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WELCOME TO PRESENTATIONONGSPL GAS GRID(Gujarat Natural Gas Infrastructure) 6th May 2006
GSPL Scenario Need of Pipelines Demand and Supply Gas Technical details of Pipeline Pipeline construction photographs Pricing Mythology / costing Challenges / Issues Question & Answers Topics Covered
GSPL AT A GLANCE Gujarat State Petronet Limited was setup on 23rd December, 1998 for transportation of Natural Gas throughout the state. The major features are as follows:- Prime Objective of GSPL is connecting all the available sources to demand centres. Open Access: GSPL is the first pipeline company in India operating on open access basis and is a pure transmission network.
GSPL has successfully commissioned 58 KM of Pipeline by 2001 and 480 KM of pipeline till date. GSPL is currently transporting 13 MMSCMD of Gas. GSPL’s revenue grew at a compound annual growth rate of 50.1% between Fiscal Year 2003 and Fiscal Year 2005. GSPL operations and maintenance systems and procedures have been certified with ISO 9001:2000 quality standards by M/s DNV. GSPL ACHIEVEMENTS
Natural Gas can be transported through pipelines or by tankers in liquefied form. • Advantages of transporting natural gas through pipelines vis-a-vis transportation by tankers. • Safe – since transported through underground pipeline, not exposed to nature. • Cheap – Cheaper than transportation by tankers. • Effective – No disruptions due to man or nature. • Efficient – No losses in transportation, handling, etc. Why Pipelines ?
Natural Gas is a fossil fuel in the gaseous form. Methane is its basic constituents. Primary Users of Natural Gas as a fuel:- Power Sector Refinery Fertilizer Industry Domestic cooking and heating What is Natural Gas ?
Energy Demand In India • Energy demand growth of 4% • Gas demand growth of 6% • Large demand of Natural Gas. • Meeting demand through mix of options
India’s Potential Demand Estimates In India the demand for Natural Gas is going to increase from 9% to 23% in the next 25 years. Source: Hydrocarbon Vision 2025
Demand Supply Gap of Natural Gas (Indian Scenario)
Why? For establishing the capacity of pipeline. Suggestions for enhancing the capacity of existing grid. Effect of new / future pipeline on the existing grid. Results Provides detailed throughput capacity of entire pipeline grid for various scenarios. Suggests requirement of necessary loop lines, compressors, etc. Provides capital costs and operating costs for various scenarios. Simulation
Codes and Standards The following Codes/ Standards are Referred for Pipeline Design: • ASME B 31.8 • OISD 141 • ASME B 31.3 • API 1104 • ASME SEC II PART “C” • ASME SEC V • ASME SEC IX • API RP 1102 • API RP 1109 • DIN 30672 • SIS 055900 • APL 5L • NACE RP 02 75 • NACE RP 06 75 • API 6D • DNV RULES 2000 • ANSI, ASTM SPEC. ETC.
