Enbridge Success Story

Enbridge Pipelines Inc. operates the world's longest and most sophisticated crude oil and petroleum products pipeline system. The pipeline system is approximately 13,500 kilometers (8,500 miles) long and there are more than 530 active pumping units. More than 75 unique commodity types are transported, with service provided to more than 60 different shippers.

First Flow Metering System installed at Edmonton Terminal in 1982

Flow Metering System installed in 9 sites along the pipeline from Edmonton to Griffith Indiana in 1983

First Custody Transfer System installed at Edmonton Terminal in 1990

First Model 8016 Remote Terminal Unit installed in 1998

First Unisen™ Flow Computer installed in 2010

Custody Transfer System

Problem

Enbridge Pipelines Inc. required a number of systems which were capable of accurately metering petroleum products in the pipeline. The systems were to be located at various points along the pipeline. The metering of petroleum products was done on a batch basis. The systems needed to be able to queue up several batches. Volume corrections needed to be performed based on batch composition, temperature, pressure, density and meter factor. Meter factors were to be dynamic, based on online meter proving which the systems monitored. Each system was required to be dual redundant, with the redundant computers synchronized to the millisecond.

Solution

Willowglen's dual redundant Unisen™ Flow Computer was selected by Enbridge Pipelines as being the best choice available in the industry. The Unisen™ Flow Computer features include:

Dual Redundant Custody Transfer System Accurate to the Millisecond
High Speed Terminal Support
Modbus Programmable Logic Controller (PLC) Communication Support
Multiplexed Fiber-Optic Communication
Automated Batch Processing

With the Unisen™ Flow Computer, Enbridge Pipelines has an easy to configure system with the following features:

Online Configuration
High Performance Real-Time Data Acquisition
High Precision Batch Control Accurate to the Millisecond
Dual Redundant Batch Comparison and Verification
Automated Meter Proving
Valve Control
Sophisticated Volume Corrections Based on Product Type
Capable of Monitoring up to 100 Meters
Data Trending
Integrated Automatic Ticketing