Ship To Ship Lng Transfer Technology by 3GlV0g

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									Ship to Ship LNG Transfer
       Technology
Excelsior Class EBRV
            138,000 m3




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  LNG STS Transfer
Double Banked at Anchor




                      3
                                                                  LNG STS Configurations

                                                                                        LNG transferred across dock from LNG Carrier
LNG transferred from LNG Carrier to EBRV down the dock
                                                                                    Gas Delivered from EBRV to facility via HP Gas Arm
  Gas Delivered from EBRV to facility via HP Gas Arm



                                                                                               LNG



                                                                                                                           Gas
                                              LNG

               Gas




                                        LNG Transferred via Ship to Ship Transfer

                                   Gas Delivered from EBRV to facility via HP Gas Arm




                                                                           LNG




                                                         Gas



                                                                                                                                         4
LNG Lightering




             5
Double-Banked at Bahia Blanca




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                                                                         Bahía Blanca GasPort
                                                                                                 (Argentina)


                                                                       • Dockside LNG regasification
                                                                           Utilizes ship-to-ship LNG
                                                                            transfer with continuous natural
                                                                            gas send out
                       Gas offloading arm                                  Capable of 400 mmscfd
                                                                            throughput (closed-loop mode)
                                                                           Provides seasonal service
Bahía Blanca GasPort




                                                                            during Argentine winter
                                                                       • Short development time and low
                                                                         cost
                                                                           Final investment decision to in-
                                                                            service in less than 6 months
                                                                           Fixed facilities cost <5% of a
                                                                            land-based LNG terminal
                                                                       • Project partners are YPF and
                                                                         Repsol-Gas Natural
                        Excelsior docked at the Bahía Blanca GasPort

                                                                                                               7
             LNG STS Transfer
                Risk Management




    LNG

     means



Let’s Not Guess
                              8
                                                 LNG STS Transfer
                                       Partners / Development Basis

• Developed with partners
    Exmar NV / Exmar Offshore USA
    Skaugen PetroTrans
• STS Operation must meet applicable standards
    IMO - Gas code
    Class approvals by BV for LNG-RV’s, focus unrestricted liquid levels /
     all shipboard systems.
    IACS rules for LNGC: - Liquid level restrictions due to sloshing loads
    OCIMF / SIGTTO
       ○ Ship to Ship Transfer Guide (Liquefied Gases) Second Edition / Draft LNG
         STS Transfer Guidelines
       ○ SIGTTO LNG specific STS Transfer Considerations
    USCG: 33 CFR 156 Subpart B and C
    EN 1474 - 2 standards for cryogenic transfer systems


                                                                                9
                                              LNG STS Transfer
                                   Initial Engineering & Feasibility

• By BUREAU VERITAS
    Target: assess measurable operational criteria to avoid sloshing
     damage in LNG-C due to any level of partial filling during LNG
     transfer
    Conclusion: LNG-C maximum roll angle 2° ; keep heading +/-30°
     into direction of significant waves
    Hs < 2.0 m
• BY GTT
    Target: determine the maximum LNG transfer flow rate
     compatible with the treatment capacity of the increased Boil-Off
     Gas (BOG)
    Conclusion: Up to 6,000 m3/h with 60 mbar cargo tank pressure
     difference between LNG-RV and LNG-C
• HAZID / HAZOP : Original STS design
    Lloyds Register / BMT


                                                                        10
                                             LNG STS Transfer
                                          Risk Based Assessments

• Computer Motion Simulation
    Exmar Offshore / Yokohama Rubber Co. Ltd.
• Maneuvering Simulations
    Ship Maneuvering Simulator Training Center – Trondheim / Antwerp
     Maritime Academy / Lloyds Register / South Tyneside Technical
     College / SIPORT – Madrid
• STS Operations Plan
    Skaugen PetroTrans
• Dynamic Mooring Analysis
    Tension Technologies International
• Operation Manuals for rigging STS equipment
    Developed based on extensive practical tests on board
• HAZID / HAZOP : final review
    Including operation manuals, training and procedures
       (Lloyds Register)

