Final Project Presentation
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1) The document presents a pipeline construction project in Bangladesh that involves constructing an 8-inch diameter pipeline over 10 km from Pirojpur to Rashidpur and a 6-inch diameter pipeline over 15 km from Rashidpur to Tajpur, as well as constructing metering and regulation stations. 2) It discusses the objectives, methodology, and major steps of the pipeline construction process, which includes equipment selection, clearing and grading the right-of-way, stringing and welding pipes, testing and coating, trenching, hydrostatic testing, and commissioning. 3) It also analyzes the feasibility of the project, finding that the benefit-cost ratio and internal rate of return meet the
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Final Project Presentation
- 2. Project Title Pipeline Construction and Network Analysis for Transporting Petroleum in Jalalabad Gas Transmission & Distribution System Limited Department of Petroleum & Mining Engineering Jessore University of Science & Technology Supervised By Md. Minhaj Uddin Monir Asst. Professor Presented By Gazi Mahade Hasan Roll No: 090801 Session: 2009-2010
- 3. INTRODUCTION Jalalabad Gas Transmission & Distribution System Limited (JGTDSL) is one of the leading gas transmission companies in Bangladesh JGTDSL has 455.918 km Transmission Pipeline, 1322.603 km Distribution Pipeline, 1059.995 km Feeder & Service Line and other 692.397 km Consumer Made pipeline. Daily gas sales of JGTDSL are 220 mmscfd. The present study is about the Construction of 8" 淡 145 (賊4) psig 10 km pipeline from Pirojpur to Rashidpur & 6"淡 145 (賊4) psig 15 km pipeline from Rashidpur to Tajpur and Construction of Rashidpur & Tajpur DRS in Biswanath Upazilla, Sylhet.
- 4. Location of the Study Area Biswanath upazilla lies in Sylhet district some 20 km away from Sylhet and 225 km from Dhaka. The area of this upazilla is 214.50 sq. km and located in between 24属44卒 and 24属56卒 north latitudes and in between 91属39卒 and 91属50卒 east longitudes
- 5. Objectives of Study To understand the pipeline construction process. To determine the gas flow through pipe. To observe the flow control and regulating system. To observe the valve and metering station. To analyze the network of pipeline. To determine the official formalities for pipeline construction. To determine the risks of pipeline construction site To determine the testing procedures of pipeline.
- 6. Materials The following materials are used for pipeline construction work Materials For construction Bulldozer Excavator Side boom Crane Welding generator Chain Dozer Holiday Detector Clamp De-watering pump Trailer/ Truck Hydrostatic Testing pump For Metering & Regulation Station Insulating Joint Ball Valves Glove Valve Slum Shut-off Valve Relief Valve Filter Separator Electronic Odorizer Turbine Meter Gas Pressure Reducing Regulator Software Auto CAD 2007 Paint.NET v3.5.10 Pipe Flow Expert v5.12
- 7. Methodology Pipeline Design Many intricacies are involved in designing a modern pipeline system. Amount of FLOW that must flow through the pipeline is one of the first items of information required. BUT Economic and Financial Feasibility are difficult to estimate.
- 8. Working Flow Chart Pipeline Construction Work Pre-construction Surveying Construction Plan PDPP Land Acquisition & Requisition Invitation for Tender Contact Award Procurement Pipeline Design Feasibility Study Market Survey ROW Selection Cost Estimation Pressure Calculation Pipe Specification Construction Equipment selection Cleaning the ROW Stringing the Pipe along ROW Welding the Pipe Joints Together NDT of Welding Joints Coating & Wrapping Ditching / Trenching Crossing Holiday Test Lowering & Backfilling Pigging Hydrostatic Test Pipeline Drying Pipeline Commissioning DRS Construction Gas Network Simulation and Analysis Layout of Design
- 9. Layout of Designs The following designs are the base of this construction work. - Right of Way (ROW) of Pirojpur to Tajpur - Pirojpur DRS - Rashidpur DRS - Tajpur DRS
- 10. ROW of Pirojpur to Tajpur
- 11. Pirojpur DRS
- 12. Rashidpur DRS
- 13. Tajpur DRS
- 14. Result and Discussion Project Feasibility Study The feasibility study is an evaluation and analysis of the potential of a proposed project which is based on extensive investigation and research to support the process of decision making. Project is feasible when, - Internal Rate of Return (IRR) > 15% - Net Present Value (NPV) is Positive - Benefit Cost Ratio (BCR) > 1 In Pirojpur to Tajpur Pipeline Construction Project, BCR (Financial) = 1.04 BCR (Economic) = 1.50 IRR (Financial) = 16.68 % IRR (Economic) = 25.91 % NPV = (+) So the project is both financially and economically feasible.
