1. 169 South Main Street, New City, NY 10956
169 South Main Street, New City, NY 10956
TEL:

2. GSL LEAK DETECTION SYSTEM OVERVIEW AND PERFORMANCE

3. Overview of GSL Leak Detection
The QuickAlert® Leak Detection System (GSL LDS) is designed to detect the occurrence and determine the location of leaks in gas, liquid, and multiphase flow pipelines.
1. At the instant of a break in the pipe wall a transient acoustic wave is created.
2. This acoustic wave travels at the speed of sound for that fluid guided by the walls of the pipe in both directions from the source of the break.
3. The acoustic wave is detected by sensitive acoustic sensors and analyzed by QuickAlert Site Processors situated along the pipeline.
4. After further analysis by the GSL MASTER, the location of the leak is determined from the arrival times of the expansion waves at the sensor locations.
LEAK
GSL Master
EVENT
EVENT
QuickAlert
QuickAlert

4. Leak Location S = D/2 + 1/2(t1 - t2)V
By using time synchronization provided by GPS satellite,
the QuickAlert GSL LDS will locate leaks very precisely.
S = D/2 + 1/2(t1 - t2)V
S = Leak Location D = Distance Between Sensors t1 & t2 = Time of arrival at Sensors V = Sound Velocity in Pipeline Media
Sources of Location Uncertainty: t1,t2 & V
With GPS => only uncertainty from V
Detection Time: D/V + 2*N
N = Polling Time

5. QuickAlert GSL LDS ON-LINE REAL-TIME LEAK DETECTION SYSTEMS
QUICK Detect Leak at the Speed of Sound
SENSITIVE Detect Small size leak
PRECISE Determine the Leak Location (Especially for underground pipe)
RELIABLE Detect Leaks under All Operating Conditions with Minimum False Alarm Rate (Steady State, Transients- pump start, valve closing, shut in flow...)
Easy to Use (Minimum Maintenance & Calibration, work with lost of communication)

6. QuickAlert GSL LDS TYPICAL PERFORMANCE
 Quickest leak detection - detect and locate leaks within 60 seconds
Most accurate leak location - locate leaks within 40 meters
Low false alarm rate – typically less than one false alarm per year
High sensitivity – detects small leaks
Detects leak with or without flow
 Detects leak during lost of communication or communication faults

7. GSL LEAK DETECTION SYSTEM
COMPONENTS

8. Acoustic Sensor
Easy installation, similar to standard pressure sensors
Supplied in explosion proof enclosure (other enclosures optional)
Standard 4-20 ma output
Robust, high reliability, designed for oil and gas industry use.
Meets all common industrial standards
Fast response time
Low maintenance
Easy replacement

9. QuickAlert VIII Site Processor
Installation similar to standard RTU
Standard input / outputs including 4-20 ma, RS-232, dry contact relays, optically isolated inputs
Robust, high reliability, industrial temperature design for in oil and gas industry
Low maintenance
Easy installation
Easy replacement

10. GSL MASTER Node Processor
Installation similar to standard RTU
Standard RS-232, dry contact relays, optically isolated inputs
Robust, high reliability, industrial temperature design for in oil and gas industry
Low maintenance
Easy installation
Easy replacement

11. GPS Synchronization Includes Trimble receiver and antenna
Simple ¾ NPT inch pole mount
Weather tight marine environment antenna
Must be installed with minimum 60 degree view of sky

13. GSL Leak Computer User / Operator interface to the QuickAlert GSL LDS
Supplied with pre-configured GE/Fanuc HMI / SCADA

14. GSL LEAK DETECTION SYSTEM
CONFIGURATION

18. GSL LEAK DETECTION SYSTEM
INTERFACE

19. OPERATOR SCREEN

20. DATA SCREEN

21. LEAK HISTORY SCREEN

22. TENDENCES SCREEN

23. GSL LEAK DETECTION SYSTEM
UNIQUE FEATURES

24. Unique Features of GSL Leak Detection Systems (GSL LDS)
Transient Conditions  A system (with proven records) which can operate under transient conditions Unique finger print matching approach allows for leak detection under transient conditions
Communication Failure  A system (with proven records) which can continuously detect leaks with communication failure and /or lost of power to certain locations
Operation Conditions  A system (with proven records) which can detect leaks under all operation conditions (steady state, transient, and shut-in flow conditions)
Ease of Use  A system (with proven records) which is extremely easy to use, does NOT require operator/engineer intervention
Minimum Maintenance A system (with proven records) which does not require accurate or repeatable measurement. Requires minimum maintenance.