                                                                        11
                                       LNG STS Transfer
                                       Manifold Configuration

                                                    3 liquid lines
                                                       6 hoses
                        Blank flange
                                                    1 vapour line
                                                       2 hoses



                                                       Feeder ship




LNGRV



                                                    Spool pieces

                                                       Saddles

                                                   Flexible hoses
        Dry-Break ERC
                                          Water curtain & bath
                                                                     12
   LNG STS Transfer
Gear General Arrangement




                      13
                                         LNG STS Transfer
                                   Equipment Class Approvals

• Reducing ‘Y’ Spool Pieces
    Class approval (BV)
• Emergency Release Couplings
    Type approval (BV)
• LNG Cargo Transfer Hoses
    Type approval (DNV)
• Manifold platform structural verification
    Class approval (BV)
• Hose Support Saddle verification
    Class approval (BV)




                                                          14
LNG STS Transfer
 Cargo Transfer Hose


  • Stainless Steel End
  Fittings
  • Epoxy Filled & Swaged
  • Standard ANSI 8” Flange
  •Type Approved by Class
  for STS Transfer of LNG
  •EN 1474 Compliant




                            15
LNG STS Transfer
 Cargo Transfer Hose


• 57 Layers of Polyethylene
    • Film and Fabric
• Inner / Outer Stainless
Mandrel
• Electrically Continuous
• Failure Mode
    • Leak before fail
• 400,000 Cryogenic Cycles
• Comprehensive testing by
TNO
• Flow tests at Nikisso w/ up
to 1500 m3/hr

                            16
LNG STS Transfer
 Cargo Transfer Hose



• Composite Hose
• 8” Diameter
• 15 m Length
• 0.65 m Min. Bend Radius
• 300 Liter Volume per Hose
• DNV Type Approved
• Fit for Purpose
• Light and Flexible




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LNG STS Transfer
  Cargo Hose Storage

 • Hose Storage on EBRV
 • Test Blinds on Hose Ends
 • Internal Nitrogen Blanket
 • Test, Inspection, Records




                           18
    LNG STS Transfer
Cryogenic Hose Impact Test


             • 224 kg x 1.5 m
             •3 bar LN2
             •No Leakage




                                19
LNG STS Transfer
     Sudden Impact!




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    LNG STS Transfer
Cryogenic Hose Impact Test




                        21
    LNG STS Transfer
Cryogenic Hose Crush Test




     •200 mm Crush Plate
     •270 kN Load @ 3 bar LN2
     •106 bar Pressure Test
     •Severe Leakage – No
     Burst                    22
    LNG STS Transfer
Cryogenic Hose Crush Test




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      LNG STS Transfer
Cryogenic Hose Pressure Test




                          24
                   LNG STS Transfer
                 Cryogenic Hose Integrity




• 50% Damage of Outer SUS Wire
• 6 bar – No Leakage
• 34 bar – Burst Pressure – No Jetting   25
 LNG STS Transfer
Cryogenic Hose Cycling


 • 400,000 Cycles
 • 2 Meter Stroke
 • Certified by TNO




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LNG STS Transfer
 Hose Support Saddle

   • One per Hose Pair –
   Total Four Saddles on
   Each Vessel
   • Provides Protection and
   Support in Way of Hand
   Rails
   • Maintains Adequate
   Bend Radius of Hose
   • Transfer Loads from
   Hoses to Manifold Deck
   • Chafe Protection for
   Hoses
   • 8 mm Marine Aluminum
   • FMEA on saddle
                            27
LNG STS Transfer
 Hose Support Saddle




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      LNG STS Transfer
Reducing Wye Spool Pieces

  • 16 “ x 12” x 8” (2)
  • Standard ANSI 150# Flanges
  • BV Class Approved
  • Handled by Crane Horizontally




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                                               LNG STS Transfer
                                        Specific Controls and Safety

• Emergency Shut Down (ESD)
    Pneumatic ESD systems connecting
     LNGC with EBRV
    Electric and / or Fiber Optic umbilical
     available
• Additional Water Curtain System at
  both manifold areas
    Protect ships’ trunk deck / cargo tank
     covers from accidental LNG release
    Includes ‘water bath’ on main deck
     under manifold area




