Gas Flow Metering Skid

A gas flowmetering skid is a pre-engineered and pre-assembled unit designed to measure the flow rate and other properties of natural gas or other industrial gases. It typically houses all the necessary components for accurate and reliable gas flow measurement within a compact, modular package. Here's a breakdown of the key details and specifications to consider:

Components:

· Flow Meter: The heart of the skid, responsible for measuring the gas flow rate. Common types include:

o Positive Displacement (PD) Meters: Accurate for various gases, good repeatability.

o Coriolis Mass Flow Meters: High accuracy for various gases, measures mass flow rate directly.

o Ultrasonic Flow Meters: Non-invasive, handles gases with entrained particles.

o Turbine Flow Meters: Suitable for clean, less dense gases. (Selection depends on gas type, accuracy requirements, and other factors)

· Pressure Regulators: Maintain a constant pressure at the flow meter for accurate measurement.

· Temperature Sensor: Measures gas temperature for flow rate correction and additional calculations (often integrated with the flow meter).

· Pressure Transmitters: Convert gas pressure into an electrical signal for monitoring and recording.

· Flow Computer (Optional): Calculates gas volume or mass flow rate based on meter readings, temperature, and pressure data. May also provide additional features like data logging and alarming.

· Isolation Valves: Allow isolating the flowmeter for maintenance or calibration without interrupting the main gas flow.

· Filters: Remove impurities from the gas stream to protect the flow meter and other instruments.

· Piping and Instrumentation: Connecting all components with proper valves, gauges, and safety features.

· Skid Structure: A sturdy frame that houses and protects all the components, often made from weatherproof steel.

Specifications:

· Gas Type: The specific gas the skid is designed to measure (e.g., natural gas, compressed air, nitrogen).

· Flow Rate Range: The range of flow rates the skid can accurately measure.

· Accuracy: Expressed as a percentage of reading (% of reading) or reading plus/minus a fixed value. Typical accuracy for good quality skids is ±0.5% to ±2% of reading.

· Pressure Rating: The maximum pressure the skid and its components can withstand.

· Temperature Rating: The range of temperatures the skid can function within.

· Output Signal: The electrical signal generated by the skid, typically a 4-20mA current loop or 0-10V voltage signal representing flow rate or other parameters.

· Control System (Optional): Skids can be integrated with a control system for remote monitoring, data logging, and control of valves or other equipment.

· Safety Features: Skids typically include pressure relief valves, leak detection systems, and other safety features to ensure safe operation.

Benefits of Gas Flowmetering Skids:

· Pre-engineered and Pre-assembled: Saves time and engineering costs compared to building a system from scratch.

· Compact and Modular: Easy to transport, install, and commission.

· Accurate Measurement: Provides reliable flow rate data for custody transfer, process control, and optimization.

· Weatherproof and Rugged: Designed for harsh outdoor environments.

· Safety Features: Offers built-in safety measures for personnel and equipment protection.