Pipeline Design DESIGN PARAMETERS: • Pressure – 95 Barg • Temperature - -20ºC to +60ºC 3. Design Life- 40 Years • Standard / Code – ASME B31.8 / OISD- 14.1
Permission to Lay Pipeline Application for Permission for laying the pipeline MOPNG TRANSPORTER If Approved. IF, QUERY ? State Govt. Application for Appointment of C.A. TRANSPORTER IF, QUERY ? If Approved. MOPNG APPROVED
Procedure Reconnaissance & Route Survey. Finalization of Route. Final Route Survey. Preparation of Alignment Sheets. Preparation of 3(1) Schedule. Submission of 3(1) Notification to MOPNG. Publication of 3(1) Notification to Government Gazette. Notice to Land Owners. Submission of 6(1) Notification to MOPNG. Publication of 6(1) Notification to Government Gazette. Notice to Land Owners for Land Acquisition. Taking Possession and laying the Pipeline. Restoration / Return. ROU / ROW Clearances
Route Survey Grading Stringing Welding and NDT Joint Coating Trenching Lowering Crossing of Road, Canals, Railway Backfilling Cleaning, Hydrotesting, Drying, Gas Charging Construction Activities of Cross Country GasPipeline
WELDING STANDARDS: API 1104, ASME SEC: II PART C, SEC.-V, SEC.-IX Main Line Joints Tie-In Joints Internal Clamp External Clamp Root- Up Hill Root - Down Hill Hot & F/c Down Hill Hot & F/c Down Hill 100% X ray 100% X-ray + U.T Repairs All Pass- Up Hill 100% X-ray after repair + U.T. Note: 0.1% of total joints shall be cut for P.T
Standards Type of Sleeve Thickness Surface Preparation Roughness Strength Test Holiday Test :: DIN 30672 :: SIS 055900 :: Heat Shrinkable Sleeves :: 2.2 mm thickness after shrinkage and 50 mm over lap on existing Coating. :: SA 2 ½ :: 60-80 Microns :: By peel off Test, frequency 1 in 50 Joints :: 25 K.V Field Joint Coating
Each section shall be cleaned by using Batch Pigs with the help of compressed air. The following are the sequence of pigs for cleaning: 1) Cleaning pig with spring loaded brushes 2) Cleaning pig with air jet holes, nozzles to clean internal dust. 3) Batching pig with four cups to remove mud, dirt debris and any other material. 4) Gauging pig with Aluminum Plate of 95% thicker wall pipe internal dia and thickness of plate is 6.35 m.m. Note: Pig locator shall be used during pigging. Air Pigging
Standard: ASME B 31.8 Water source to be identified at site during construction. Contractor shall submit laboratory test report of water to be used for testing. Dosing rate of corrosion inhibitor shall be decided after testing the water samples at suitable source. Test pressure shall be 1.4 Times of DP (95 Kg/cm2) Air Volume by P-V plot at 30% of test pressure Strength Test for 24 hrs. Tightness Test (Leak Proof Test) 24 hours Acceptance of test as per calculation shown in Bid Document. Dewatering shall take place in such a way that the composition of effluent water does not exceed the limit set in IS: 2490 (Part-1) tolerance limits for Industrial effluent discharge into surface water. Chlorinator shall be included in dewatering circuit Hydro-testing
Foam Pig are propelled with compressed air to remove the residual water. After Successful completion of swabbing the line shall be propelled with foam pigs by using Dry Air from Drying Unit Drying Operation shall be acceptable after checking the dew point temperature at both ends and Min(-) 20 Degree Centigrade shall be achieved. A digital dew point meter shall be used for checking the dryness of the line. SWABBING / DRYING
C.P System is provided to protect the pipeline from corrosion. Type of C.P System : Impressed Current Cathodic Production Design Life : 40 Years Type of Anodes : Magnesium Zinc High Silicon Cast Iron (Low Consumption Rate) The pipe to soil potential shall be in between (-) 0.85V to (-) 1.5 V with reference to copper / copper sulfate, Ref. Cell. TR Units at Stations Test Stations at every 1000 Mtrs.and all crossings and all crossings. C.P SYSTEM
Pipeline Construction Photographs
Postage Stamp Pricing system: Constant toll independent of distance. Distance related or Point to Point System: Toll is Proportionate to the distance of the delivery. Pricing Methods for Gas Transportation
Cost of a Pipeline Thumb-rule for costing:-
Thumb Rule for Costing Approximate cost of pipeline per kilometer length typically are as follows:
The pipeline has a life of 40 years. Feasibility Check to be done to see whether revenue generated are enough to cover operating expenditure, depreciation, interests and return on Equity. Pipeline projects are capital incentive with Debt : Equity ratio of 65 : 35. Pipeline has very low operating costs, generally 2% to 2.5% of the Capex. Financial Viability
Transmission:- G.S.P.L G.A.I.L. G.G.C.L Reliance Distribution:- G.S.P.C Gas G.G.C.L Adani Charotar Gas Indraprastha Gas Assam Gas Company. Mahanagar Gas Company Companies in Gas Transmission and Distribution
Challenges • How to avoid duplication • How to optimize the infrastructure
Safety Quality Std. Regulatory Issues Issues:-