                                                                  30
    LNG STS Transfer
        Water Curtains & Bath

• Additional water curtain rigged
under each manifold
• Water bath installed on deck under
manifold using dams




                                    31
                                        LNG STS Transfer
                                  Emergency Release Couplings

Emergency Release Couplings
             (ERC)
  KLAW quick release couplings =>
   quick disconnect of hoses
    in emergency situations
  Remote operation
  ‘Dry Break’
  Extensive test in cryogenic
   conditions for STS type approval
  Actuator reinforced for cryogenic
   operations




                                                           32
                   LNG STS Transfer
‘Dry-Break’ Emergency Release Coupling




                                    33
     LNG STS Transfer
Emergency Release Coupling


        • BV Class Approved
        • Function Tested w/ 1”
        ‘Hard’ Ice
        • Liquid Nitrogen @ 10
        bar




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                                     LNG STS Transfer
                                           ERC Actuated




0.8 Liter Volume Between The Disks




                                                     35
LNG STS Transfer
  Hose Brake System




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                                             LNG STS Transfer
                                 Equipment, Controls and Safety

• Emergency Shut Down (ESD)
    Pneumatic ESD systems connecting LNGC with EBRV
    Electric and Fiber Optic umbilical available
• Additional Water Curtain System at both manifold areas
    Protect ships’ trunk deck / cargo tank covers from accidental LNG
     release
    Includes ‘water bath’ on main deck under manifold area
• Emergency Release Couplings
    KLAW quick release couplings offer quick disconnect of hoses in
     emergency situations
    Remote operation
    ‘Dry Break’




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LNG STS Transfer
 Fender Arrangement




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LNG STS Transfer
 Approach Maneuver




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LNG STS Transfer
   Coming Alongside




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LNG STS TRANSFER
    Mooring Operation




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LNG STS Transfer
 Cargo Hoses Rigged




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LNG STS Transfer
    Gear Placement




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LNG STS Transfer
   Hose Connection




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LNG STS Transfer
     Line Cooldown




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                                               LNG STS Transfer
                                                 Projected Time Line

•   Rigging Fenders                                      1 hr
•   Approach Maneuver                                    1 hr
•   Mooring                                              2 hrs
•   Pre-Transfer Meeting / Gauging                       1 hr
•   Connect Hoses                                        2 hrs
•   Line Cooldown                                        1-½ hr
•   ESD / ERC Tests                                      ½ hr
•   Cargo Transfer (130,000 m3 @ 5000 m3/hr)             26 hrs
•   Hose Drain / Purge / Disconnect                      4 hrs
•   Unmooring / Vessel Separation                        1 hr
•   Fender Recovery                                      1 hr
    Total Projected Time                                 41 hrs




                                                                  46
1st Commercial STS Transfer
   Scapa Flow – 8-9 February 2007




                               47
                                                           LNG STS Transfer
                                                     Site Specific Assessments

•   Simulator training with Scapa Flow Pilots and EBRV senior staff at South
    Shields Technical College (UK)
•   Ballast Water Management issues regarding environmental preservation
•   Waterway management risk assesment with Orkney Harbor Authority,
    Scotish National Heritage and BMT-Isis
•   Simulator training with Bahia Blanca Pilots and EBRV senior staff at SiPort
•   Risk assessment of non-standard conditions prior to STS operation
      Primarily for weather considerations and forecasted conditions




                                                                             48
                  LNG STS Transfer
Full Rate Cargo Transfer (5,950 m3/hr)




                                    49
LNG STS Transfer
  Routine Inspections




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LNG STS Transfer
 Drain & Purge Hoses




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                                   LNG STS Transfer
                                                  CTMS


                          EXCALIBUR      EXCELSIOR


 Opening Volume (m3)       132,379          1,197


Volume Transferred (m3)    132,296         131,830


 Closing Volume (m3)         83            133,027


 BOG Consumed (m3)           215            273

                                                     52
LNG STS Transfer
         Statistics




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LNG STS Transfer




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