by the hydrocarbons at gas temperature not lower than 0 ° C | Does not exceed 0° C |
| Solids (mechanical impurities) content | No |
| Hydrogen sulphide content, g/m3 | Maximum 0,006 |
| Mercaptan sulfur content, g/m3 | Maximum 0,02 |
| Determination of physic-chemical parameters and other characteristics (hereafter FCP) of natural gas is carried out at the entry and exit points. Responsible for the quality of gas are: 1) at the entry point (except for entry points at the inter - state connection) - operators of related systems, gas companies, producers of biogas and other gas from alternative sources, that serve natural gas to the transportation system at the entry point. At the entry points at the inter-state connection, the customer (orderer) of transportation services is responsible; 2) at the exit points - the operator of the gas transporting system. |