LEAK DETECTION SYSTEM

We are an established leader in pipeline leak detection with over twenty year's experience in development of quality hardware and software products Our ALDS (Acoustic Leak Detection System) is the only leak detection system with a track record guaranteed performance for the following major issues regarding leak detection, namely,

Fast detection time-ASI ALDS usually detects leak within one minute from     occurrence & dash; typically less than 30 seconds;
Accurate leak location -calculating leak location with uncertainty of 30 meters or     better.
Detecting leak with high sensitivity -able to detect small leaks,
    typically 1% or less of normal flow rate and able to detect leak with
    shut-in flow.
Applications include both liquid and gas pipelines, and consists of
    single transmission lines, networks, gathering lines, and transfer
    lines.
ALDS is also the only system with established reliable performance- very few false     alarms-which has been used not only for pipeline monitoring but also for automatic     control of shut-in valves.
Minimum maintenance requirements.
Local module based ALDS continuously detects leaks, even under
    loss off communications.

Since 1979, we have been installed and used worldwide for various applications (liquid, gas, as well as two-phase flow pipelines).
Our user list includes companies such as ABB (Russia), BEB (Germany), Chin Light Power, CPC (Taiwan), ESSO (Australia), HPCL (India), Mobil, Northwest Pipeline, Sarpon (Italy), Shell, TPC, Western Gas, etc.

System Configuration:
The Leak Detection System includes three major assemblies and associated communications links:

WaveAlert® VII Site Processor (including Transducer / Preamp assembly).
1. Data acquisition.
2. Local data analysis.
3. Built in tests.
4. Report preparation.
5. Communication.
MasterComm™ VII Node Processor.
1. Data analysis (Leak / No Leak).
2. Leak location.
3. Leak size.
4. Built in tests.
5. Communication
Host Computer with SCADA Software.
1. Communications.
2. Database organization and management.
3. System reports.
4. Graphics format.
Where database includes; scaling constants, system parameters, alarm parameters, and historic data.

The Acoustic Leak Detection System operation is illustrated herewith.

How the System Works:
Wall failure of a pipeline under pressure is a sudden event, which occurs when internal pressure produces a sudden rupture in a weakend pipe wall. When the hole forms, fluid escapes in the form of a high-pressure jet. Fluid loss produces a sudden pressure drop within pipeline, which propagates in both directions as acoustic signals with the following characteristics:

The pressure loss propagates over large distance within the pipeline
    due to low signal absorption and because the pipe walls guide the
    wave fronts.
Wave fronts propagate with the speed of sound in the fluid.
Pressure loss is detectable as low frequency acoustic signals.
Acoustic signal amplitude increases with leak size.

The WaveAlert® Acoustic Leak Detection System makes use of these characteristics to inform the operator:
  • That the leak has occurred.
  • Where the leak is located.
  • The leak is either large or small.
The Wave Alert Vll ALDS is designed to detect the occurrence and location of leak in pipeline.
On atypically Leak Detection System, the Wave Alert Vll monitors are placed at the ends of the pipeline segment and at block valve sites along the pipeline. These monitors consist of two separate assemblies- a pressure Sensor Assembly, and a WaveAlert Vll Site Processor. The Site Processors monitor the acoustic sensor outputs for transient acoustic wave created by release of fluid during rupture of the pipeline. The Site Processors perform local digital processing and upload key real-time parameters to the Master Comm Vll node processor. The Master Comm Vll node processor evaluates data from all site processors and determines if a leak has occurred, and if so, determines the location of the leak. This information is then sent to a local monitor and control system.

Our systems employ proprietary hardware for acoustic leak detection and associated hardware and software for supervising communications, structuring database, data analysis, decision-making, report and display generation and issuing alarms. Systems employ combinations of radio, fiber optic and hardwire communications with either personal, or mainframe computers for operator interface.

 
 
 
 
Communication Link:
The communication link between WaveAlert® VII Site Processors and the MasterComm™ VII Node Processor is a dedicated two-way half-duplex link. It may include radio, hardwire landline and fiber optic sections.

On the mean time, we are please to enclose herewith the data sheet which based on it we can offer you the actual detecting system.

In addition, we are ready to provide you with information that is more detailed as well as a free presentation could be done if required.

 
 
Detect Pipeline Leaks at the
Speed Of Sound
Requested By
Name
Title
Date
Company
Department
Address
City
State
Zip
Phone #
Fax #
Telex #

Name of Fluid
Pipeline I.D. (Inch)
Length (s) of Line
Down Stream Pressure (psi)
Upstream Pressure (psi)
Pressure Gradient (psi/mile)

Gas Data
Specific Gravity of the Gas
Ratio of the Specific Heats of the Gas
Average Compressibility
Viscosity (poise)
Flow (MMSCF/D)

Liquid Data
Bulk Modulus of the Liquid (psi)
Density of the Liquid (lb/cu.ft.)
Discharge Coefficient
Viscosity (poise)
Flow Barrels per Day

Other Data
Does SCADA System Already Exist?
If Yes give location of RTUs and breif of the SCADA system
Describe Type of Communications presently in place Radio Microwave Hard Wire Dedicated
Draw a Diagram of the Pipeline to Studied. Provide the following information: Location of Branches, Instrumentation Hardware, Control Room, Populated Areas & Environmentally Sensitive Areas.
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