- 15. Major steps for pipeline Construction Equipment Selection It is one of the most important steps in pipeline construction works. These equipments must be selected as per design requirement. The selected equipments should be cost effective and efficient in work.
- 16. ROW Clearing And Grading ROW is cleared of barriers and graded for movement of construction equipment, materials and ultimately construction of pipeline. Bulldozer & Excavator is used to clearing & grading of ROW
- 17. Stringing the Pipe Along ROW Stringing is aligning the pipe along the ROW. It is done using share leg.
- 18. Welding Operation Welding is a fabrication or sculptural process that joins materials, usually metals or thermoplastics, by causing coalescence.
- 19. NDT of Welding Joints Non-destructive testing (NDT) is the use of noninvasive techniques to determine the integrity of a material, component or structure or quantitatively measure some characteristic of an object. i.e. Inspect or measure without doing harm.
- 20. Coating and Wrapping of pipes After welding and cleaning the upper surface of pipe the, the whole pipe is coated with a chemical called primer. Then it is wrapped with tape.
- 21. Trenching Operation A trench, or ditch, must be dug to allow the pipe to bury the pipe. It is usually made to one side of the center of the ROW.
- 22. Canal Crossing Crossing is required when canal or river exist on the way of pipeline route. Here a concrete support is used to protect the pipe from water flow. This concrete support is called RCC. It is made by the following ratio of rod, cement and concrete Rod : Concrete : Cement = 1:2:4
- 23. Holiday Test Holiday test is one of the non-destructive test method applied on protective coatings to detect unacceptable discontinuities such as pinholes and voids. Basically two types of holiday detectors are used which are following Low-voltage holiday detector High-voltage holiday detector
- 24. Pigging Pigging is a maintenance operation of pipeline which includes cleaning and inspecting the line. This operation is done by using devices known as pigs. This is accomplished by inserting the pig into a pig launcher and receiving it in pig receiver.
- 25. Hydrostatic Test A hydrostatic test is performed to determine the integrity and soundness of pressure vessels and piping joints. It is done after pigging.
- 26. Pipeline Drying Prior to the commissioning the pipeline should be dry up. Attaining the correct dryness level can help inhibit microbiologically influenced corrosion (MIC), hydrates and other issues. This operation is done by foam pig launching through the pipe.
- 27. Lowering and Backfilling Pipe joint is lowered to the trench using sideboom. After laying the pipe in the trench or ditch, it is filled by the overburden which is called backfilling.
- 28. Pipeline Commissioning Commissioning involves injecting natural gas into the pipeline. The commissioning plan contains the sequence of measures together with the safety precautions to be adhered to. Gassing-up with inert gas (nitrogen) is necessary in the event of immediate tie-in into natural gas network in order to maintain a slight gauge pressure inside the pipeline as opposed to atmospheric pressure until the pipeline can be finally tied into the network.
- 29. Gas Network Simulation and Analysis Gas networks simulation or Gas Pipeline Simulation is a process of defining the mathematical model of the gas transport and distribution systems, which are usually composed of highly integrated pipe network operating over a wide range of pressures. Simulation allows to predict the behavior of gas network systems under different conditions. Such predictions can be effectively used to guide decisions regarding the design and operation of the real system.
- 30. Simulation Model Development A model is similar to but simpler than the system it represents. Model represents the characteristics or behavior of the real-world or system. It should not be complex.
- 31. Conclusion and Recommendation Conventional pipeline construction methods are generally followed in Bangladesh. Some analytical methods can be applied with these conventional methods for appropriate construction work such as General Analyses - Ring Stability - Maximum and Minimum Height of Cover - Allowable Ring Deflection - Backfill and Embedment Specifications Longitudinal Analysis - Thrust Restraint - Longitudinal Contraction - Beam Action - Longitudinal Stress Analysis.
- 32. Contd. Specific Analyses - Pertinent Variables - Performance Limits - Design for Internal Pressure - Soil Mechanics - Ring Stability - External Pressures and Loads - Pipe Mechanics
- 33. Thank You