mexico- frp project
DESCRIPTION
Mexico- FRP ProjectTRANSCRIPT
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By Ing. Francisco Sáinz I.
“FRP WINS THE RESPECT OF THE ENGINEERS, CONTRACTORS AND
OPERATORS AT MEXICO’S ALTAMIRA COMPLEX”
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Altamira´s Complex is formed by The Shell LNG terminal and Altamira 3,4 and 5 Power plants.
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BASIC OPERATION
• Tanker Ship arrives with liquid gas at - 160 °C.
• Storage of the LNG in double wall tanks.
• Change from LNG to NG at the ORVs using seawater as aheat source.
• Supply to the Mexico´s NG transmission where the 2 new PowerPlants are connected.
• At the Power Plant the Seawater is used to condensateexhausted steam from Turbines.
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These are believed to be the largest LNG storage tanks in the world of it´s kind.
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A view of the storage tanks and the ORV´s in process of construction
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“Drags working to prepare the new dock
for the first LNG terminal in Mexico”
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MAIN VARIABLES
• Internal Pressure: 5.4 bar (80 psi).
• External Pressure: Soil load, Traffic load, Flooded soil.Rock, Tides, Full Vacuum.
• Abrasion Particles up to 3 mm.
• Design Temperature 35 °C.
• Soil Traction.
• Settlements.
• Field Adjustments.
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A model of the intake pumps using 54” dia. FRP pipe
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“Stress analysis of the intake pumps and concrete block to
hold pipe in place”
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54” dia. mitered elbows being installed in the pump station
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Valves, pipe reducers,supports,controls under hydro test.
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26” FRP risers modeled for ORV building
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Complete ORV building with 72”
diam. underground line connected to the
26” diam. risers
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Ribs modeled to produce traction between pipe and soil(no loads allowed against ORVs)
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“Spring water coming from the trench”
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“Soil being compacted to give proper
support to the pipe”
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ORV´s risers under hydro test(8 bars)
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“The 3 amigos”
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“70 mils Abrasion Protection using Aluminum oxide “
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“Concrete box to reduce fluid velocity and sea
diffuser on the outfall area”.
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“Scale model to analize fluid behavior”
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“Finite element analysis of The special “T”
structure under different plant flows”
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“Stress concentration because of low flow(cascade) on concrete box”
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“Scale Model of Outfall Diffuser”
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“Rock Blocks to hold pipe in place for 72”diameter diffuser”
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“Diffuser under Hydro-test”
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“FRP pipe with ribs to stand 1600 kgs/m2 of rock”
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42” headers covered with rock and concrete box with sleeve at the bottom”
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“Altamira V Power plant (72” Pumps Deck)”
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“ Site Adjustments “
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“View of Cooling tower
pipe risers”
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“Pumps and Cooling Tower”
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“Obra de Toma (Make Up Water) stress analysis”
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“Obra de Toma (Make Up Water) pipe in operation (5.4 bar)”
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“Concrete Block to hold thrust displacements”
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“Condensator Pipes under hydro test”
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“Condensator pipe in operation”
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WHY FRP GAINED RESPECT.....
• Carbon Steel Not at option because of chlorides.
• High End SS High Cost.
• Concrete - Allows marine growth- Heavy increasing installation cost- Cracks at very low levels of strain
• Polyethylene - Low strength and low Modulus- Not practical to stiffen- Pipe must be Thick to withstand external loads- Field modifications and repairs really difficult
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WHY FRP GAINED RESPECT.....
• Can be reinforced against abrasion at located points with aminimun extra cost.
• Minimun marine growth• Lighter in weight than concrete or PE in this application
• Stronger and stiffer than PE
• Very easy to add hoop ring stiffeners for external loads or vacuum• Very easy to repair or modify in the field
• Correction for design errors and construction mistakes are easily accomplished.• Tolerates more deflection than concrete or high thickness PE