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Ship to Ship LNG Transfer Technology. Excelsior Class EBRV 138,000 m 3. LNG STS Transfer Double Banked at Anchor. LNG STS Configurations. LNG transferred across dock from LNG Carrier Gas Delivered from EBRV to facility via HP Gas Arm. LNG transferred from LNG Carrier to EBRV down the dock

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lng sts configurations
LNG STS Configurations

LNG transferred across dock from LNG Carrier

Gas Delivered from EBRV to facility via HP Gas Arm

LNG transferred from LNG Carrier to EBRV down the dock

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

bah a blanca gasport argentina
Bahía Blanca GasPort(Argentina)
  • Dockside LNG regasification
    • Utilizes ship-to-ship LNG transfer with continuous natural gas send out
    • Capable of 400 mmscfd throughput (closed-loop mode)
    • Provides seasonal service 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

Gas offloading arm

Bahía Blanca GasPort

Excelsior docked at the Bahía Blanca GasPort

lng sts transfer risk management
LNG STS TransferRisk Management

L N G

means

Let’s Not Guess

slide9

LNG STS TransferPartners /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
lng sts transfer initial engineering feasibility
LNG STS TransferInitial 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
lng sts transfer risk based assessments
LNG STS TransferRisk 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)

slide12

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

lng sts transfer equipment class approvals
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)
lng sts transfer cargo transfer hose
LNG STS TransferCargo 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
lng sts transfer cargo transfer hose1
LNG STS TransferCargo 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
lng sts transfer cargo transfer hose2
LNG STS TransferCargo 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
lng sts transfer cargo hose storage
LNG STS TransferCargo Hose Storage
  • Hose Storage on EBRV
  • Test Blinds on Hose Ends
  • Internal Nitrogen Blanket
  • Test, Inspection, Records
lng sts transfer cryogenic hose impact test
LNG STS TransferCryogenic Hose Impact Test
  • 224 kg x 1.5 m
  • 3 bar LN2
  • No Leakage
lng sts transfer cryogenic hose crush test
LNG STS TransferCryogenic Hose Crush Test
  • 200 mm Crush Plate
  • 270 kN Load @ 3 bar LN2
  • 106 bar Pressure Test
  • Severe Leakage – No Burst
lng sts transfer cryogenic hose integrity
LNG STS TransferCryogenic Hose Integrity
  • 50% Damage of Outer SUS Wire
  • 6 bar – No Leakage
  • 34 bar – Burst Pressure – No Jetting
lng sts transfer cryogenic hose cycling
LNG STS TransferCryogenic Hose Cycling
  • 400,000 Cycles
  • 2 Meter Stroke
  • Certified by TNO
lng sts transfer hose support saddle
LNG STS TransferHose 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
lng sts transfer reducing wye spool pieces
LNG STS TransferReducing Wye Spool Pieces
  • 16 “ x 12” x 8” (2)
  • Standard ANSI 150# Flanges
  • BV Class Approved
  • Handled by Crane Horizontally
lng sts transfer specific controls and safety
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
lng sts transfer water curtains bath
LNG STS Transfer Water Curtains & Bath
  • Additional water curtain rigged under each manifold
  • Water bath installed on deck under manifold using dams
lng sts transfer emergency release couplings
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
lng sts transfer emergency release coupling
LNG STS TransferEmergency Release Coupling
  • BV Class Approved
  • Function Tested w/ 1” ‘Hard’ Ice
  • Liquid Nitrogen @ 10 bar
lng sts transfer erc actuated
LNG STS TransferERC Actuated

0.8 Liter Volume Between The Disks

lng sts transfer equipment controls and safety
LNG STS TransferEquipment, 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’
lng sts transfer projected time line
LNG STS TransferProjected 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

lng sts transfer site specific assessments
LNG STS TransferSite 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
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