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DNV GL ©
DRAFT
SAFER, SMARTER, GREENER DNV GL ©
DRAFT
Putting Our Expertise to the Test DNV GL capability in Materials, Corrosion and Flow Assurance Service
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DNV GL ©
DRAFT
Putting Our Expertise to The Test – DNV GL Global Laboratory
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DNV GL operates 18 laboratories across three continents, offering a broad range of testing services.
DNV GL ©
DRAFT
Global Insight, Local Expertise
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By combining advanced testing with technical expertise and industry standards, we help
customers to apply technology safely, efficiently and cost effectively.
DNV GL ©
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DNV GL Laboratory Service - CAPEX, OPEX, DECOM
Services
Consulting – fitness for service, materials
selection, design
Research and testing
NACE, API, ASTM, ISO, BS, etc.
Customized tests
Prototype development
Root cause analysis, failure analysis and
forensic investigations
Training, Workshops, Guidelines
Toolbox
Laboratory Testing
Simulations – OLI, FEA, COMSOl,
Multicorp, SPPS
Network – MTI, API, NACE, NSF
Global Experience
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DNV GL ©
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Corrosion Study Services
Corrosion
Flow Induced Corrosion Study
• Flow Loop
• Rotating Cylinder Experiments
• Rotating Cage Experiments
Stress Corrosion Cracking Study
Sulfide Stress Cracking Study
Galvanic Corrosion Study
• Sacrificial Anode
Localized Corrosion Evaluation
• Pitting
• Crevice
• Coating Evaluation
• Environmental Exposure Study
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DNV GL ©
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Corrosion Testing – Tool Box
Our global facilities are equipped to study corrosion under user-specified/standard
conditions using a variety of methodologies:
Electrochemical Testing Capability
• Linear Polarization Resistance (LPR)
• Electrochemical Impedance Spectroscopy (EIS)
• Electrochemical Noise (EN)
• Galvanic Currents (Weld Testing)
• Potentiodynamic Polarization Studies
Autoclave Testing for HPHT applications
• General Exposure Studies under static and dynamic conditions.
• Real time corrosion monitoring using electrochemical methods in static conditions
Flow Loop Studies
Spool Test Studies
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DNV GL ©
DRAFT
Flow-Induced Corrosion Study: Large Scale Multiphase Flow Loop
4-inch Diameter Pipe Systems
– Operating pressure: up to 14 bars
– Operating temperature: RT -130C
– Superficial gas velocity: 0 – 18 m/s
– Superficial liquid velocity: 0.01 – 2.2 m/s
– Liquid viscosity range: 0.5 – 300 cP
– Solids capability
Multiphase Flow Technologies
– Multiphase flow characteristics (flow
pattern study)
– Flow monitoring
– Flow improved (e.g. drag reducing agent)
– Corrosion and solids management
– Evaluation of corrosion inhibitors
– Material Selection
– Development of in-line separator
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DNV GL ©
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Flow-Induced Corrosion: Single Phase Flow Loops
Two 1” ID flow loops
Tank Size: 30 gallons
316L Stainless steel
Max Pressure: 300psi
Max Temperature: 300F
Max Liquid Viscosity: 100cP
Flow Rate: 10 -120 GPM at 150psi
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DNV GL ©
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Flow-Induced Corrosion: Rotating Cylinder Electrode and Rotating Cage
Rotating Cylinder Electrode (RCE)
– Specimen Geometry: Cylindrical
– 1 to 4 specimens per test (coupon holder
design)
– P/T limits: 3500 psi @ 350C
– Advantages
– Relatively low cost testing approach
– Well characterized hydrodynamic
conditions
– CO2 and CO2/H2S conditions simulated
– Electrochemical measurements could be
implemented to monitor real corrosion
rate.
Rotating Cage (RC)
– Specimen Geometry: Flat (approx
4”x3”x1/16”)
– 4 to 8 specimens per test (hydrodynamics
will depend on number of specimens)
– P/T limits: 3500 psi @ 350C
– Advantages
– Relatively low cost approach
– CO2 and CO2/H2S conditions can be
simulated
– Disadvantages
– Potential edge effects not beneficial for
coating applications
– ASTM round robin results indicate very
significant dispersion results at well
known corrosive conditions
– Results indicate average performance
over testing time
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DNV GL ©
DRAFT
Flow-Induced Corrosion: Rotating Cylinder Electrode and Rotating Cage
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DNV GL ©
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Flow-Induced Corrosion: CO2 corrosion and It’s Inhibition – Rotating Cage Autoclave
Rotating Cage Autoclave (RCA) to evaluate inhibitors at high temperature and high
pressure.
Weight loss measurement to determine inhibited corrosion rate.
