Gas Metering Units: Key Standards and Requirements

Gas metering units are an integral part of gas distribution systems, ensuring accurate measurement of consumed gas volumes. Proper design of such units is essential for ensuring safety, efficiency, and compliance with regulatory norms. In Ukraine, the main requirements for designing gas systems and metering units are governed by the State Building Codes (DBN), which standardize and ensure the safe operation of equipment.

In this article, we will examine the key DBN norms that must be followed when designing gas metering units and the main requirements for these systems.

What is a Gas Metering Unit?

A gas metering unit is a specialized system comprising equipment for measuring natural gas volumes. The main components of a metering unit include:

Gas meters.
Pressure regulators.
Filters for gas purification.
Gas pipelines and connecting elements.

These systems are installed both in residential properties (e.g., private homes) and industrial enterprises.

Key DBN Standards for Designing Gas Metering Units

Adherence to DBN standards is mandatory when designing gas metering units. The key provisions are outlined in the following documents:

DBN V.2.5-20:2018 "Gas Supply" – the fundamental document for gas system design.
DSTU EN 12279 – the European standard regulating technical requirements for natural gas metering systems.

1. Selecting a Location for the Gas Metering Unit

The gas metering unit must be located in an accessible place for maintenance and inspection.
Equipment installation is prohibited in areas with high humidity, poor ventilation, or near fire sources.
For external installations, the unit must be protected from weather conditions.

2. Safety and Ventilation

Premises housing gas metering units must have natural or forced ventilation.
The minimum distance between the metering unit and open flame sources must comply with DBN V.2.5-20 requirements.
Emergency valves for automatic gas supply shut-off in case of leakage are mandatory.

3. Technical Requirements for Gas Meters

Meters must meet the accuracy class specified in DSTU EN 1359.
For residential use, mechanical or diaphragm meters are typically used.
Industrial gas meters must accommodate large volumes under high pressure.

4. Gas Filtration and Purification

A filter for purifying gas from dust and other impurities must be installed before the gas metering unit.
Filtering elements must comply with standards regarding throughput capacity and purification efficiency.

5. Capacity Calculation

The throughput capacity of the gas metering unit must match the calculated consumption volume.
Designers must consider peak loads that may occur during maximum gas consumption.

6. Materials and Components

All materials used in gas metering units must be corrosion-resistant and comply with technical standards.
Pipelines and connecting elements must be made from certified materials in accordance with DBN and DSTU.

7. Damage Protection

For gas metering units installed in open spaces, protective casings or cabinets must be provided.
The design must ensure protection from mechanical damage and weather conditions.

8. Automation Requirements

Industrial gas metering units must include automatic data reading systems.
Integration with automated management systems for remote monitoring is recommended.

Responsibility for DBN Compliance

1. Designers

Project organizations are responsible for ensuring compliance with DBN standards. If violations are found, they may be required to make corrections at their own expense.

2. Clients

Clients who attempt to cut costs by using cheaper materials or components may also bear responsibility for the consequences of non-compliance.

3. Regulatory Bodies

Organizations that oversee project reviews must ensure compliance with all requirements.

Conclusion

The design of gas metering units is a crucial stage in creating a safe and efficient gas supply system. Compliance with DBN norms ensures the reliability of equipment, measurement accuracy, and consumer safety.

Our company provides professional design services for gas metering units, strictly adhering to current norms and standards. Contact us for a consultation or to order a reliable design for your project.