Natural gas quality

Note

Observations

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Bara - the unit of measurement for absolute pressure (P_absolute); P_absolute = P_relative + P_atmospheric;

Relative pressure (P_relative) is the pressure measured by the manometer.

1)

a) The ranges for components C₂÷C₈+ may be exceeded at longer intervals for short periods mutually agreed upon by the adjacent system operators, provided that the limits related to relative density and Wobbe index are respected.

b) except for commercial delivery-pick-up points where natural gas is delivered to final customers directly connected to the upstream supply pipeline (CA).

2)

Except for the N₂ content in molar % of maximum 10 for the composition of natural gases from:

a) PM0009 Beia; PM0140 Alămor;

b) the physical exit points from the natural gas transmission system (ST), through which natural gas originating from the points provided for in letter a is also transported;

c) commercial delivery-pick-up points where natural gas is delivered to the natural gas distribution system (SD) connected to the CA or to final customers directly connected to the CA.

3)

The upper limit of the main components (CO₂, N₂) may be exceeded for a short period of maximum 7 days, a period established by mutual agreement between the adjacent system operators, provided that the limits related to relative density and the Wobbe index are respected.

4)

Except for a CO₂ content in molar % of maximum 8 for the composition of natural gases from:

a) PM0083 Abrămuț; PM0079 Cărani; PM0296 Mamu; PM0295 Burcioaia;

b) the physical exit points from the ST, through which natural gas originating from the points provided for in letter a) is also transported;

c) commercial delivery-takeover points where natural gas is delivered to SD connected to the CA or to final customers directly connected to the CA.

5)

Except for the oxygen content in mole % of maximum:

a) 0,2% mol near biomethane injection facilities in ST. Near sensitive industrial facilities and underground storage facilities, oxygen concentration limits can be further reduced to 0,02 or 0,001.

b) 0.5% mol near biomethane injection facilities in SD.

For the situations provided for in letters a) and b) the oxygen content is measured at the injection point of the biomethane in ST or SD, as the case may be.

All limits are specified as a 24 hour moving average, if an online oxygen analyzer is available. The 24 hour moving average is a statistical method used to smooth out rapid fluctuations in a data set and identify a clear trend over the course of a day. It calculates the average value of the mole % content using only the last 24 hours, continuously updating in real time as each hour passes.

6)

The maximum hydrogen sulfide limit of 5 mg/m³ may be accidentally exceeded by up to 6,5 mg/m³, for short periods mutually agreed upon between adjacent system operators.

Note​

Observations

7)

a) Except for natural gas requested to be sold at the request of the final customer, where the degree of odorization is established by mutual agreement between the parties involved, taking into account the type of odorization installation in the ST serving the respective place of consumption and which allows or does not allow the modification/reduction of the mercaptan concentration.

b) Except at cross-border interconnection points, where the maximum limits are 6 to 8 mg/m³ under standard conditions. The upper limit for mercaptans may be increased to a higher limit for a short period of maximum 48 hours, unless other conditions are agreed upon by the adjacent system operators.

8)

Except for total sulphur content at cross-border interconnection points, where the upper limit may increase to a higher limit for a short period of maximum 48 hours, unless adjacent system operators agree on other conditions.

9)

a) The maximum limit of the higher heating power may be exceeded for short periods established by mutual agreement between the adjacent system operators.

b) Except for commercial delivery-pick-up points where natural gas is delivered to final customers directly connected to the CA.

10)

Except for natural gas from PM0079 Cărani, where the maximum value of relative density is 0,72.

11)

a) Except for natural gas deliveries to SD connected to the CA or to final customers directly connected to the CA.

b) Except for the physical entry points into the ST : PM0282 Herepea, PM0010, Bunești, PM0026 Urziceni Nord, PM0123 Cucerdea and PM0162 Sâncel Blaj, where the water dew point temperature is -8 °C at the delivery pressure during the summer, respectively the interval between June 1 and September 30 of the current year.

c) Except for the physical exit points from the ST, through which natural gas originating from the physical points provided for in letter b) is transported.

d) If the compliant values of the water dew point cannot be ensured, the natural gas producer is obliged, upon written request of the natural gas transmission and system operator (TSO), for PM0026 Urziceni Nord, to reduce natural gas production, for a mutually agreed period, or to stop natural gas delivery, as the case may be.

12)

a) Except for natural gas deliveries to SD connected to the CA or to final customers directly connected to the CA.

b) Until July 31, 2027, the exception applies to natural gas originating from PM0299 Galbenu II.

c) If, after July 31, 2027, the compliant values of the hydrocarbon dew point cannot be ensured, the natural gas producer is obliged, upon written request of the TSO, for PM0299 Galbenu II, to reduce natural gas production, for a period established by mutual agreement, or to cease natural gas delivery, as the case may be.