Key Takeaway
Pipeline pigging is a process that involves moving “pig” devices through pipes using air pressure for cleaning and inspecting pipelines. A common challenge in this process is overpressure, which can lead to a pig getting stuck, creating excessive pressure and the pig eventually breaking free at an unsafe velocity, leading to potential pipe damage. A Proportion-Air mass flow controller system (FQB3 and F-series) has been used to manage pig velocity, allowing for controlled airflow adjustments to prevent sudden bursts of speed that cause the pig to dislodge and create the risk of pipe damage.
Problem
Pipeline pigging is essential for maintaining pipelines, commonly used in oil, gas, and other industries. This process uses devices called “pigs” to clean, inspect, and monitor pipes. However, a significant challenge during pigging is controlling the pig’s velocity. Pressure build-up can cause pigs to become stuck, leading to dangerously high pressures that may result in the pig breaking free at an uncontrollable speed. This sudden velocity surge risks damaging the pipeline, especially in sections with curves or obstacles.
Solution
Wainbee, a Canadian supplier of industrial equipment solutions, has developed a solution for oil and gas companies to mitigate risks involved in pipeline pigging. To address pig pressure challenges, Wainbee has developed an approach using the Proportion-Air FQB3 and F-series mass flow controllers to manage pig velocity effectively. This system leverages advanced closed-loop control with a response time of less than 10 milliseconds, which allows precise, rapid adjustments to airflow. By controlling the pig’s speed, the system prevents excessive velocity when pressure builds behind an obstacle. Once the pig dislodges, the mass flow controller responds instantly to reduce airflow, maintaining a safe speed.
How It Works
The Wainbee pig velocity control system uses an F-series flow transducer to monitor air or gas flow through the pipeline. When the pig encounters an obstruction, the controller maintains pressure to dislodge it safely. As the pig breaks free, the controller detects the change in flow and adjusts instantly to prevent unsafe speeds. This closed-loop system, combined with Proportion-Air’s high-speed flow control valves, ensures a controlled, safe pigging process.
Why Proportion-Air’s Mass Flow Controllers?
Proportion-Air’s mass flow controllers are uniquely suited for this application thanks to the following advantages:
- Fast Response Time – With <10ms response time, the controller adjusts flow immediately, preventing sudden velocity surges.
- High Accuracy and Stability – The controllers maintain ±0.25% repeatability, crucial for consistent pig velocity control.
- Adaptability – These controllers handle various gases, including air, nitrogen, and carbon dioxide, making them versatile for different pigging requirements.
- Durability – Designed for industrial use, Proportion-Air controllers can withstand vibrations and tough conditions, ensuring reliable performance even in challenging environments.
Applying Wainbee’s expertly designed system with Proportion-Air’s mass flow controllers, companies are now safeguarding pipelines, reducing the risk of damage while ensuring consistent and effective maintenance.