SHERLOG

1. SHERLOG SHERLOG Sherlog SecurityPipelines II presentation

3. SHERLOG SecurityPipelines II of the Czech Secar Bohemia, a.s. company is the highest development alternative of the monitoring system, which detects and localizes leakage of the media transported from the long-distance lines with a high accuracy. SSP II evaluates , both in pumping and stillstand modes, pressures in the pipelines and indicates the following: 1/ Leakage of piping systems. 2/ Thefts by piping drilling. 3/ Pressure value anomalies worth analysis.

4. No. of cases (743) of ground water contamination in 1990 – 2004 period in New Mexico (USA) example => the second most frequent reason is formed by leakages from pipelines.

5. Emergencies and thefts on the routes

6. Consequences of emergencies and thefts on the routes

7. From the energy balance of the medium transported it results that at a fault origin and at subsequent leakage from a long-distance line the potential energy changes occur. However, the pressure changes in case of small leakages are below discrimination level of classic measuring methods. The SSP II method is based on an accurate measuring of pressure and on statistics of evaluation of pressure trends at different points of the line. The statistical procedure takes into account the dynamics of actions in a liquid or gas, changes of medium, environs, technological handling and other impacts, which influence the detection sensitivity and accuracy.

8. The SSP II system monitors operation of pipelines with liquid or gaseous media or their mixtures in a efficient and reliable way. • It detects and localises leakages of: • liquids - petrol, diesel oil, crude oil, water, ... • gases - natural gas, ethylene, ... • and their mixtures. • SSP II: • It may be combined with security systems, e.g. those of buildings and technological structures, against unauthorized entry of persons, the equipment damage and against leakage of ground water. Possibly it may be linked to other applications of the control systems. • The system may be extended also to remote control of valves and other types of technological equipment.

9. We express the sensitivity as a ratio between the piping clear diameter and actual diameter of a fault. The system adapts its sensitivity automatically to changes of conditions, including the change of medium.

10. The sensitivity to pressure course is dynamically adapted to current condition in the pipeline to eliminate the undesired false alarms. At big undulation the sensitivity decreases, at the pressure stabilization the sensitivity rises again. The superior evaluation algorithm will elaborate the entered information on piping, information on legal offtakes, etc.. The algorithm is able to differentiate the natural changes in the pipeline, i.e. outer temperature drop, change of medium properties (diesel oil <->petrol) etc. After determining that such a change had occurred the SSP II algorithm tunes itself automatically to the new conditions.

11. Accuracy of leakage point determiningis an absolute distance between the actual leakage point and the leakage location announced by SSP II (alarm). The evaluated place is always presented as an interval, in which the leakage occurred. The operators are informed on the medium leakage point with a tolerance of tens of meters order.

12. Time delaybetween the medium leakage origin and displaying of this information (alarm) at control point depends on the leakage magnitude. • The time delay varies within 0.5 to 5 minutes, typically up to 90 seconds. • The delay is given by: • Medium composition. • State of medium. • No. and locations of line stations. • Way of communication among the individual evaluation elements. • Leakage magnitude.

13. Fall-out loss of pressure measuring or line station (or even of several stations) almost will not change the sensitivity, i.e. the system ability to detect the pipeline leakage. Then the accuracy of the leakage point localisation is reduced and the system will announce a wider range of the calculated section. If a terminal (the first or the last) line station failure will occur, then the possible leakage in the terminal section of the pipeline is evaluated as an affection of the whole area from the last functional station to the end of pipeline. However, such a situation occurs scarcely since most frequently the terminal measuring points are located in the pump stations and stores area, where there is a permanent attendance. Both the main evaluation equipment and the displaying equipment may comprise several full-value workplaces. A multi-channel or multi-medial communication among the individual elements of the system ensures a security of data transfer under all circumstances.

14. Line station is located in a protective box of 400x600x200 mm dimensions. It comprises the evaluation unit (PLC) and, depending on circumstances, also a communication equipment of its own (modem, radio-modem, etc.), voltage source with a back-up battery, separators and other components. Also the pressure transmitter is included. Data transmission to dispatching centre Pressure gauge PLC evaluation unit

15. As a rule, the line stations are located in the spaces of the existing telemetric equipment. The line stations work with 220V, 50Hz power supply. Based on a requirement of the operator the power supply may be solved in an alternative way. Main evaluation unit of the dispatching centre comprises one PC and printer as a minimum and other equipment based on requirements of the operator. The unit receives data fromthe line stationsand it evaluates the operating conditions on allthe routes monitored.

17. User interface with example of leakage alarm

18. Example of pressure trends depiction

19. Communication subsystem It serves for transmission of data among the individual line stations and central systems. Concerning the requirements of the security modules, particularly those of leakage detection, the demands for the communication speed and quality are standard ones. In practice the networks of radio-modems, GPRS systems, PCM, optical links, satellite communication, etc., satisfy with a sufficient reserve. Special protective algorithms and procedures safeguard the system against incorrect interpretation of damaged or mutilated reports. The system uses a communication protocol of its own, with a possibility to include communication of alien systems.

20. SSP II and user SSP II creates the specialized modules enabling incorporation into the existing control, telemetric and information systems. A high variability of the SSP II architecture solution enables to create the applications acc. to specific requirements of the customer. The acquisition price of the SSP II is determined individually depending on the scope of the user‘s requirements and on a form of the delivery financing (capital investment, leasing, ...) As a rule the acquisition price is lower than the costs for a possible remedying of an emergency consequences. The price is reduced by a cost cut due to lower price of insurance.

21. Secar Bohemia, a.s., • ensures the following in a form of sale or leasing in cooperation with the client: • Design documentation. • Delivery and assembly of hardware • Implementation and configuration ofsoftware. • SSP II testing, putting into operation and hand-over of the to user. • Continuous passive monitoring ofoperation. • Training of the user and user‘s manuals. • Guarantee and after-guaranteeservice.

22. Thank you for your attention Contact: SECAR Bohemia, a.s. Londýnská 48 12000 Prague 2 Czech Republic Phone: +420 221 513 111 Fax: +420 221 513 108 E-mail: pipelines@secar.cz http://www.pipelines.cz