Metering Function

Accurate gas measurement is essential for custody transfer between producers, processors, and pipeline operators establishing commercial value. Metering skids measure volumetric or mass flow with corrections for pressure, temperature, and gas composition converting to standard conditions. Typical accuracy ±0.5-1.0% meets API, AGA, and international custody transfer standards.

System Components

Complete skids include ultrasonic, turbine, or orifice flow meters depending on accuracy and range requirements, flow computer calculating corrected volumes, pressure and temperature transmitters for compensation, gas chromatograph or density meter for composition analysis, upstream filtration protecting meters from particulates, isolation and bypass valving, and instrumentation panel. Factory-assembled packages arrive tested minimizing field installation.

Meter Technology

Ultrasonic meters provide bidirectional measurement with no moving parts and wide turndown ratios ideal for varying flows. Turbine meters offer proven accuracy for steady flow applications. Orifice plates provide economical measurement for standard conditions. Coriolis meters measure mass flow directly. ERGIL selects technology based on flow range, accuracy requirements, and application conditions.

Applications

Production wellhead metering, gas gathering allocation, pipeline custody transfer stations, gas processing plant inlet/outlet measurement, fuel gas consumption monitoring, and flare gas measurement. Serves flow rates 0.1-200 MMSCFD with operating pressures 100-1500 psig across upstream production, midstream transmission, and distribution operations.

Data Management

Flow computers store measurement data with time-stamped records for reconciliation and reporting. Communication protocols include Modbus, OPC, and proprietary systems integrating with SCADA. Remote monitoring enables real-time flow tracking. Data archives support regulatory reporting and commercial settlements.

Design Standards

Metering per API 14.3, AGA Reports, ISO 5167, and applicable pipeline tariff requirements. Meter runs with straight pipe requirements upstream and downstream ensuring flow profile development. Materials suitable for gas composition including sour service. Explosion-proof electrical systems for hazardous classification.

Performance Features

High accuracy ensures fair commercial measurement. Wide turndown accommodates varying production rates. Redundant measurement capability for critical applications. Temperature-controlled enclosures maintain instrument performance. Proven technology with extensive custody transfer application.

Construction Standards

Skids designed per ASME B31.3 process piping. Structural steel supports for equipment loads. Weather-protected enclosures for outdoor installations. Complete documentation with calibration certificates, proving reports, and as-built drawings supporting custody transfer validation.

ERGIL gas metering skids deliver accurate reliable flow measurement ensuring fair commercial transactions and regulatory compliance in natural gas operations.