Natural Gas Metering Unit

Design Input

COMMERCIAL GAS METERING UNIT

_________________ LLC "ZHBZ1" _ st. Ufa tract-4 _

3. Operating mode (seasonally, around the clock, evenly)

4. Gas flow rate:

Qmin ___ 300 _______ nm3/hour, Qmax ____ 2800 ______ nm3/hour.

5. Gas pressure at flowmeter installation location:

Pmin___0,4_______MPa, Pmax_____0,6_____MPa.

6. Gas temperature:

Tmin__-40___°C, Tmax_+40____°C.

7. Gas composition: (annual average gas parameters with corresponding GPU)

Carbon dioxide (CO2) __ 0.061 ____

Nitrogen (N2) __ 0.767 ______

8. Gas density under normal conditions (p) __ 0.6838 kg/m3 ______

9. Ensure transmission of data on gas flow rate, pressure and temperature using telemechanics to the unified data collection and processing system of the "Supplier" of natural gas and GRW (for consumers with a flow rate of more than 300 thousand Nm3/year), in agreement with the supplier by e-mail in the agreed format.

Data transmission shall be implemented using the following communication means:

- dedicated wired line, public telephone network line through analog modems;

- GSM cellular communication network via GSM modems ("Consumer" is provided with SIM - "Supplier" card);

- over TCP/IP-based Internet over Ethernet/RS232 (RS485).

The communication means shall provide a data rate of at least 9600 bps.

The use of these communication means for purposes other than transmitting data from the consumer gas flow calculator to the supplier is not allowed.

Automation. Gas supply. External gas pipelines

3.1 The design is based on the engineering specification.

3.2 The project provides for the creation of a system of technical accounting of natural gas;

- installation of natural gas technical metering units at natural gas consumers of ZhBZ-1 LLC in the workshops

3.3 The project has been completed in accordance with the regulatory documents:

- AVE. 50.2.0192006. "Procedure for measurement using turbine, rotary and vortex meters";

- SNiP 42012001 "Gas distribution systems";

- "Gas Accounting Rules" dated October 14, 1996. Ministry of Fuel and Energy;

- "Rules for the device of electrical installations" 7 edition Chelyabinsk. 2003.

- SNiP 3.05.0785 (from 1 1990 g) "Automation system."

3.4 The project is developed in accordance with the applicable norms, rules and standards.

3.5 Detailed drawings provide for: - installation of flow sensors on fuel gas injection pipelines in the shop of ZhBZ1 LLC;

- installation of temperature converters on fuel gas injection pipelines in the shops of ZhBZ1 LLC;

- installation of pressure sensor in fuel gas injection pipelines in the shop of ZhBZ1 LLC;

- installation of Mikont186 computer controller in natural gas technical accounting cabinets.

3.6 A total of 26 gas metering units (flow, pressure and temperature sensor) and 5 natural gas metering cabinets with a computer controller installed in them are to be installed. The distribution of technical metering units is shown in the structure diagram .

3.7 Vortex flowmeters DRG.M. used as flow measurement sensors. The grade of a particular flowmeter is selected based on the flow rate in this unit.

3.8 Thermal transducers with unified output signal of TSPU L 22361 are used as temperature sensors;

Metran 55 sensors with unified output signal are used as pressure sensors.

3.9 For recording of flow rate, pressure and temperature data, calculation of flow rate reduced to normal conditions in technical accounting cabinets install Mikont186 controllers.

3.10 GSM modems connected to the Micont186 controller via RS232 are used to collect information. In the office of the chief power engineer, it is planned to install a head modem connected to the engineer's AWS - energy, which will collect information on the technical accounting of gas.

3.11 Install flow, pressure and temperature sensors on the fuel gas pipelines, in the GRPP cabinets.

3.12 In gas consuming shops only for heating or technology, it is assumed to install a metering unit on the high side (gas pressure 0.3 MPa). In the shops consuming gas for heating and technology, it is planned to install two metering units on the low side (gas pressure 0.003 MPa). The installation of two metering units will allow to keep records independently for technological needs and heating.

