Leak Detection in Transmission Pipeline

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By using the AQUIS transmission pipeline Leak Detection System (LDS) from 7T, you will benefit from a solution with the following properties:

The highest capability
The most robust system
The most cost-effective to buy, install and operate

Based on more than 40 man-years of experience with leak detection and location on pipeline transmission systems, we have developed LDS; the ultimate model-based leak detection system for liquid pipelines. The system is equally well suited for pipelines carrying, for example, crude oil, refined products or water.

The capability of LDS depends on the instrumentation of the pipeline. For state-of-the-art flow meters and pressure transducers, you may consider the following key figures as guidelines:

Minimum detectable leak size: 0.5% of throughput
Location accuracy: 1-10% of distance between the flow meters, depending on leak size and flow velocity

LDS runs a dynamic real-time simulation model to generate leak responses. This means that your LDS will work under all operating conditions, including periods with starting and stopping of pumps, opening and closing of valves, etc.

The following leak responses can be generated:

Unexpected flow (UF)
Unexpecteed pressure (UP)
Net volume balance (NVB)

SOLUTION BRIEF

Transmission Pipelines

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LDS may either be embedded as a component in the SCADA system, or you may implement it as a stand-alone system with a data communication interface to the SCADA system or directly to the PLC's (Programmable Logic Controller).

Figure 1. LDS event log.

LDS Technology

LDS has a user-friendly interface enabling easy access to most modern SCADA systems.

Figure 2. LDS and SCADA intercommunication.

To ensure a robust leak detection system that uses all currently available information and is always in operation, the interface module provides you with a number of customizable options for checking incoming measurements and emulating missing or faulty data. Furthermore, you have access to straightforward configuration of the system and clear presentation of results via the comprehensive graphical user interface.

Leak alarms are stored in the LDS event log, or they may be transferred to the SCADA system by means of the LDS-SCADA intercommunication.