Compressed Natural Gas CNG pressure reduction systems play a crucial role in regulating gas pressure from high levels to safe levels before use in equipment and production lines. Regular maintenance and repair not only ensure stable system operation but also guarantee safety, save costs, and extend equipment lifespan.

CNG (Compressed Natural Gas) is compressed natural gas extracted from natural gas fields or as associated gas during oil extraction. It undergoes purification to remove impurities and heavy components, then is transported via pipelines to a gas compression plant or directly compressed into CNG tankers. The natural gas is compressed to a pressure of 200-250 bar at ambient temperature to reduce storage tank volume, increase efficiency, and lower transportation costs via road, rail, and water.

Why is regular maintenance of CNG pressure reduction systems necessary?

  •  Prevents gas leaks, reducing the risk of fire and explosion.

  •  Ensures stable output pressure that meets technical standards.

  •  Minimizes unexpected breakdowns, avoiding production interruptions.

  •  Reduces major repair and equipment replacement costs.

Service and Maintenance Scope

We provide comprehensive services for CNG pressure reducing systems, including:

  • Overall inspection of the station and pressure reducing unit

  • Cleaning and calibration of primary and secondary pressure reducing valves

  • Inspection and replacement of valve diaphragms, seals, and gaskets

  • Assessment of the accuracy of pressure gauges and sensors

  • Addressing gas leaks, vibrations, and unstable pressure reduction

  • Repair or replacement of damaged components

  • Testing, calibration, and acceptance of the system after maintenance

REAL PHOTOS

Service process

■ Conduct a general inspection of the CNG station foundation, fences, and signs of corrosion;
■ Check the safety signs around the substation; inspect the electrical cabinet
■ Inspect the power distribution cabinet and control panel
■ Inspect the water heater pump; Inspect the heating element (resistance); Inspect the operation of the solenoid valve
■ Check the operation of the electrode probe (water level indicator); Check the boiler's backup water tank
■ Check the female connector and coupling wire; Check the pressure gauge on the charging column; Check the coupling wire support; Check the grounding clamp
■ Check the emergency shut-off system, check the filter; first-stage pressure regulating valve; second-stage pressure regulating valve
■ Check for leaks in pipes and joints; check the pressure and temperature gauges on the system (mechanical);
■ Check the tightening torque at the high-pressure tube connections; check the nitrogen gas cylinder pressure.
■ Check the inspection validity period of the equipment
■ Calibrating metering devices

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