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Pressure transmitters are used in natural gas pressure monitoring systems.

Pressure transmitters used in natural gas systems are always selected based on three core principles: safety and explosion-proof performance, high precision and stability, and the ability to adapt to harsh field environments.

Core strengths:

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1. Long-Distance Pipeline Pressure Monitoring

Function: In natural gas trunk lines and支线 spanning thousands of kilometers, pressure serves as the driving force for gas transmission. Transmitters continuously monitor pipeline pressure in real time, ensuring it operates within safe limits.

Importance: Preventing overpressure-induced pipe bursts while maintaining minimum pressure to ensure efficient transportation capacity. Data is directly uploaded to the SCADA system, enabling full-line automation and leak detection.

2. City Gate Stations and Pressure Regulation Stations

Function: Reduces upstream high-pressure natural gas to the medium or low pressure required for the city's pipeline network. The pressure transmitter plays a critical role in both control and safety monitoring in this process.

Applications:

Pressure regulator front-end monitoring: Monitoring inlet pressure.

Post-regulator monitoring: A core application! It measures the outlet pressure and feeds the signal back to the regulator or control system, creating a closed-loop control mechanism that ensures the outlet pressure remains stable at the setpoint.

Safety Cut-off: Linked with the safety shut-off valve, it activates the valve in case of abnormal pressure conditions—whether too high or too low—thereby protecting downstream users and equipment.

3. Wellhead and Gas Gathering Station

Function: Monitors the raw natural gas pressure produced from the gas well, used to evaluate well productivity and manage production operations.

4. Gas Storage Facilities (Underground Gas Storage, LNG Storage Tanks)

Function: Monitor pressure changes during the injection and withdrawal processes to ensure the safe operation of gas storage facilities.

5. Commercial, Industrial, and Residential Users

Function: After the pressure regulating cabinet in factories and buildings, monitor the user inlet pressure to ensure that gas-consuming equipment operates safely at the rated pressure.

6. Trade Handover Measurement

Function: At large user interface points (such as power plants and chemical plants), pressure is a critical parameter for calculating the standard volume or energy of natural gas. The flow calculation formulas (e.g., orifice plate flowmeter equations) include a pressure compensation term. Therefore, the pressure transmitters used here must exhibit exceptionally high accuracy and stability, as they directly impact the fairness of trade settlements—and, by extension, significant financial transactions.

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