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Putting Our Expertise to the Test DNV GL capability in Materials, Corrosion and Flow Assurance Service

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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.

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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.

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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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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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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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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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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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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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Flow-Induced Corrosion: Rotating Cylinder Electrode and Rotating Cage

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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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Localized Corrosion: ASTM G61 Testing

Cyclic Potentiodynamic Polarization Critical Crevice Temperature Study

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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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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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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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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

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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

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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

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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

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Thank You

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