How to Classify Gas Pressure Regulation Devices?

How to Classify Gas Pressure Regulation Devices

Gas pressure regulation devices can be divided into the following four categories based on application scenarios, pressure levels, and service objects:

1. Station and Yard Pressure Regulation Devices

Application Scenarios:
Suitable for core stations in gas systems, such as gas sources, gate stations, storage and distribution stations, gas distribution stations, vaporization stations, mixing stations, and gas filling stations.

Characteristics:

• Pressure Level: Higher inlet and outlet pressures, matching the process requirements of stations (e.g., high-pressure inlet, medium-pressure outlet).
• Installation Method: Can be installed outdoors or indoors, considering environmental conditions (e.g., explosion-proof, rainproof).
• Functional Configuration: Typically equipped with metering devices to accurately count gas flow in and out of stations.
• Typical Scenarios: Pressure regulation and metering systems in LNG receiving stations, pressure reduction devices in CNG gas filling stations, etc.

2. Network Pressure Regulation Devices

Application Scenarios:
Used for pressure conversion in various pipelines of the gas transmission and distribution network to ensure matching of system pressure classes (e.g., high pressure → medium pressure, medium pressure → low pressure).

Classification and Characteristics:

(1) Network Connection Pressure Regulation Devices

• Pressure Characteristics: Outlet pressure is medium pressure or higher (e.g., sub-high pressure A: 0.4–0.8 MPa).
• Pipeline Characteristics: Not directly connected to end-users; mainly used for pressure connection between pipeline tiers (e.g., connection between high-pressure and medium-pressure pipelines).
• Installation Requirements: Must be installed in dedicated buildings to ensure tightness and safety.

(2) Regional Pressure Regulation Devices

• Pressure Characteristics: Outlet pressure is low pressure (e.g., ≤ 0.01 MPa).
• Pipeline Characteristics: Directly connected to a large number of end-users (e.g., residential communities, commercial complexes), responsible for gas distribution within the region.
• Typical Forms: Building pressure regulation boxes, small-scale pressure regulation stations, usually installed in courtyards or on the exterior walls of buildings.

3. Dedicated Pressure Regulation Devices

Application Scenarios:
Independent gas supply systems for industrial users (e.g., factories, boiler rooms) or large commercial users (e.g., hotels, catering clusters).

Characteristics:

• Metering Requirements: Must be equipped with metering devices for trade settlement (e.g., Roots flowmeters, turbine flowmeters).
• Installation Flexibility:
  • Can be installed outdoors (e.g., open-air industrial areas);
  • Can be installed in separate single-story buildings or single-story buildings adjacent to gas-using buildings;
  • Small-scale devices can be integrated into pressure regulation cabinets/boxes (e.g., skid-mounted pressure regulation devices).
• Pressure Adaptability: Inlet pressure can cover medium-high to low pressure, customized according to users’ equipment requirements.
• Typical Cases: High-pressure gas pressure regulation stations in ceramic factories, dedicated pressure regulation and metering skids in large hotels.

4. User Pressure Regulation Devices

Application Scenarios:
Directly serving residential users to achieve "last mile" pressure regulation.

Classification and Characteristics:

(1) Single-Household Pressure Regulation Devices

• Installation Location: Close to gas appliances (e.g., beside kitchen gas stoves).
• Pressure Characteristics: Relatively high inlet pressure (e.g., medium pressure into households), requiring reduction to low pressure (2000–3000 Pa) via small-scale pressure regulators.
• Safety Measures: Equipped with overcurrent cut-off valves and leakage alarms to ensure indoor safety.

(2) Multi-Household Pressure Regulation Devices

• Service Scope: One or several residential buildings (e.g., community apartment buildings).
• Installation Form: Metal pressure regulation boxes hung on the exterior walls of buildings or independent pressure regulation cabinets set in courtyards.
• Advantages: Centralized pressure regulation reduces indoor equipment hazards and facilitates unified maintenance and management.

Summary: Core Dimensions of Classification

Through the above classification, the technical requirements and application scenarios of different pressure regulation devices can be clearly defined, facilitating system design, equipment selection, and operation and maintenance management.

Information Source: http://www.ccgas.net