3.13 Install KiA equipment in accordance with SNiP 3.05.0685 "Electrical devices," SNiP 3.05.0785 "Automation systems," RM 141195, GOST 2113075, working documentation and operational documentation for newly installed devices.

3.14 Materials and installation items for installation of routes are taken into account in the specification 2010031A.GSN-SO.

3.15 The following safety measures are provided in the detailed drawings:

Electrical equipment installed in an explosive area has the corresponding explosion protection design;

cables and wires with copper cores are provided for wiring;

- grounding of corresponding elements is provided.

3.16 Detailed drawings are developed in accordance with applicable codes, regulations and standards.

Natural Gas Metering Unit in ZhBZ-1 LLC

4.1 The project is based on:

Initial data for Gas Metering Unit design,

Typical Technical Specifications for Commercial Gas Metering Units in RB UT Bashkirgaz LLC

4.2 The project provides for the installation of a natural gas metering unit at the commissioning of ZhBZ-1 LLC

4.3 The project has been completed in accordance with the regulatory documents:

- AVE. 50.2.0192006. "Procedure for measurement using turbine, rotary and vortex meters";

- SNiP 42012001 "Gas distribution systems";

- "Gas Accounting Rules" dated October 14, 1996. Ministry of Fuel and Energy;

- Resolution of CM RB No. 278 of September 24, 2002. "On natural gas metering units in the Republic of Bashkortostan."

4.4 The project is developed in accordance with the applicable norms, rules and standards.

4.5 Working drawings provide for: - installation of flow sensor pos. FE 501 on the fuel gas pipeline in LLC ZhBZ1;

- installation of temperature converter, pos. TET 701 at the fuel gas pipeline in LLC ZhBZ1;

- installation of pressure sensor pos. RT 601 on the fuel gas pipeline in LLC ZhBZ1;

- installation of gas corrector SPG761 in the central heat station room.

Vortex flowmeter DRG.M800 D80mm is used as flow measurement sensor.

4.7 Temperature sensor used is thermal converter with unified output signal of TSPU L 22361;

Metran 150 with unified output signal is used as pressure sensor.

4.8 To record data of flow rate, pressure and temperature, calculation of the flow rate reduced to normal conditions in the room of the central heat station in the gas metering cabinet, install the corrector SPG761 item UQIR 500.

4.9 To transmit data on natural gas flow rate to the gas supplier, BashkirGaz LLC, a GSM modem is installed in the gas metering cabinet for communication via cellular communication channels.

4.10 Calculation of an error of metering station was made on PR50.2.0192006. The error of the measuring system SPG761 with DRG.M800 to the designed metering unit in all possible ranges of gas flow reduced to normal conditions does not exceed 2.0%, which meets the requirements of the RB CM Resolution No. 278 dated September 24, 2002.

4.11 Install flow, pressure and temperature sensors on the fuel gas pipeline.

4.12 Power supply of the designed KiA equipment with alternating voltage of 220 V with frequency of 50 Hz must be performed from the machine 10A installed in the existing ATS cabinet.

4.13 Lay instrumentation routes as per project sheet 4 2010031A.GSN-1.

4.14 Install KiA equipment in accordance with SNiP 3.05.0685 "Electrical devices," SNiP 3.05.0785 "Automation systems," RM 141195, GOST 2113075, working documentation and operational documentation for newly installed devices.

4.15 Materials and erection items for installation of routes are taken into account in the specification 2010031A.GSN-1-SO .

4.16 The following safety measures are provided in the detailed drawings:

electrical equipment installed in an explosive area has the corresponding explosion protection design;

cables and wires with copper cores are provided for wiring;

- grounding of corresponding elements is provided.

4.17 Detailed drawings are developed in accordance with applicable codes, regulations and standards.