Rotating speed to simulate equivalent wall shear stress.
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DNV GL ©
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Localized Corrosion: ASTM G61 Testing
Cyclic Potentiodynamic Polarization Critical Crevice Temperature Study
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DNV GL ©
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Sour Service Studies
Our labs are capable of running fracture toughness and fatigue studies in
a range of environments including HPHT Sour environment frequently
encountered in today’s O&G production. The studies include but are not
limited to
SSC SCC Study – NACE MR0175/ISO 15156, NACE TM0169/ASTM G31, ASTM G111, NACE
TM00177, EFC 16, EFC 17, ASTM G38, ASTM G35, NACE TM0284, NACE TM0198
Hydrogen Induced Cracking – NACE TM0248, OTI 95 635
Fatigue Crack Growth Rate Study – ASTM E647, ASTM E1681
S/N Fatigue Curve Determination – ASTM E399, ASTM E1380, BS7446, ASTM G148
Slow Strain Rate Testing
ECA & FFS – DNV OS-F101, DNV RP – F108
Sour Electrochemistry – ASTM G3, ASTM G59
Sour Inhibitor Evaluation – ASTM G170, ASTM G184, ASTM G185, ASTM G208
Polymer & Lining Evaluation – NORSOK M-170, NACE TM0187, NACE TM0174, NACE
TM0185, NACE TM0183, NACE TM0192, NACE TM0296, NACE TM0297, NACE TM0298
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DNV GL ©
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Custom Testing – Autoclave Exposure Testing
Simulated environments for stressed/non-
stressed specimens
– Hydrogen Induced Cracking (HIC)
– Sulfide Stress Cracking (SSC)
– Ammonia Cracking
– Aqueous corrosion at high temperature
and pressure
NACE standard tests
– O&G Applications
Customer specific
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DNV GL ©
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Custom Testing – Autoclaves Capability in Columbus, USA
Hastelloy Autoclaves (38 vessels)
– Up to 19L volume
– Up to 10,000 psig MAOP
– 1 x 10L @ 10,000 psig vessel
– 9 x 5L @ 5,000 psig vessels with stirring
Atlas Cells (C-276) – 6 vessels
– Coated Panel testing at up to 2800 psig
Other Autoclaves (18 vessels)
– Stainless steel modules up to 22L
– PTFE lined carbon steel vessel – 32L
– 4 x 4-5L @5,000 psig
Liquid Loading of H2S
High pressure syringe pump and multiple
air-operated booster pumps to achieve high
pressures at high temperatures
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DNV GL ©
DRAFT
Custom Testing - Autoclave Capability in Singapore
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Sizes Test Capacity
1 x 5L C276 Autoclave 350DegC/300 Bar
4 x 15L 32760 Autoclaves 200DegC/100 Bar
DNV GL ©
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Computation Modelling Tools
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COMSOL modelling for hydrogen atom
distribution in a CT sample exposed to H2S
for 4 days
OLI: Speciation and Corrosion Modelling
COMSOL
• Multiphysics modelling
• CFD
• Structural Mechanics
• Chemical Reaction Engineering
• Electrochemistry
Abaqus: Mechanical Modelling
MARV: Bayesian Network based risk
assessment
Multicorp: Corrosion rate calculations in
multiphase flow conditions (Ohio
University JIP member)
SPPS: Erosion rate calculations in
multiphase flow conditions (University of
Tulsa JIP member
DNV GL ©
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Flow Assurance Services and Tools
Wax Inhibition
• Wax Prediction using simulator codes
– Profes Wax, Tulsa University Wax
V4.0, Gas Vle, Multiflash
• Wax Properties Testing - Wax
content, MP, Pour point, oil content,
carbon number distribution
Hydrate Inhibition
Corrosion Inhibition
Erosion – Corrosion
• Tulsa University JIP member - SPPS
software (erosion predictions)
• Ohio University JIP member –
Multicorp software (pipeline
corrosion predictions)
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Wax Formation
Hydrate Formation
DNV GL ©
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Analytical Facilities
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A comprehensive suite of analytical
facilities for detailed understanding of
materials and corrosion identification
studies and incident investigations
Optical and electron microscopy
SEM-EDX
Infra-Red (IR) spectroscopy
Raman Spectroscopy
Fluorescence Spectroscopy
Thermo-gravimetric analysis (TGA)
Gas Chromatography
GC- Mass Spectrometry
Inductively coupled plasma mass
spectrometry (ICPMS)
Diffusible Hydrogen Determinator
Optical Emission Spectroscopy
DNV GL ©
DRAFT
SAFER, SMARTER, GREENER
www.dnvgl.com
Thank You
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